CN105067428A - Crack initiation life test machine for elastic materials and using method thereof - Google Patents
Crack initiation life test machine for elastic materials and using method thereof Download PDFInfo
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Abstract
The invention discloses a crack initiation life test machine for elastic materials, and belongs to the field of automotive engineering. The crack initiation life test machine comprises a fatigue testing machine and an optical measuring device, wherein the fatigue testing machine is used for carrying out fatigue tests on test samples; the optical measuring device is arranged for monitoring the crack propagation conditions of the test samples in the fatigue tests, and obtaining the stress-fatigue life curve graphs and the crack initiation life of the test samples based on the test data and crack propagation conditions during the fatigue test process. According to the crack initiation life test machine for elastic materials and the using method thereof provided by the invention, fatigue loading can be carried out on a plurality of test samples at a time, and the testing efficiency is high; fatigue loading strain of non-contact optical measurement samples is used during the test process, so that the result is more accurate; a camera device is adopted to monitor the appearance of cracks in real time, so that the fatigue life can be more accurately recorded; sample change caused by stress softening and hysteresis during the test process can be detected without machine halt.
Description
Technical field
The present invention relates to automotive engineering field, particularly for resilient material crack initiation life testing machine and use its method.
Background technology
The destruction of material is a process.Destructive process is from inherent vice appears in material, cracks afterwards and crackle is expanded gradually, until the complete rupture failure of the structure of material.And crackle is from occurring the germinating stage being called crackle to this one-phase of visible fine crack; Destroy as the Crack Extension stage from visible crack to structure completely; The fracture completely of crackle, makes material occur the phenomenon of fracture failure, thus makes people more and more pay attention to the life problems of material.
In recent years, the theory about crack initiation is day by day ripe, and application is industrially also more and more extensive, makes the initiating life of Accurate Prediction crackle become an important problem.Commercially the general experimental machine of MTS test macro and moral Moses subgroup that adopts detects at present.
Realizing in process of the present invention, inventor finds that prior art at least exists following problem:
(1) adopt the exemplar number of MTS test macro one-shot measurement more limited, and be not easy the growth course of directly observing crackle.And can not accurately determine crack initiation in testing process;
(2) adopt the experimental machine of moral Moses subgroup in strain measurement and more difficult in crack initiation identification.
Summary of the invention
In order to solve at least one aspect of the above-mentioned problems in the prior art and defect, the invention provides a kind of crack initiation life testing machine for resilient material and using its method.Described technical scheme is as follows:
An object of the present invention is to provide a kind of crack initiation life testing machine for resilient material.
An also object of the present invention there is provided the method for a kind of use for the crack initiation life testing machine of resilient material.
According to an aspect of the present invention, provide a kind of crack initiation life testing machine for resilient material, described crack initiation life testing machine comprises fatigue tester and optical measuring device, described fatigue tester is used for carrying out torture test to test specimen, described optical measuring device is configured to the Crack Extension situation of monitoring test sample in described torture test, and obtains stress-Fatigue Life Curve figure and the crack initiation life of described test specimen based on the test figure in described torture test process and described Crack Extension situation.
Further, described crack initiation life testing machine also comprises clamping device, and described clamping device comprises upper grip and lower chuck, and described test specimen is fixed on described fatigue tester by described upper grip and lower chuck and carries out torture test.
Further, described crack initiation life testing machine also comprises cupping machine, before described torture test, by described upper grip and lower chuck, test specimen is fixed on described cupping machine carries out tension test, to obtain the stress-strain curve of described test specimen.
Further, described clamping device adopts multistation clamping, and single test can the multiple described test specimen of clamping.
Particularly, described optical measuring device comprises:
Camera head, by taking the state picture in described torture test of described test specimen, for measuring the strain of described test specimen and the size of crackle when processing test figure;
Tired numeration module, described fatigue numeration module for adding up the loading number of times of the fluctuating circulating stress in described torture test, thus calculates the fatigue lifetime of described test specimen;
Crack monitoring module, described crack monitoring module is used for, after described fatigue tester starts, being monitored the Crack Extension situation on described test specimen by described state picture;
Control and human-computer interaction module, described control and human-computer interaction module are used for carrying out man-machine interaction, and before carrying out torture test, preset the threshold value of crackle in described control and human-computer interaction module,
When torture test, when described crackle reaches default threshold value, record the loading number of times of the fluctuating circulating stress of described test specimen and the state picture of corresponding crack initiation, the loading number of times of the fluctuating circulating stress when described crackle reaches default threshold value is the crack initiation life of described test specimen.
Particularly, described optical measuring device also comprises lighting source, for described camera head supplementary light when taking described state picture,
Described camera head is CCD camera,
In described torture test, described lighting source and described CCD camera are arranged on before described test specimen;
Described resilient material comprises elastomeric material.
Further, before the test, described test specimen arranges two mark lines in the width direction, and measure the distance between described two mark lines, for the tensile strain of described test specimen can be obtained in torture test.
Particularly, described optical measuring device also comprises:
Image buffer storage and processing module, described image processing module is used for state picture described in buffer memory;
Image pick-up card, described state picture is sent in described image buffer storage and processing module by described image pick-up card by described camera head;
Interface module, described state picture is sent to described image buffer storage and processing module by described interface module by described image pick-up card;
Strain measurement module, described strain measurement module measures the tensile strain of the test specimen when described cupping machine carries out tension test, the feature of described two mark lines after the module of strain measurement described in torture test is extracted in each stress loading, and obtain the distance now between described two mark lines;
Memory module, the loading number of times of the fluctuating circulating stress that described memory module applies for the data and described fatigue tester recording the stress and strain of described test specimen;
Described image buffer storage and processing module, interface module, strain measurement module, tired count module, crack monitoring module and memory module are controlled by described control and human-computer interaction module.
According to a further aspect in the invention, present invention also offers a kind of method using the above-mentioned crack initiation life testing machine for resilient material, described method comprises the following steps:
(1) along the Width of described test specimen, the surface of described test specimen arranges two described mark lines and the distance measured between two described mark lines;
(2) by described cupping machine, described test specimen is stretched to maximum position, and obtains the tensile strain of described test specimen now by described strain measurement module, afterwards obtained tensile strain data are saved in described memory module;
(3) start described fatigue tester and start to load, making described fatigue numeration module start to record the loading number of times of fluctuating circulating stress simultaneously;
(4) pre-set the loading number of times that predetermined pulsating stress circulates in described control and human-computer interaction module after, start described crack monitoring module, control described camera head by described control and human-computer interaction module simultaneously, make described camera head capture the state picture of described test specimen according to certain frequency, and the described state picture captured is stored in described image buffer storage and processing module;
(5) described crack monitoring module carries out Identification of Cracks to the described state picture in described image buffer storage and processing module, when recognizing the crackle of the threshold value being greater than setting, stop the monitoring to described test specimen, and the loading number of times of fluctuating circulating stress now and the state picture of corresponding crack initiation are saved in described memory module;
(6) continue to monitor other test specimen, until all test specimen total Tests are complete.
Further, in the process of described torture test, described strain measurement module is extracting part separating tests data from described image buffer storage and processing module and described memory module, to calculate the elongation change situation of test specimen described in the pilot process of torture test;
After step (5) or (6), also comprise by carrying out data processing to obtain pulsating cyclic fatigue lifetime to the loading number of times of loaded fluctuating circulating stress and fluctuating circulating stress circulation, and described pulsating cyclic is converted into the cyclic deformation life-span fatigue lifetime.
The beneficial effect of technical scheme provided by the invention is:
(1) the crack initiation life testing machine for resilient material provided by the invention and use its method once can carry out the fatigue loading of multiple sample, and testing efficiency is high;
(2) the crack initiation life testing machine for resilient material provided by the invention and use its method to use the fatigue loading of contactless optical measurement sample to strain, makes result more accurate;
(3) the crack initiation life testing machine for resilient material provided by the invention and use its method to adopt the appearance of picture pick-up device Real-Time Monitoring crackle, can record number of times fatigue lifetime more accurately;
(4) the crack initiation life testing machine for resilient material provided by the invention and use its method can due to the exemplar change that stress softening and hysteresis cause in detection experiment process, and need not shut down and detect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the crack initiation life testing machine for resilient material according to an embodiment of the invention;
Fig. 2 is the structural representation being fixed with the clamping device of test specimen shown in Fig. 1;
Fig. 3 is the structural representation of the computing machine shown in Fig. 1;
Fig. 4 is the process flow diagram of use according to an embodiment of the invention for the method for the crack initiation life testing machine of resilient material.
Wherein, 100 for the crack initiation life testing machine of resilient material, 10 optical measuring devices, 11 test specimens, 112 mark lines, 12 camera heads, 13 lighting sources, 14 image pick-up cards, 15 computing machines, 151 interface modules, 152 image buffer storages and processing module, 153 tired numeration modules, 154 crack monitoring modules, 155 strain measurement modules, 156 memory modules, 157 control and human-computer interaction module, 20 clamping devices, 21 upper grips, 22 lower chucks.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
See Fig. 1, it illustrates the crack initiation life testing machine 100 for resilient material according to an embodiment of the invention.Crack initiation life testing machine 100 comprises fatigue tester (not shown) and optical measuring device 10.Fatigue tester is used for carrying out torture test to test specimen 11; Optical measuring device 10 is configured to the Crack Extension situation of monitoring test sample 11 in torture test, and obtains stress-Fatigue Life Curve figure and the crack initiation life of described test specimen based on the test figure in torture test process and Crack Extension situation.
As shown in Figure 2, crack initiation life testing machine 100 also comprises clamping device 20 and cupping machine (not shown), and particularly, clamping device 20 comprises upper grip 21 and lower chuck 22.At the trial, first make upper grip 21 and lower chuck 22 are fixed on cupping machine by test specimen 11 and carry out tension test, to obtain the stress-strain curve of test specimen 11; Afterwards the upper grip 21 and lower chuck 22 that are fixed with test specimen 11 are fixed on crack initiation life fatigue tester (not shown) carrying out torture test and acquisition test specimen 11.
In an example of the present invention, when processing test figure, the stress-strain curve of acquisition and stress-Fatigue Life Curve figure by such as founding mathematical models or by computer simulation to infer the fatigue lifetime and crack initiation life that the actual parts be made up of resilient material.
In another example of the present invention, clamping device is the special clamping device of resilient material (such as elastomeric material), it adopts multistation clamping, and single test can the multiple test specimen 11 of clamping, and making at the trial can the multiple test specimen 11 of one-shot measurement.
Continue see Fig. 2, before the test, first two mark lines 112 are set in the width direction on test specimen 11, and two mark lines 112 are made for during free state at test specimen 11, and the distance measured between two mark lines, for the tensile strain of test specimen can be obtained in torture test.
Shown in composition graphs 1 and Fig. 3, optical measuring device 10 comprises camera head 12, lighting source 13, image pick-up card 14, interface module 151, image buffer storage and processing module 152, fatigue counts module 153, crack monitoring module 154, strain measurement module 155, memory module 156 and control and human-computer interaction module 157.Those skilled in the art can understand, the all right setting data processing module separately of optical measuring device 10, such as computing machine 15 (as shown in Figure 1), and make data processing module (such as computing machine 15) comprise interface module 151, image buffer storage and processing module 152, tired module 153, crack monitoring module 154, strain measurement module 155, the memory module 156 and control and human-computer interaction module 157 of counting.This example is only a kind of exemplary illustration, not should be understood to one restriction of the present invention.
Particularly, camera head 12 is placed on before test specimen 11 (as shown in Figure 1) when carrying out torture test, for taking the state picture in torture test of test specimen 11.By such design, when optical measuring device 10 is when processing test figure, by the strain of captured state image measurement test specimen and flaw size size, and the appearance of crackle and the spread scenarios of crackle can also be monitored in real time.In order to illumination brightness during supplementary shooting, lighting source 13 can also be placed before test specimen.
In an example of the present invention, camera head 12 is CCD camera.Owing to being provided with camera in optical measuring device 10, making in process of the test can the appearance of Real-Time Monitoring crackle, can record the fatigue lifetime of test specimen so more accurately.
When carrying out torture test, the state picture of collection is connected in computing machine 15 through image pick-up card 14 through data line by camera head 12, carries out alternately with the control program inside computing machine.When delivery status picture, the reading and writing data with image pick-up card 14 is realized by interface module 151, the state picture of making is sent in image buffer storage and processing module 152 by image pick-up card 14 and interface module 151 successively, make the buffer memory that image buffer storage and processing module 152 realize state picture, this image buffer storage and processing module 152 also possess the function such as binaryzation, noise reduction.In an example of the present invention, interface module 151 is I/O interface module, certainly it will be appreciated by those skilled in the art that, interface module can also be usb interface module, input/output interface module etc., those skilled in the art can select as required accordingly, this example is only a kind of illustrated examples, not should be understood to one restriction of the present invention.
For fatigue life test, it is very large for loading strain for material lifetime impact, and for common tensile testing machine and durable testing machine, all can not measure stress and strain during loading very accurately.This is due on the one hand, conventional extensometer only can measure before the test or measure before strain, the strain in test loading can not be measured.If torture test needs to measure the strain in test loading, so can only shut down and measure; On the other hand, because the exemplar clamping deformation comparison of the materials such as rubber is large, and due to the materials such as rubber softer, make the precision of strain measurement not high.Existing existing experiment shows, owing to straining the error of 10%, make to cause material lifetime error at double, therefore torture test must need new method to measure more accurately and controlled strain.Part test machine is equipped with Video Extensometer, can the strain of noncontacting measurement exemplar, but do not possess Identification of Cracks function and the control of torture test and numeration function that torture test needs, thus, in design of the present invention, additionally provide tired numeration module 153, crack monitoring module 154 and strain measurement module 155.
Tired numeration module 153 for adding up the loading number of times of the fluctuating circulating stress in torture test, thus calculates the fatigue lifetime of test specimen 11.When fatigue numeration module processes test figure, use the methods such as SWT to be changed into the symmetrical cycle life-span pulsating cyclic life-span of acquisition, and record deployment conditions fatigue lifetime under same strain, provide probability statistics afterwards.Tired numeration module 153 can calculate from the initial time of on-test, and also can be communicated with fatigue tester by I/O interface module is obtained, and those skilled in the art can select as required accordingly.
Crack monitoring module 154 is for after fatigue tester starts, crack monitoring module 154 obtains state picture from image buffer storage and processing module 152, and Identification of Cracks is carried out with the Crack Extension situation on monitoring test sample to state picture, achieve the real-time monitoring that crackle is occurred and expanded.Before carrying out torture test, control with human-computer interaction module 157 in prefabricated certain fluctuating circulating stress loading number of times after, start crack monitoring module 154, camera head 12 is by controlling the clock control with human-computer interaction module 157 simultaneously, and according to certain frequency, test specimen 11 is captured, capturing the state picture obtained actual is that test specimen 11 is stretched at utmost corresponding state picture.After shooting state picture, the time of crack monitoring module 154 or camera head 12 records photographing state picture, and the loading number of times of the test figure of obtained time and fluctuating circulating stress is stored in memory module 156, the state picture of acquisition is stored in image buffer storage and processing module 152.
After state picture is stored into image buffer storage and processing module 152, crack monitoring module 154 carries out Identification of Cracks to the state picture be saved in image buffer storage and processing module 152.When recognizing the crackle being greater than and arranging threshold value, stop the monitoring to this test specimen, and be saved in memory module by the state image data of the loading number of times of fluctuating circulating stress now and the crackle of candid photograph, and the loading number of times of fluctuating circulating stress is now the crack initiation life of test specimen 11.
In an example of the present invention, the threshold value of the crackle preset is flaw size size, when crack monitoring module 154 flaw size recognized in state picture is greater than the flaw size preset, stop the monitoring to this test specimen, and the state image data of the loading number of times of fluctuating circulating stress now and the crack initiation of candid photograph is saved in memory module, thus obtain the state picture of crack initiation life and crack initiation, furthermore achieved that the real-time monitoring to crack initiation.
Strain measurement module 155 is for measuring the tensile strain of the test specimen when cupping machine carries out tension test, and the test figure of the tensile strain obtained is numbered according to certain form and keeps reaching in memory module.The tensile strain obtained in tension test is for the calculating of Fatigue Life Curve.
In the process of carrying out torture test, strain measurement module 155 adopts video derivative method to be extracted in the feature of two mark lines after at every turn carrying out stress loading, thus obtains the distance now between two mark lines.Process test figure time, by obtain after stress loading two mark lines between distance, calculate obtain corresponding tensile strain.Make it possible to, at the trial without the need to shutting down, the tensile strain of the test specimen 11 in the process of carrying out fluctuating circulating stress loading can be measured by such design.
Memory module 156 records the control data of the stress and strain data that tensile strain measures, the loading time logarithmic data of tired fluctuating circulating stress, intermediate data and control and human-computer interaction module 157.Control with human-computer interaction module 157 for carrying out man-machine interaction, module 153, crack monitoring module 154, strain measurement module 155 and memory module 156 and control interface module 151, image buffer storage and processing module 152, fatigue count.
See Fig. 4, it illustrates the flow process used for the method for the crack initiation life testing machine of resilient material.The step of the method for the crack initiation life testing machine being used for resilient material is used to comprise:
(1) clamping device 20 is connected to cupping machine, camera head 12 in optical measuring device 10 and lighting source 13 are positioned over before test specimen 11, the test specimen bar of tailoring is carried out mark, be installed to above grip device 20, distance now between mark line is through measuring, and namely this distance is known quantity;
(2) cupping machine is stretched to maximum position, uses strain measurement module 155 to measure the tensile strain of now each test specimen 11, afterwards obtained tensile strain data are saved in memory module 156 by certain form numbering;
(3) start fatigue tester and start to load, making tired numeration module 153 start record simultaneously and load number of times;
(4) pre-set after predetermined fluctuating circulating stress loads number of times and start crack monitoring module 154 in control with human-computer interaction module 157, simultaneously by controlling to control camera head 12 with human-computer interaction module 157, make camera head 12 capture the state picture of test specimen 11 according to certain frequency, and the state picture of candid photograph is stored in image buffer storage and processing module 152;
(5) the state picture in crack monitoring module 154 pairs of image buffer storages and processing module 152 carries out Identification of Cracks, when recognizing the crackle of the threshold value being greater than setting, stop the monitoring to test specimen, and the loading number of times of fluctuating circulating stress now and the state picture of corresponding crack initiation are saved in memory module 156;
(6) continue to monitor other test specimen, until all test specimen total Tests are complete.
In an example of the present invention, in the process of torture test, strain measurement module 155 is extracting part separating tests data from image buffer storage and processing module 152 and memory module 156, to calculate the elongation change situation of test specimen 11 in the pilot process of torture test.It is alternatively the elongation of test specimen 11; the strain of the test specimen obtained in pilot process is calculated by the elongation change situation (i.e. elongation) obtained; due to such design make it possible to obtain torture test carry out in the process of fluctuating circulating stress loading without the need to shut down, can obtain test specimen in this loading procedure strain.
In another example of the present invention, after step (5) or (6), also comprise by carrying out data processing to the loading number of times of applied fluctuating circulating stress and fluctuating circulating stress to obtain pulsating cyclic fatigue lifetime, data fatigue lifetime of matching afterwards, are converted into the cyclic deformation life-span by pulsating cyclic fatigue lifetime.
The beneficial effect of technical scheme provided by the invention is:
(1) the crack initiation life testing machine for resilient material provided by the invention and use its method once can carry out the fatigue loading of multiple sample, and testing efficiency is high;
(2) the crack initiation life testing machine for resilient material provided by the invention and use its method to use the fatigue loading of contactless optical measurement sample to strain, makes result more accurate;
(3) the crack initiation life testing machine for resilient material provided by the invention and use its method to adopt the appearance of picture pick-up device Real-Time Monitoring crackle, can record number of times fatigue lifetime more accurately;
(4) the crack initiation life testing machine for resilient material provided by the invention and use its method can due to the exemplar change that stress softening and hysteresis cause in detection experiment process, and need not shut down and detect.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1., for a crack initiation life testing machine for resilient material, it is characterized in that,
Described crack initiation life testing machine comprises fatigue tester and optical measuring device, described fatigue tester is used for carrying out torture test to test specimen, described optical measuring device is configured to the Crack Extension situation of monitoring test sample in described torture test, and obtains stress-Fatigue Life Curve figure and the crack initiation life of described test specimen based on the test figure in described torture test process and described Crack Extension situation.
2. the crack initiation life testing machine for resilient material according to claim 1, is characterized in that,
Described crack initiation life testing machine also comprises clamping device, and described clamping device comprises upper grip and lower chuck, and described test specimen is fixed on described fatigue tester by described upper grip and lower chuck and carries out torture test.
3. the crack initiation life testing machine for resilient material according to claim 2, is characterized in that,
Described crack initiation life testing machine also comprises cupping machine, by described upper grip and lower chuck, test specimen is fixed on described cupping machine and carries out tension test, to obtain the stress-strain curve of described test specimen before described torture test.
4. the crack initiation life testing machine for resilient material according to claim 3, is characterized in that,
Described clamping device adopts multistation clamping, and single test can the multiple described test specimen of clamping.
5. the crack initiation life testing machine for resilient material according to any one of claim 1-4, is characterized in that,
Described optical measuring device comprises:
Camera head, by taking the state picture in described torture test of described test specimen, for measuring the strain of described test specimen and the size of crackle when processing test figure;
Tired numeration module, described fatigue numeration module for adding up the loading number of times of the fluctuating circulating stress in described torture test, thus calculates the fatigue lifetime of described test specimen;
Crack monitoring module, described crack monitoring module is used for, after described fatigue tester starts, being monitored the Crack Extension situation on described test specimen by described state picture;
Control and human-computer interaction module, described control and human-computer interaction module are used for carrying out man-machine interaction, and before carrying out torture test, preset the threshold value of crackle in described control and human-computer interaction module,
When torture test, when described crackle reaches default threshold value, record the loading number of times of the fluctuating circulating stress of described test specimen and the state picture of corresponding crack initiation, the loading number of times of the fluctuating circulating stress when described crackle reaches default threshold value is the crack initiation life of described test specimen.
6. the crack initiation life testing machine for resilient material according to claim 5, is characterized in that,
Described optical measuring device also comprises lighting source, for described camera head supplementary light when taking described state picture,
Described camera head is CCD camera,
In described torture test, described lighting source and described CCD camera are arranged on before described test specimen;
Described resilient material comprises elastomeric material.
7. the crack initiation life testing machine for resilient material according to claim 5, is characterized in that,
Before the test, described test specimen arranges two mark lines in the width direction, and measure the distance between described two mark lines, for the tensile strain of described test specimen can be obtained in torture test.
8. the crack initiation life testing machine for resilient material according to claim 7, is characterized in that,
Described optical measuring device also comprises:
Image buffer storage and processing module, described image processing module is used for state picture described in buffer memory;
Image pick-up card, described state picture is sent in described image buffer storage and processing module by described image pick-up card by described camera head;
Interface module, described state picture is sent to described image buffer storage and processing module by described interface module by described image pick-up card;
Strain measurement module, described strain measurement module measures the tensile strain of the test specimen when described cupping machine carries out tension test, the feature of described two mark lines after the module of strain measurement described in torture test is extracted in each stress loading, and obtain the distance now between described two mark lines;
Memory module, the loading number of times of the fluctuating circulating stress that described memory module applies for the data and described fatigue tester recording the stress and strain of described test specimen;
Described image buffer storage and processing module, interface module, strain measurement module, tired count module, crack monitoring module and memory module are controlled by described control and human-computer interaction module.
9. use a method for the crack initiation life testing machine for resilient material according to any one of claim 1-8, described method comprises the following steps:
(1) along the Width of described test specimen, the surface of described test specimen arranges two described mark lines and the distance measured between two described mark lines;
(2) by described cupping machine, described test specimen is stretched to maximum position, and obtains the tensile strain of described test specimen now by described strain measurement module, afterwards obtained tensile strain data are saved in described memory module;
(3) start described fatigue tester and start to load, making described fatigue numeration module start to record the loading number of times of fluctuating circulating stress simultaneously;
(4) pre-set the loading number of times that predetermined pulsating stress circulates in described control and human-computer interaction module after, start described crack monitoring module, control described camera head by described control and human-computer interaction module simultaneously, make described camera head capture the state picture of described test specimen according to certain frequency, and the described state picture captured is stored in described image buffer storage and processing module;
(5) described crack monitoring module carries out Identification of Cracks to the described state picture in described image buffer storage and processing module, when recognizing the crackle of the threshold value being greater than setting, stop the monitoring to described test specimen, and the loading number of times of fluctuating circulating stress now and the state picture of corresponding crack initiation are saved in described memory module;
(6) continue to monitor other test specimen, until all test specimen total Tests are complete.
10. use according to claim 9 is used for the method for the crack initiation life testing machine of resilient material, it is characterized in that,
In the process of described torture test, described strain measurement module is extracting part separating tests data from described image buffer storage and processing module and described memory module, to calculate the elongation change situation of test specimen described in the pilot process of torture test;
After step (5) or (6), also comprise by carrying out data processing to obtain pulsating cyclic fatigue lifetime to the loading number of times of loaded fluctuating circulating stress and fluctuating circulating stress circulation, and described pulsating cyclic is converted into the cyclic deformation life-span fatigue lifetime.
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| CN110967267A (en) * | 2019-11-25 | 2020-04-07 | 中国民用航空飞行学院 | Test method for judging fatigue crack initiation life |
| CN114166630A (en) * | 2021-11-30 | 2022-03-11 | 天津大学 | Transverse crack sensitivity test device and method based on composite restraint |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2223319B (en) * | 1988-10-03 | 1992-08-26 | Rolls Royce Plc | Method & means for fatigue testing |
| CN202885784U (en) * | 2012-11-04 | 2013-04-17 | 长春科新试验仪器有限公司 | Video extensometer |
| JP2013088262A (en) * | 2011-10-17 | 2013-05-13 | National Institute For Materials Science | Very low temperature ultrasonic fatigue nondestructive test evaluation device and analysis and evaluation method |
| CN103278386A (en) * | 2013-05-22 | 2013-09-04 | 天津大学 | Measurement system for thin-film material tension-compression fatigue dynamic loading |
| CN103529128A (en) * | 2013-09-30 | 2014-01-22 | 天津工程机械研究院 | On-line fatigue crack detecting system and on-line fatigue crack detecting method |
-
2015
- 2015-08-13 CN CN201510497139.6A patent/CN105067428B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2223319B (en) * | 1988-10-03 | 1992-08-26 | Rolls Royce Plc | Method & means for fatigue testing |
| JP2013088262A (en) * | 2011-10-17 | 2013-05-13 | National Institute For Materials Science | Very low temperature ultrasonic fatigue nondestructive test evaluation device and analysis and evaluation method |
| CN202885784U (en) * | 2012-11-04 | 2013-04-17 | 长春科新试验仪器有限公司 | Video extensometer |
| CN103278386A (en) * | 2013-05-22 | 2013-09-04 | 天津大学 | Measurement system for thin-film material tension-compression fatigue dynamic loading |
| CN103529128A (en) * | 2013-09-30 | 2014-01-22 | 天津工程机械研究院 | On-line fatigue crack detecting system and on-line fatigue crack detecting method |
Non-Patent Citations (2)
| Title |
|---|
| 中华人民共和国国家质量监督检验检疫总局等: "硫化橡胶伸张疲劳的测定", 《中华人民共和国国家标准GB_T_1688-2008》 * |
| 王苗苗 等: "拉伸载荷作用下AlN夹杂物对航空用超高强度钢中裂纹萌生的影响", 《钢铁研究学报》 * |
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| CN110702687A (en) * | 2019-09-29 | 2020-01-17 | 武汉科技大学 | Crack real-time monitoring system for seat framework fatigue test |
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| CN114166630B (en) * | 2021-11-30 | 2023-09-12 | 天津大学 | Transverse crack sensitivity test device and method based on composite restraint |
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