CN209878482U - Device for testing fatigue mechanical properties of material under tensile-bending composite load - Google Patents
Device for testing fatigue mechanical properties of material under tensile-bending composite load Download PDFInfo
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- CN209878482U CN209878482U CN201920307102.6U CN201920307102U CN209878482U CN 209878482 U CN209878482 U CN 209878482U CN 201920307102 U CN201920307102 U CN 201920307102U CN 209878482 U CN209878482 U CN 209878482U
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Abstract
The utility model relates to a material fatigue mechanical properties testing arrangement under tensile-crooked combined load belongs to accurate scientific instrument and material test field. Including vibration isolation base, braced frame, supersound loading module, hydraulic pressure loading module, tensile loading module, ultrasonic inspection module, braced frame links to each other with the vibration isolation base, and hydraulic pressure loading module passes through flange and links to each other with braced frame, and supersound loading module passes through the screw and links to each other with hydraulic pressure loading module, and tensile loading module, ultrasonic inspection module set up on the vibration isolation base. Has the advantages that: the span-range loading with high frequency and high load can be realized; the ultrahigh frequency bending fatigue loading and the stretching-bending static and dynamic composite loading can be realized; the tensile loading module can ensure that the tested material sample is accurately centered. The high-frequency fatigue test device can be used for performing high-frequency fatigue tests on tested material samples of different materials and different sizes under static and dynamic composite loads, and provides a reliable means for service performance analysis of key materials in aerospace and numerous fields.
Description
Technical Field
The utility model relates to an accurate scientific instrument and material test field, in particular to material fatigue mechanical properties testing arrangement under tensile-crooked combined load. The device can be used for carrying out several tests such as a traditional static tensile loading test, a high-frequency bending fatigue loading test, an ultrahigh-frequency bending fatigue loading test and the like, can also realize a tensile-bending composite loading high-frequency fatigue test under the load of frequency and load span range, carries out in-situ monitoring on the generation and the expansion of cracks of a tested material in the test process, and provides a test method for revealing a correlation rule between the fatigue mechanical property change of the tested material and an external load and a fatigue damage mechanism.
Background
In recent decades, the scientific technology of China has rapidly progressed, the national economy has developed vigorously, and people have made more rigorous requirements on the safety, reliability, economy and the like of mechanical equipment. Fatigue failure is extremely common in engineering practice and extremely extensive in the field of design, and according to incomplete statistics, the percentage of fatigue failure in total failure of a material is as high as about 80%. Particularly in the fields of key materials in the aviation, aerospace, nuclear industries and the like, the materials bear stretching, bending alternating loads and composite loads under typical service working conditions, and the frequency can reach up to kilohertz, so that high-frequency fatigue fracture damage of aviation, aerospace equipment and other key mechanical structures is caused to happen occasionally, and serious economic loss is caused.
At present, conventional fatigue tests are carried out on commercial electro-hydraulic servo fatigue testing machines, ultrasonic fatigue testing machines, rotary bending fatigue testing machines and the like, only single load fatigue loading such as conventional tensile/compression fatigue and bending fatigue can be realized, fatigue tests under multi-load composite loading are difficult to realize, and the composite load state of materials under actual service working conditions cannot be simulated. Therefore, for many fields, especially for the fields of critical materials such as aviation, aerospace and nuclear industries, the development of a high-frequency fatigue mechanical property testing technology under the action of a composite load of a critical structural material and the development of a high-frequency fatigue mechanical property testing device become key problems to be solved at present.
Disclosure of Invention
An object of the utility model is to provide a material fatigue mechanical properties testing arrangement under tensile-crooked combined load solves current test mode and can not realize frequency, load span range loading problem and the tensile-crooked combined load effect under the hyperfrequency fatigue loading problem. The device can be used for carrying out several tests such as a traditional static tensile loading test, a high-frequency bending fatigue loading test, an ultrahigh-frequency bending fatigue test and the like, can also be used for realizing a tensile-bending composite loading high-frequency fatigue test under the load of frequency and load span, carrying out in-situ monitoring on the generation and expansion of cracks of a tested material in the test process, providing a test method for revealing the correlation rule between the fatigue mechanical property change of the tested material and an external load and a fatigue damage mechanism, and providing a reliable means for the mechanical property analysis of key structural materials in the fields of aviation, aerospace and the like.
The above object of the utility model is realized through following technical scheme:
the device for testing the fatigue mechanical properties of the material under the tensile-bending composite load adopts four-column vertical symmetrical arrangement as a whole and comprises a vibration isolation base 1, a supporting frame 2, an ultrasonic loading module 3, a hydraulic loading module 4, a tensile loading module 5 and an ultrasonic flaw detection module 6, wherein the supporting frame 2 is connected with the vibration isolation base 1 through threads, the hydraulic loading module 4 is connected with the supporting frame 2 through a connecting flange, the ultrasonic loading module 3 is connected with the hydraulic loading module 4 through threads, the tensile loading module 5 is arranged on the vibration isolation base 1, and the ultrasonic flaw detection module 6 is arranged on the vibration isolation base 1.
The vibration isolation base 1 is: the vibration isolation platform 11 is connected with the marble base 12 through screws; support frame 2 adopt four post vertical structures, go up backup pad 9 and link to each other with four stands 7 through the screw, stand 7 links to each other with vibration isolation base 1 through the screw, connecting block c10 is fixed on stand 7, links to each other with hydraulic connecting plate 8 through the screw, realizes the stable support to the device.
The hydraulic loading module 4 has the functions of static bending loading and high-frequency bending fatigue loading and realizes static bending loading or 0 ~ 100Hz high-frequency bending fatigue loading of a tested material sample, the energy accumulator 22 and the hydraulic pipeline 25 are connected with the hydraulic valve plate 21, the hydraulic valve plate 21 is connected with the high-frequency servo hydraulic cylinder 24, the hydraulic cylinder protective sleeve 23 is fixed with the tail end of the high-frequency servo hydraulic cylinder 24 through a bolt, the hydraulic flange plate 26 is connected with the extending end of the piston rod of the high-frequency servo hydraulic cylinder 24 through a bolt, one end of the expansion sleeve 20 is connected with the tail end of the piston rod of the high-frequency servo hydraulic cylinder 24, and the other end of the expansion sleeve is connected.
The ultrasonic loading module 3 is connected with the hydraulic loading module 4 through the connecting plate 16, so that the 20kHz ultrahigh frequency bending fatigue loading of the ultrahigh frequency bending fatigue sample 33 is realized; the ultrasonic connector 18 is connected with the ultrasonic transducer 17, the amplitude transformer 13 is connected with the ultrasonic connector 18, and the ultrasonic bending pressure head 19 is connected with the amplitude transformer 13; the ultrasonic connecting plate 14 is fixed at the shaft shoulder of the ultrasonic connector 18, one end of the dowel bar 15 is connected with the connecting plate 16, and the other end of the dowel bar penetrates through a through hole in the ultrasonic connecting plate 14 and is fixed through a nut.
The tensile loading module 5 comprises a sample centering mechanism 36 and a pin-through stretch-bending composite clamp 32, and is used for respectively realizing accurate centering and static tensile/compressive loading on a tested material sample; the sample centering mechanism 36 and the pin-penetrating type stretch bending composite clamp 32 are both arranged on the Y moving platform 31, and the quick switching of the two sub-modules of the sample centering mechanism 36 and the pin-penetrating type stretch bending composite clamp 32 is completed by manually moving the Y moving platform 31.
The tensile loading module 5 is: the servo motor 28 is fixed by a motor fixing plate and is connected with a lead screw a37 fixed on a lead screw seat a30 and a lead screw seat b34 through a coupler 29, and the lead screw seat a30 and the lead screw seat b34 are fixed on the base 41 through bolts; the slide block 35 is assembled with the precision linear guide rail 40 and fixed on the base 41; the Y moving platform 31 is assembled with the dovetail guide rail 38, the dovetail guide rail 38 is fixed on the X moving platform 39, and the X moving platform 39 is connected with the sliding block 35; when the tensile loading module 5 works, the servo motor 28 outputs torque to the lead screw a37 through the coupler 29, and drives the X moving platform 39 to move in the reverse direction, so that accurate centering and static tensile loading of a tested material sample are realized.
The sample centering mechanism 36 is: the screw c54 is arranged on the connecting block a47 and the connecting block b57, the supporting seat 56 is fixed on the connecting block a47 and the connecting block b57, the screw positioning sleeve 52 is fixed at two ends of the screw c54, the adjusting knob b55 is fixed at the tail end of the screw c54, the sample supporting seat 49 is fixed on the connecting block a47, the axial positioning block 48 is assembled with the screw c54, and the guide rail 59 is fixed on the connecting block b57 and the screw supporting seat b 61; the lead screw d46 and the lead screw c54 are respectively fixed on the lead screw supporting seat a50 and the lead screw supporting seat b61, and the spline sleeve 45 is assembled with the lead screw d46 and the lead screw c 54; the adjusting knob c60 is connected with the tail end of the lead screw c54, the positioning block 58 is assembled with the guide rail 59 and the lead screw c54, and the two adjusting knobs a51 are respectively connected with the two positioning blocks 58.
The ultrasonic flaw detection module 6 is arranged on the vibration isolation base 1, and an ultrasonic probe of the ultrasonic flaw detection module 6 is held by hand to scan the surface of the ultrahigh frequency bending fatigue sample 33 during testing, so that in-situ monitoring of the surface fatigue cracks of the ultrahigh frequency bending fatigue sample 33 in the testing process is realized.
The beneficial effects of the utility model reside in that:
1. novel structure, overall arrangement is compact. The utility model discloses composite load's loading is realized mainly by hydraulic pressure loading module 4, supersound loading module 3 and tensile loading module 5, and the typical stress state under numerous field key structure material service conditions such as aviation, space flight has really been simulated, combines the ultrasonic flaw detection test technique of ultrasonic flaw detection module 6, realizes the normal position monitoring to the crackle production of being surveyed the material sample in the testing process and the extension phenomenon. The whole machine adopts a modular design. The vibration isolation device sequentially comprises a vibration isolation base 1, a supporting frame 2, an ultrasonic loading module 3, a hydraulic loading module 4, a stretching loading module 5 and an ultrasonic flaw detection module 6. Standardizing the equipment and being beneficial to maintenance.
2. The hydraulic loading and ultrasonic loading functions are simultaneously integrated on the material fatigue performance testing device, so that the device can be used for performing several tests such as a traditional static tensile loading test, a high-frequency bending fatigue loading test, an ultrahigh-frequency bending fatigue test and the like, and can also be used for realizing a tensile-bending composite loading high-frequency fatigue test under the load of frequency and load span range.
3. The tensile loading module of the whole machine comprises three positive and negative screw rods, the positive and negative screw rods are driven by a motor and manually adjusted to realize coarse adjustment and fine adjustment of centering of a tested material sample in the length direction and accurate centering of the tested material sample in the width direction, and the tensile loading module can be used for performing bending fatigue tests on tested material samples of different materials and different sizes.
4. The stretching and loading module of the whole machine comprises two sub-modules of a pin-penetrating type stretch bending composite clamp 32 and a sample centering mechanism 34, and the two sub-modules can be switched by manually adjusting a Y moving platform 31, so that the switching of two load modes of ultrahigh frequency bending fatigue load loading and high frequency fatigue load loading under stretching-bending composite load can be realized, the operation is simple and convenient, and the functions of the device are increased.
5. The utility model discloses can realize that frequency, load are striden tensile-crooked compound loading high frequency fatigue test under the range loading to can the expansion of real-time supervision tested material sample crackle, compensate not enough on conventional material testing machine load coupling loading and the normal position monitoring, can be more true simulation aviation, space flight and nuclear industry etc. key material field material's the state of being on active service.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate example embodiments of the invention and together with the description serve to explain the invention without limitation.
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the support frame and the vibration isolation base of the present invention;
fig. 3 is a schematic diagram of each part of the ultrasonic loading module of the present invention;
fig. 4 is a schematic diagram of each part of the hydraulic loading module of the present invention;
fig. 5 to 7 are schematic views of parts of the tensile loading module according to the present invention;
fig. 8 is a schematic diagram of the ultrasonic loading module loading and detection control system of the present invention.
In the figure: 1. a vibration isolation base; 2. a support frame; 3. an ultrasonic loading module; 4. a hydraulic loading module; 5. a tension loading module; 6. an ultrasonic flaw detection module; 7. a column; 8. a hydraulic cylinder connecting plate; 9. an upper support plate; 10. connecting blocks; 11. a vibration isolation platform; 12. a marble base; 13. an amplitude transformer; 14. an ultrasonic connecting plate; 15. a dowel bar; 16. a connecting plate; 17. an ultrasonic transducer; 18. an ultrasonic connector; 19. ultrasonically bending a pressure head; 20. expanding and tightening the sleeve; 21. a hydraulic valve plate; 22. an accumulator; 23. a hydraulic cylinder protective sleeve; 24. a high-frequency servo hydraulic cylinder; 25. a hydraulic conduit; 26. a hydraulic flange plate; 27. a pull pressure sensor; 28. A servo motor; 29. a coupling; 30. a lead screw seat a; 31. a Y moving platform; 32. a pin-through stretch bending composite clamp; 33. ultrahigh frequency bending fatigue test samples; 34. a lead screw seat b; 35. a slider; 36. a sample centering mechanism; 37. a lead screw a; 38. dovetail-type guide rails; 39. an X moving platform; 40. a precision linear guide rail; 41. a base; 42. bending the composite load fatigue test sample; 43. a pin; 44. a clamp body; 45. a spline housing; 46. a lead screw d; 47. connecting blocks a; 48. axial positioning blocks; 49. a sample supporting seat; 50. a lead screw supporting seat a; 51. an adjusting knob a; 52. a lead screw positioning sleeve; 53. a lead screw b; 54. a lead screw c; 55. an adjusting knob b; 56. a supporting seat; 57. connecting blocks b; 58. positioning blocks; 59. a guide rail; 60. an adjusting knob c; 61. lead screw supporting seat b.
Detailed Description
The details of the present invention and its embodiments are further described below with reference to the accompanying drawings.
Referring to fig. 1 to 8, the device for testing the fatigue mechanical properties of the material under the tensile-bending composite load can realize span-range loading of frequency (high frequency: 0 ~ 100Hz, ultrahigh frequency: 20 kHz) and load (0 ~ 20 kN), can realize ultrahigh frequency bending fatigue loading and tensile-bending static-dynamic composite load loading, can ensure accurate centering of a tested material sample, can perform high-frequency fatigue test under static-dynamic composite load on tested material samples of different materials and different sizes, and provides a reliable means for service performance analysis of key materials in aerospace and various fields, and comprises a vibration isolation base 1, a supporting frame 2, an ultrasonic loading module 3, a hydraulic loading module 4, a tensile loading module 5 and an ultrasonic flaw detection module 6, wherein the supporting frame 2 is connected with the vibration isolation base 1 through a thread, the hydraulic loading module 4 is connected with the supporting frame 2 through a connecting flange, so that high-frequency bending fatigue loading of the tested material sample is realized, the ultrasonic loading module 3 is connected with the hydraulic loading module 4 through a thread, so that the high-frequency bending fatigue loading of the tested material is realized through the connection of the hydraulic loading module, the ultrahigh frequency bending loading module is connected with the vibration isolation module, the ultrasonic loading module is capable of realizing high-bending loading, and realizing high-frequency bending loading, and realizing the static-bending loading of the static-bending fatigue test under the ultrahigh frequency bending loading, and the static-bending test of the traditional tensile-bending test under the ultrahigh frequency bending test, and the static-bending test of the static-bending test.
Referring to fig. 2, the vibration isolation base 1 and the supporting frame 2 of the present invention are mainly composed of a vertical column 7, a hydraulic cylinder connecting plate 8, an upper supporting plate 9, a connecting block c10, a vibration isolation platform 11, and a marble base 12. Wherein, vibration isolation platform 11 is connected with marble base 12 through the screw thread, and stand 7 links to each other with marble base 12 through terminal screw thread, goes up backup pad 9 and links to each other with the stand through the screw, and connecting block c10 is fixed on stand 7, and hydraulic cylinder connecting plate 8 passes through the screw connection with connecting block c 10. Mainly to achieve stable support of the device and to provide effective vibration isolation during testing.
Referring to fig. 3, the ultrasonic loading module 3 of the present invention mainly comprises an amplitude transformer 13, an ultrasonic connecting plate 14, a dowel bar 15, a connecting plate 16, an ultrasonic transducer 17, an ultrasonic connector 18, and an ultrasonic bending ram 19. Wherein, the ultrasonic connector 18 is connected with the ultrasonic transducer 17 through a stud, the amplitude transformer 13 is connected with the ultrasonic connector 18 through a stud, and the ultrasonic bending pressure head 19 is connected with the amplitude transformer 13 through a stud. The ultrasonic connecting plate 14 is fixed at the shaft shoulder of the ultrasonic connector 18, one end of the dowel bar 15 is connected with the connecting plate 16 through the screw thread at the tail end of the dowel bar, and the other end of the dowel bar penetrates through the through hole in the ultrasonic connecting plate 14 and is fixed through a nut. When the ultrasonic loading module works, the 50 Hz electric signal provided by the power supply is converted into a 20kHz electric signal by the ultrasonic frequency generator, the same-frequency mechanical vibration signal is converted by the ultrasonic transducer 17, the ultrahigh frequency (20 kHz) bending fatigue loading of the ultrahigh frequency bending fatigue sample 33 is finally realized by the ultrasonic bending pressure head 19 through two-stage amplification of the ultrasonic connector 18 and the amplitude transformer 13.
Referring to fig. 4, the utility model discloses a hydraulic loading module 4 mainly comprises expansion sleeve 20, hydraulic valve plate 21, energy storage 22, pneumatic cylinder protective sheath 23, high frequency servo pneumatic cylinder 24, hydraulic pipeline 25, hydraulic flange 26, draw pressure sensor 27, wherein, energy storage 22, hydraulic pipeline 25 and hydraulic valve plate 21 link to each other, hydraulic valve plate 21 passes through the bolt and is connected with high frequency servo pneumatic cylinder 24, pneumatic cylinder protective sheath 23 and the end of high frequency servo pneumatic cylinder 24 pass through the bolt fastening, hydraulic flange 26 and the end of stretching out of the piston rod of high frequency servo pneumatic cylinder 24 pass through the bolted connection, the end of expanding sleeve 20 one end links to each other with the end of the piston rod of high frequency servo pneumatic cylinder 24, the other end links to draw pressure sensor 27, when hydraulic loading module during operation, the high-pressure oil that exports from the oil source passes through the filter, energy storage 22 gets into the hydraulic servo valve, simultaneously, the given electric signal of automatically controlled system is compared with the feedback signal that exports from drawing pressure sensor 27, and send into the electric hydraulic servo valve after amplifying this difference, turn into the electric signal of high pressure oil flow, high pressure oil inputs to the high frequency servo pneumatic cylinder 24 lower extreme, the drive piston motion, the sample is transferred to the static bending of high frequency bending test piece 350 or the loading (the bending).
Referring to fig. 5, the tensile loading module 5 of the present invention is mainly used to realize the accurate centering and tensile loading of the tested material sample. It comprises the following components: the device comprises a servo motor (comprising a speed reducer) 28, a coupler 29, a screw rod seat 30, a Y-shaped moving platform 31, a pin-penetrating type stretch bending composite clamp 32, the screw rod seat 30, a slide block 35, a sample centering mechanism 36, a screw rod a37, a dovetail-shaped guide rail 38, an X-shaped moving platform 39, a precise linear guide rail 40 and a base 41. The servo motor 28 is fixed by a motor fixing plate, and is connected with a lead screw a37 fixed on a lead screw seat a30 and a lead screw seat b34 through a coupler 29, and the lead screw seat a30 and the lead screw seat b34 are fixed on the base 41 through bolts. The slide block 35 is assembled with the precision linear guide 40 and fixed to the base 41 by a hexagon socket head cap screw. The Y moving platform 31 is assembled with a dovetail guide rail 38, the dovetail guide rail 38 is fixed on the X moving platform 39 through bolts, and the X moving platform 39 is connected with the sliding block 35 through screws. The pin-penetrating type stretch-bending composite clamp 32 and the sample centering mechanism 36 are connected with the Y moving platform 31 through bolts, and the two modules can be switched by manually adjusting the Y moving platform 31. When the tensile loading module works, the servo motor 28 outputs torque to the screw 37 through the coupler 29 to drive the X moving platform 39 to move in the reverse direction, so that accurate centering and static tensile loading of a tested material sample can be realized.
Referring to fig. 6, the pin-through stretch-bending composite fixture 32 of the present invention mainly comprises a stretch-bending composite load fatigue specimen 42, a pin 43, and a fixture body 44. The pin 43 penetrates through the through holes in the bending composite load fatigue test specimen 42 and the clamp body 44 and is fixed through a nut, and the pin is mainly used for providing clamping and supporting functions for the bending composite load fatigue test specimen 42.
Referring to fig. 7, the sample centering mechanism 36 of the present invention is mainly used for precisely centering the bending fatigue test sample 33. It comprises the following components: spline housing 45, lead screw d46, connecting block a47, axial locating piece 48, sample supporting seat 49, lead screw supporting seat 50, adjusting knob a51, lead screw locating sleeve 52, lead screw b53, lead screw c54, adjusting knob b55, supporting seat 56, connecting block b57, locating piece 58, guide rail 59, adjusting knob c60, lead screw supporting seat b 61. The screw rod c54 is arranged on a connecting block a47 and a connecting block b57, the supporting seat 56 is fixed on the connecting block a47 and the connecting block b57 through screws, the screw rod positioning sleeve 52 is fixed at two ends of the screw rod c54, the adjusting knob b55 is fixed at the tail end of the screw rod c54, the sample supporting seat 49 is fixed on the connecting block a47 through screws, the axial positioning block 48 is assembled with the screw rod c54, and the guide rail 59 is fixed on the connecting block b57 and the screw rod supporting seat 61. The lead screw d46 and the lead screw c54 are respectively fixed on the lead screw supporting seat a50 and the lead screw supporting seat b61, and the spline sleeve 45 is assembled with the lead screw d46 and the lead screw c 54. The adjusting knob c60 is connected with the tail end of the lead screw c54, the positioning block 58 is assembled with the guide rail 59 and the lead screw c54, and the two adjusting knobs a51 are respectively connected with the two positioning blocks 58. When the sub-module of the sample centering mechanism works, the servo motor 28 outputs torque to the lead screw d46 through the coupler 29, drives the X moving platform 39 to move oppositely, rotates the adjusting knob a51, drives the lead screw b53 and the lead screw c54 (the rotation directions of the two are opposite), drives the two positioning blocks 58 to move oppositely, and completes coarse adjustment and fine adjustment of centering a tested material sample in the length direction; and the adjusting knob b55 is rotated to drive the screw b53 to rotate, and the two axial positioning blocks 48 are driven to move oppositely, so that the ultrahigh frequency bending fatigue sample 33 is accurately centered in the width direction.
The above description is only a preferred example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made to the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The device for testing the fatigue mechanical property of the material under the tension-bending composite load is characterized in that: the device integrally adopts four-column vertical symmetrical arrangement and comprises a vibration isolation base (1), a supporting frame (2), an ultrasonic loading module (3), a hydraulic loading module (4), a tensile loading module (5) and an ultrasonic flaw detection module (6), wherein the supporting frame (2) is connected with the vibration isolation base (1) through threads, the hydraulic loading module (4) is connected with the supporting frame (2) through a connecting flange, the ultrasonic loading module (3) is connected with the hydraulic loading module (4) through threads, the tensile loading module (5) is arranged on the vibration isolation base (1), and the ultrasonic flaw detection module (6) is arranged on the vibration isolation base (1).
2. The device for testing the fatigue mechanical properties of the material under the tension-bending composite load according to claim 1, wherein: the vibration isolation base (1) is characterized in that: the vibration isolation platform (11) is connected with the marble base (12) through screws; braced frame (2) adopt four post vertical structures, go up backup pad (9) and link to each other with four stands (7) through the screw, stand (7) link to each other with vibration isolation base (1) through the screw, connecting block c (10) are fixed on stand (7), link to each other with hydraulic connecting plate (8) through the screw, realize the stable support to the device.
3. The device for testing the fatigue mechanical properties of the material under the tension-bending composite load according to claim 1 is characterized in that the hydraulic loading module (4) has the functions of static bending loading and high-frequency bending fatigue loading, static bending loading or 0 ~ 100Hz high-frequency bending fatigue loading of a tested material sample is realized, the energy accumulator (22) and the hydraulic pipeline (25) are connected with the hydraulic valve plate (21), the hydraulic valve plate (21) is connected with the high-frequency servo hydraulic cylinder (24), the hydraulic cylinder protective sleeve (23) is fixed with the tail end of the high-frequency servo hydraulic cylinder (24) through a bolt, the hydraulic flange plate (26) is connected with the extending end of the piston rod of the high-frequency servo hydraulic cylinder (24) through a bolt, one end of the expansion sleeve (20) is connected with the tail end of the piston rod of the high-frequency servo hydraulic cylinder (24), and the other end of the expansion sleeve.
4. The device for testing the fatigue mechanical properties of the material under the tension-bending composite load according to claim 1, wherein: the ultrasonic loading module (3) is connected with the hydraulic loading module (4) through a connecting plate (16) to realize the 20kHz ultrahigh frequency bending fatigue loading of an ultrahigh frequency bending fatigue sample (33); the ultrasonic connector (18) is connected with the ultrasonic transducer 17, the amplitude transformer (13) is connected with the ultrasonic connector (18), and the ultrasonic bending pressure head (19) is connected with the amplitude transformer (13); an ultrasonic connecting plate (14) is fixed at the shaft shoulder of an ultrasonic connector (18), one end of a dowel bar (15) is connected with a connecting plate (16), and the other end of the dowel bar penetrates through a through hole in the ultrasonic connecting plate (14) and is fixed through a nut.
5. The device for testing the fatigue mechanical properties of the material under the tension-bending composite load according to claim 1, wherein: the tensile loading module (5) comprises a sample centering mechanism (36) and a through pin type stretch bending composite clamp (32) which are used for respectively realizing accurate centering and static tensile/compressive loading on a tested material sample; the sample centering mechanism (36) and the pin-penetrating type stretch bending composite clamp (32) are both arranged on the Y moving platform (31), and the quick switching of the two sub-modules of the sample centering mechanism (36) and the pin-penetrating type stretch bending composite clamp (32) is completed by manually moving the Y moving platform (31).
6. The device for testing the fatigue mechanical properties of the material under the tension-bending composite load according to claim 1 or 5, wherein: the tensile loading module (5) is as follows: the servo motor (28) is fixed through a motor fixing plate and is connected with a lead screw a (37) fixed on a lead screw seat a (30) and a lead screw seat b (34) through a coupler (29), and the lead screw seat a (30) and the lead screw seat b (34) are fixed on a base (41) through bolts; the slide block (35) is assembled with the precise linear guide rail (40) and is fixed on the base (41); the Y-shaped moving platform (31) is assembled with a dovetail guide rail (38), the dovetail guide rail (38) is fixed on the X-shaped moving platform (39), and the X-shaped moving platform (39) is connected with the sliding block (35); when the tensile loading module (5) works, the servo motor (28) outputs torque to the lead screw a (37) through the coupler (29) to drive the X moving platform (39) to move in the reverse direction, so that accurate centering and static tensile loading of a tested material sample are realized.
7. The device for testing the fatigue mechanical properties of the material under the tension-bending composite load according to claim 5, wherein: the sample centering mechanism (36) is: the device comprises a screw rod c (54), a support seat (56), a screw rod positioning sleeve (52), a sample support seat (49), a guide rail (59), a guide rail and a guide rail, wherein the screw rod c (54) is arranged on a connecting block a (47) and a connecting block b (57), the support seat (56) is fixed on the connecting block a (47) and the connecting block b (57), the screw rod positioning sleeve (52) is fixed at two ends of the screw rod c (54), an adjusting knob b (55) is fixed at the tail end of the screw rod c (54), the sample support seat (49) is fixed on the connecting block a (47), an axial positioning block (48); the lead screw d (46) and the lead screw c (54) are respectively fixed on the lead screw supporting seat a (50) and the lead screw supporting seat b (61), and the spline sleeve (45) is assembled with the lead screw d (46) and the lead screw c (54); the adjusting knob c (60) is connected with the tail end of the lead screw c (54), the positioning block (58) is assembled with the guide rail (59) and the lead screw c (54), and the two adjusting knobs a (51) are respectively connected with the two positioning blocks (58).
8. The device for testing the fatigue mechanical properties of the material under the tension-bending composite load according to claim 1, wherein: the ultrasonic flaw detection module (6) is arranged on the vibration isolation base (1), and an ultrasonic probe of the ultrasonic flaw detection module (6) is held by hand to scan the surface of the ultrahigh frequency bending fatigue sample (33) during testing, so that in-situ monitoring of the surface fatigue cracks of the ultrahigh frequency bending fatigue sample (33) in the testing process is realized.
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| CN201920307102.6U CN209878482U (en) | 2019-03-12 | 2019-03-12 | Device for testing fatigue mechanical properties of material under tensile-bending composite load |
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| CN201920307102.6U CN209878482U (en) | 2019-03-12 | 2019-03-12 | Device for testing fatigue mechanical properties of material under tensile-bending composite load |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109883833A (en) * | 2019-03-12 | 2019-06-14 | 吉林大学 | Fatigue of materials Mechanics Performance Testing apparatus and method under stretching-bending combined load |
| CN111855413A (en) * | 2020-08-11 | 2020-10-30 | 上海交通大学 | Tensile-bending coupling strength test system for composite material fan blade root element grade test sample |
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| CN113820212A (en) * | 2021-09-23 | 2021-12-21 | 浙江大学 | Mechanics experimental system of softwood material under high hydrostatic pressure environment |
| CN114544332A (en) * | 2022-03-03 | 2022-05-27 | 重庆科技学院 | Dynamic mechanical analysis system for simultaneously loading thermal power and electricity |
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2019
- 2019-03-12 CN CN201920307102.6U patent/CN209878482U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883833A (en) * | 2019-03-12 | 2019-06-14 | 吉林大学 | Fatigue of materials Mechanics Performance Testing apparatus and method under stretching-bending combined load |
| CN109883833B (en) * | 2019-03-12 | 2024-04-30 | 吉林大学 | Device and method for testing fatigue mechanical properties of material under tensile-bending composite load |
| CN111855413A (en) * | 2020-08-11 | 2020-10-30 | 上海交通大学 | Tensile-bending coupling strength test system for composite material fan blade root element grade test sample |
| CN113358487A (en) * | 2021-06-06 | 2021-09-07 | 吉林大学 | Device and method for testing high-temperature low-cycle fatigue performance of rotor blade |
| CN113358487B (en) * | 2021-06-06 | 2022-11-04 | 吉林大学重庆研究院 | Device and method for testing high-temperature low-cycle fatigue performance of rotor blade |
| CN113820212A (en) * | 2021-09-23 | 2021-12-21 | 浙江大学 | Mechanics experimental system of softwood material under high hydrostatic pressure environment |
| CN114544332A (en) * | 2022-03-03 | 2022-05-27 | 重庆科技学院 | Dynamic mechanical analysis system for simultaneously loading thermal power and electricity |
| CN114544332B (en) * | 2022-03-03 | 2024-01-16 | 重庆科技学院 | Dynamic mechanical analysis system for simultaneous loading of thermoelectric power |
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