CN114112664A - Constant confining pressure loading experimental device - Google Patents
Constant confining pressure loading experimental device Download PDFInfo
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- CN114112664A CN114112664A CN202111381229.0A CN202111381229A CN114112664A CN 114112664 A CN114112664 A CN 114112664A CN 202111381229 A CN202111381229 A CN 202111381229A CN 114112664 A CN114112664 A CN 114112664A
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- 238000012360 testing method Methods 0.000 claims abstract description 38
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 230000006835 compression Effects 0.000 claims abstract description 17
- 238000007906 compression Methods 0.000 claims abstract description 17
- 238000002474 experimental method Methods 0.000 claims description 16
- 239000011888 foil Substances 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 13
- 230000004044 response Effects 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract description 3
- 239000006261 foam material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000003141 lower extremity Anatomy 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011326 mechanical measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a constant confining pressure loading experimental device which comprises a pressure lever, an outer frame, a sleeve, a base and a strain gauge, wherein the outer frame is provided with an upper panel and a lower bottom plate, the sleeve is vertically arranged on the lower bottom plate through the base, the base is provided with a columnar boss which protrudes upwards and is matched with the lower end of the inner side of the sleeve, a through hole is formed in the upper panel, the pressure lever penetrates through the through hole downwards and is matched with the upper end of the inner side of the sleeve, a limiting mechanism used for limiting the pressure lever to move upwards is arranged between the upper panel and the pressure lever, a sample space is arranged between the lower end of the pressure lever and the upper end of the columnar boss when the pressure lever is in a limiting state, and the strain gauge is arranged on the outer surface of the sleeve and corresponds to the sample space. The invention has wide application and good universality, can test the strength and mechanical response of various materials under composite pressure, and can realize quasi-static or dynamic impact on loading compression.
Description
Technical Field
The invention relates to the technical field of mechanics experiments, in particular to a constant confining pressure loading experimental device.
Background
In the research of materials, the mechanical properties of the materials are important, and the mechanical response under the dynamic compression condition is a key part of the materials. And when various materials are actually acted, the stress mode of the materials is not only the action of uniaxial pressure, but also the mode of simultaneous action of confining pressure and axial pressure.
The confining pressure device in the prior art mainly aims at large hard materials such as rocks and concrete, mainly adopts single-axis or multi-axis axial compression for small materials, and lacks performance measurement under the state of confining pressure of small-scale materials, also lacks measurement of confining pressure of materials under an impact state, lacks test of a single-axis compression state under a constant confining pressure state, and lacks mechanical measurement under a state of applying complex stress in advance. However, the conventional confining pressure test is generally static compression, and a test method of performing impact compression under the condition of confining pressure is lacked.
Disclosure of Invention
The invention aims to provide a constant confining pressure loading experimental device to overcome the defects in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a invariable confined pressure loading experimental apparatus, includes depression bar, frame, sleeve, base and foil gage, the frame is equipped with top panel and lower plate, the sleeve passes through the vertical locating of base on the lower plate, the base have make progress protruding and with telescopic inboard lower extreme matched with column boss, be equipped with the via hole on the top panel, the depression bar passes downwards behind the via hole with telescopic inboard upper end cooperatees, the top panel with be equipped with between the depression bar and be used for the restriction depression bar rebound's stop gear, and when the depression bar is in limit state, the lower extreme of depression bar with be equipped with the sample space between the upper end of column boss, the foil gage is located telescopic surface and with the sample space is corresponding.
Further, the limiting mechanism is a fixed limiting mechanism, when the fixed limiting mechanism limits the pressure rod, the height size of the sample space is not adjustable, and the pressure rod is used for providing initial confining pressure for the test piece to fix pre-compression amount.
Furthermore, the fixed limiting mechanism comprises a clamping block arranged on the outer wall of the pressure rod and a clamping groove arranged in the through hole of the upper panel; the joint piece with the joint groove is relative from top to bottom, will the joint piece is followed depression bar downstream and pass the joint groove, later with the joint piece with the joint groove staggers mutually, in order to restrict depression bar upward movement.
Further, the joint piece is a plurality of, and a plurality of joint pieces are even to be located on the depression bar outer wall, the joint groove is a plurality of, just the quantity of joint piece with the quantity in joint groove is unanimous.
Furthermore, the clamping groove is a notch formed in the inner wall of the through hole.
Furthermore, the limiting mechanism is a movable limiting mechanism, when the movable limiting mechanism limits the pressure rod, the height of the sample space is adjustable, and the pressure rod provides initial confining pressure for the test piece, wherein the initial confining pressure can adjust the pre-compression amount.
Further, activity stop gear includes adjusting nut and locates joint piece on the depression bar outer wall, adjusting nut is equipped with the external screw thread, through downthehole internal thread that is equipped with, adjusting nut passes through external screw thread and internal thread are installed in the downthehole, adjusting nut's central point puts and is equipped with the confession the central hole that the depression bar passes through, through adjusting nut makes adjusting nut's lower extreme with the joint piece is inconsistent in order to restrict the depression bar rebound.
Further, the base still includes circular backing plate, the column boss is located the middle part of circular backing plate, just the lower limb of circular backing plate is equipped with the round step, be equipped with the circular port on the lower plate, the circular port with the step cooperation.
Further, the sleeve is made of foam materials.
Compared with the prior art, the invention has the advantages that: the invention can provide stable confining pressure for the test piece, thereby generating complex stress in the test piece to carry out corresponding loading test, the invention has wide application and good universality, can test the strength and mechanical response of various materials under composite pressure, and the loading compression can be quasi-static or dynamic impact; in addition, the invention has simple structure, is economical and practical, can adjust the size of the adopted components according to the requirements, can read confining pressure data through the strain gauge external circuit, is very visual and is convenient to operate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an example of a constant confining pressure loading experimental apparatus according to the present invention.
FIG. 2 is a cross-sectional view of the constant confining pressure loading experimental apparatus shown in FIG. 1 according to the present invention;
FIG. 3 is a schematic view of the construction of the sleeve of the present invention;
FIG. 4 is a schematic view of the construction of the strut of the present invention;
FIG. 5 is a schematic view of the structure of the base of the present invention;
FIG. 6 is a schematic structural diagram of another example of the constant confining pressure loading experimental apparatus according to the present invention;
FIG. 7 is a cross-sectional view of the constant confining pressure loading experiment apparatus shown in FIG. 6 according to the present invention.
In the figure: the device comprises a pressure lever 1, an adjusting nut 2, an outer frame 3, an upper panel 31, a lower bottom plate 32, a sleeve 4, a base 5, a columnar boss 51, a circular base plate 52, a strain gauge 6, a clamping block 7, a clamping groove 8 and a sample space 9.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
Example one
Referring to fig. 1-5, the embodiment discloses a constant confining pressure loading experimental apparatus, which includes a pressure lever 1, an outer frame 3, a sleeve 4, a base 5 and a strain gauge 6, wherein the outer frame 31 is provided with an upper panel 31 and a lower panel 32, the sleeve 4 is vertically arranged on the lower panel 32 through the base 5, the base 5 is provided with a cylindrical boss 51 protruding upwards and matched with the lower end of the inner side of the sleeve 4, the upper panel 31 is provided with a via hole, the pressure lever 1 downwardly penetrates through the via hole and then is matched with the upper end of the inner side of the sleeve 4, a limiting mechanism for limiting the upward movement of the pressure lever 1 is arranged between the upper panel 31 and the pressure lever 1, when the pressure lever 1 is in a limiting state, a sample space 9 is arranged between the lower end of the pressure lever 1 and the upper end of the cylindrical boss 51, and the strain gauge 6 is arranged on the outer surface of the sleeve 4 and corresponds to the sample space 9.
In this embodiment, the limiting mechanism is a fixed limiting mechanism, when the fixed limiting mechanism limits the pressure lever 1, the upward movement range of the pressure lever 1 relative to the sleeve 4 is limited, the height dimension of the sample space 9 is not adjustable, and the pressure lever 1 provides the initial confining pressure of the fixed precompression amount to the test piece, that is, the initial confining pressure of the fixed precompression amount.
Specifically, the fixed limiting mechanism comprises a clamping block 7 arranged on the outer wall of the pressure lever 1 and a clamping groove 8 arranged in the through hole of the upper panel 31; when the clamping blocks 7 are opposite to the clamping grooves 8 up and down, the clamping blocks 7 can move upwards or downwards along with the pressing rod 1 and penetrate through the clamping grooves 8, and when the clamping blocks 7 are staggered with the clamping grooves 8 and the clamping blocks 7 are attached below the upper panel 31, the pressing rod 1 is limited to move upwards.
Preferably, joint piece 7 is a plurality of, and is a plurality of joint piece 7 evenly sets up around depression bar 1, and joint groove 8 also is a plurality of, and joint piece 7 is the same with joint groove 8 quantity, and a plurality of joint grooves 8 evenly set up around the via hole.
Preferably, the clamping groove 8 is a notch formed in the inner wall of the through hole.
Specifically, base 5 still includes circular backing plate 52, column boss 51 is located the middle part of circular backing plate 52, just the lower limb of circular backing plate 52 is equipped with the round step, be equipped with the circular port on the lower plate 32, the circular port with the step cooperation can fix a position base 5 simultaneously, and under its positioning action, sleeve 4 passes through 5 vertical settings of base in frame 3, can ensure that sleeve 4 upper end is relative with the via hole, can make things convenient for depression bar 1 to insert sleeve 4.
In this embodiment, the sleeve is made of foam materials, including but not limited to aluminum foam, copper foam or ceramic foam, and the sleeve 4 made of foam materials has a platform pressure in a compressed state, so that the pressure can be maintained unchanged, and the pressure of the platform can be adjusted by controlling the porosity and the diameter of the holes of the foam materials. It should be noted that, when the sleeve 4 is made of a common steel material, the sleeve 4 is in a compressed state under a common confining pressure, and therefore, the constant confining pressure loading experimental device of the present invention can also implement a loading test under a common confining pressure.
Example two
Referring to fig. 6 and 7, other structures of the present embodiment are the same as those of the first embodiment, except that: the limiting mechanism of this embodiment is a movable limiting mechanism, and when the movable limiting mechanism limits the pressure lever 1, the height of the sample space 9 is adjustable, and the experimental device is used for providing the initial confining pressure of the adjustable precompression amount for the test piece. During the use, depression bar 1 provides adjustable precompression volume to the test piece to reach and provide stable initial confined pressure for the test piece, can adjust the initial confined pressure of precompression volume.
Specifically, activity stop gear include adjusting nut 2 and locate joint piece 7 on the depression bar outer wall, adjusting nut 2 is equipped with the external screw thread, passes through the downthehole internal thread that is equipped with, adjusting nut 2 passes through the external screw thread is installed at the downthehole with the internal thread, and adjusting nut 2's central point puts and is equipped with the central hole that supplies depression bar 1 to pass through, makes adjusting nut 2's lower extreme and joint piece 7 inconsistent in order to restrict depression bar 1 rebound through adjusting nut 2.
This embodiment is when using, and sample space 9 is used for placing the test piece that height dimension is greater than sample space 9 height, and 1 upper ends of depression bar during the experiment are connected with outside loading device, and the test load passes through depression bar 1 and transmits the test piece, and depression bar 1 carries out axial compression to the test piece, makes the test piece take place radial expansion, because the restraint of sleeve 4, and the test piece extrudees the drum when radial expansion, produces pressure on test piece and drum contact surface, and this pressure is the confined pressure that the test piece received promptly. During the experiment, according to the experimental demand, can carry out the quasi-static compression to depression bar 1, also can carry out the impact compression loading.
The invention can adopt a fixed limit structure and a movable limit structure, when the fixed limit structure limits the pressure lever 1, the height dimension of the sample space 9 is not adjustable, and at the moment, the initial confining pressure of the fixed precompression amount is provided for the test piece; when restricting depression bar 1 for activity limit structure, the height dimension of sample space 9 can be adjusted according to the experiment demand, and at this moment, the initial confined pressure of the adjustable precompression volume of test piece is provided to the realization reaches the prestressing force state that provides before carrying out mechanical test.
The constant confining pressure loading experimental device provided by the invention can mainly provide stable confining pressure for a test piece so as to generate complex stress in the test piece to carry out a corresponding loading test, and has the following advantages: the test method has the advantages that the test method is wide in application and good in universality, the strength and mechanical response of various materials under composite pressure can be tested, and the loading compression can be quasi-static or dynamic impact; and simple structure, economical and practical, the part that the device adopted can adjust the size as required, can read confined pressure data through 6 external circuit of foil gage, directly perceived, the operation of being convenient for.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes or modifications may be made by the patentees within the scope of the appended claims, and within the scope of the invention, as long as they do not exceed the scope of the invention described in the claims.
Claims (9)
1. The utility model provides a invariable confined pressure loading experimental apparatus, its characterized in that, includes depression bar, frame, sleeve, base and foil gage, the frame is equipped with top panel and lower plate, the sleeve passes through the vertical locating of base on the lower plate, the base have make progress protruding and with telescopic inboard lower extreme matched with column boss, be equipped with the via hole on the top panel, the depression bar passes downwards behind the via hole with telescopic inboard upper end cooperatees, the top panel with be equipped with between the depression bar and be used for the restriction the stop gear of depression bar rebound, and when the depression bar is in limit state, the lower extreme of depression bar with be equipped with the sample space between the upper end of column boss, the foil gage is located telescopic surface and with the sample space is corresponding.
2. The constant confining pressure loading experiment device according to claim 1, wherein the limiting mechanism is a fixed limiting mechanism, the height dimension of the sample space is not adjustable when the fixed limiting mechanism limits a pressing rod, and the pressing rod is used for providing initial confining pressure of fixed pre-compression amount to the test piece.
3. The constant confining pressure loading experiment device according to claim 2, wherein the fixed limiting mechanism comprises a clamping block arranged on the outer wall of the pressure rod and a clamping groove arranged in the through hole of the upper panel; the joint piece with the joint groove is relative from top to bottom, will the joint piece is followed depression bar downstream and pass the joint groove, later with the joint piece with the joint groove staggers mutually, in order to restrict depression bar upward movement.
4. The constant confining pressure loading experiment device according to claim 3, wherein the number of the clamping blocks is multiple, the clamping blocks are uniformly arranged on the outer wall of the pressure rod, the number of the clamping grooves is multiple, and the number of the clamping blocks is consistent with the number of the clamping grooves.
5. The constant confining pressure loading experiment device according to claim 3, wherein the clamping groove is a notch formed in the inner wall of the through hole.
6. The constant confining pressure loading experiment device according to claim 1, wherein the limiting mechanism is a movable limiting mechanism, the height dimension of the sample space is adjustable when the pressure rod is limited, and the experiment device is used for providing initial confining pressure with adjustable precompression for a test piece.
7. The constant confining pressure loading experiment device according to claim 6, wherein the movable limiting mechanism comprises an adjusting nut and a clamping block arranged on the outer wall of the pressure rod, the adjusting nut is provided with an external thread, an internal thread is arranged in the through hole, the adjusting nut is installed in the through hole through the external thread and the internal thread, a central hole for the pressure rod to pass through is formed in the central position of the adjusting nut, and the adjusting nut is adjusted to enable the lower end of the adjusting nut to be abutted against the clamping block so as to limit the upward movement of the pressure rod.
8. The constant confining pressure loading experiment device according to claim 1, wherein the base further comprises a circular base plate, the columnar boss is arranged in the middle of the circular base plate, a circle of steps are arranged on the lower edge of the circular base plate, a circular hole is formed in the lower base plate, and the circular hole is matched with the steps.
9. The constant confining pressure loading experiment device according to any one of claims 1 to 8, wherein the sleeve is made of foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111381229.0A CN114112664A (en) | 2021-11-20 | 2021-11-20 | Constant confining pressure loading experimental device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111381229.0A CN114112664A (en) | 2021-11-20 | 2021-11-20 | Constant confining pressure loading experimental device |
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| CN114112664A true CN114112664A (en) | 2022-03-01 |
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| CN202111381229.0A Pending CN114112664A (en) | 2021-11-20 | 2021-11-20 | Constant confining pressure loading experimental device |
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|---|---|---|---|---|
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| CN103760028A (en) * | 2014-01-07 | 2014-04-30 | 洛阳理工学院 | Confining pressure loading device for laboratory rock strength |
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| CN112146986A (en) * | 2020-10-22 | 2020-12-29 | 安徽理工大学 | Passive confining pressure loading device and method for separated Hopkinson pressure bar |
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2021
- 2021-11-20 CN CN202111381229.0A patent/CN114112664A/en active Pending
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|---|---|---|---|---|
| CN203275213U (en) * | 2013-05-20 | 2013-11-06 | 洛阳理工学院 | Portable confining pressure loading device |
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Application publication date: 20220301 |