CN109765104B - Test piece deformation measurement auxiliary system in compression test - Google Patents
Test piece deformation measurement auxiliary system in compression test Download PDFInfo
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- CN109765104B CN109765104B CN201910201185.5A CN201910201185A CN109765104B CN 109765104 B CN109765104 B CN 109765104B CN 201910201185 A CN201910201185 A CN 201910201185A CN 109765104 B CN109765104 B CN 109765104B
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- 238000012360 testing method Methods 0.000 title claims abstract description 68
- 238000012669 compression test Methods 0.000 title claims abstract description 19
- 238000005259 measurement Methods 0.000 title abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 abstract description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The invention discloses a test piece deformation measurement auxiliary system in a compression test, which comprises an upper device, a lower device and a fixing bolt, wherein the upper device is connected with the lower device; the upper device comprises an upper constraint frame and an upper positioning device; the upper constraint frame is provided with a bolt hole, the upper positioning device is provided with a bolt, and the upper constraint frame is connected with the upper positioning device through the bolt; the lower device comprises a lower constraint frame and a lower positioning device, wherein the lower constraint frame is provided with a bolt hole, the lower positioning device is provided with a bolt, and the lower constraint frame is connected with the lower positioning device through the bolt and the bolt hole. The auxiliary system for measuring the deformation of the test piece in the compression test is simple in form, convenient to install and free of professional tools; the test device is suitable for tests of test pieces with circular cross sections and square cross sections of various sizes; the auxiliary system for measuring the deformation of the test piece in the compression test is fixed with the test piece by a spring, belongs to flexible contact, and can avoid the extrusion deformation damage of the auxiliary device when the test piece is damaged.
Description
Technical Field
The invention relates to the field of civil engineering experiments, in particular to a test piece deformation measurement auxiliary system in a compression test.
Background
In material compression and structural member compression tests, it is often necessary to measure the deformation of a test specimen during an increase in load, and to analyze the ductility and deformability of the test specimen. There are many types of displacement meters that measure deformation in the market: LVDT, laser displacement meter, stay wire type displacement meter, needle type displacement meter etc. do not have general auxiliary device when the application displacement meter of different grade type measures sample deformation, all are a test customization alone one set of auxiliary device to the sample is pressed and can be expanded extrusion auxiliary device in the test process, leads to displacement measurement auxiliary device disability rate very high, sometimes causes the damage of displacement meter even.
Thus, a new type of device is found which has the following characteristics: deformation measurement auxiliary systems which are universally applicable, simple in structure, scientific in design and convenient to install are necessary.
Disclosure of Invention
The invention aims to: aiming at the defects in the prior art, the invention aims to provide a test piece deformation measurement auxiliary system in a compression test, which has the characteristics of universal applicability, simple structure, scientific design, convenient installation and the like.
The technical scheme is as follows: in order to achieve the above object, the present invention adopts the following technical scheme:
a test piece deformation measurement auxiliary system in a compression test comprises an upper device, a lower device and a fixing bolt; the upper device comprises an upper constraint frame and two upper positioning devices; the lower device comprises a lower constraint frame and two lower positioning devices.
The upper constraint frame is octagonal, and four long sides and four short sides are formed: two symmetrical bolt holes are formed in two sides of the four long side surfaces and are used for completing a square section test piece test; when the test of the square-section test piece is finished, eight fixing bolts penetrate through the symmetrical screw holes on the long side to contact with the test piece; the middle parts of the four short side surfaces are respectively provided with a bolt hole for completing a test piece with a circular cross section, and when the test piece with the circular cross section is completed, four fixing bolts penetrate through the short side bolt holes to contact with a sample; a rectangular level bubble is arranged in the middle of the top surfaces of the four long sides and used for confirming the installation level of the upper constraint frame.
The upper positioning device is characterized in that a screw rod is welded at the end part of the horizontal steel plate.
The lower constraint frame is octagonal, and four long sides and four short sides are formed: two symmetrical bolt holes are formed in two sides of the four long side surfaces and are used for completing a square section test piece test, and eight fixing bolts penetrate through the symmetrical bolt holes in the long side to contact with a test piece when the square section test piece test is completed; the middle parts of the four short side surfaces are respectively provided with a bolt hole for completing a test piece with a circular cross section, and when the test piece with the circular cross section is completed, four fixing bolts penetrate through the short side bolt holes to contact with a sample; a rectangular level bubble is arranged in the middle of the top surfaces of the four long sides and used for confirming the installation level of the upper constraint frame.
The lower positioning device is characterized in that a screw is welded at the middle part of one side of a vertical steel plate, two round rods are welded with a 'mesh' -shaped limiting device at the other side of the vertical steel plate, a fixed point is respectively arranged between two long rods of the 'mesh' -shaped limiting device, two ends of the fixed point are respectively connected with one end of a spring, the spring is sleeved on the long rods and used for limiting the position of the long rods of a measuring instrument and fixing the position, the other end of the spring is connected with a short cross rod in the middle of the 'mesh' -shaped limiting device, the short cross rod is a screw, and two nuts are uniformly distributed on each short cross rod and used for limiting the position of the short cross rod of the measuring instrument and fixing the position.
The fixing bolt is formed by welding a spring at the end part of a screw rod.
The beneficial effects are that: the auxiliary system for measuring the deformation of the test piece in the compression test is simple in form, convenient to install and free of professional tools; the test device is suitable for tests of test pieces with circular cross sections and square cross sections of various sizes; the auxiliary system for measuring the deformation of the test piece in the compression test is fixed with the test piece by a spring, belongs to flexible contact, and can avoid the extrusion deformation damage of the auxiliary device when the test piece is damaged.
Drawings
FIG. 1 is a schematic diagram of a test piece deformation measurement auxiliary system in a compression test;
FIG. 2 is a schematic diagram of an upper and lower restraint frame;
FIG. 3 is a schematic view of an upper positioning device;
FIG. 4 is a schematic view of a lower positioning device;
fig. 5 is a schematic view of a fixing bolt.
Detailed Description
The invention will be further illustrated with reference to specific examples.
As shown in fig. 1, the test piece deformation measurement auxiliary system in the compression test comprises an upper device (1), a lower device (2) and a fixing bolt, wherein the upper device (1) comprises an upper constraint frame (1-1), a first upper positioning device (1-2-1) and a second upper positioning device (1-2-2); the lower device (2) comprises a lower restraint frame (2-1), a first lower positioning device (2-2-1) and a second lower positioning device (2-2-2).
The auxiliary system for measuring the deformation of the test piece in the compression test is characterized in that an upper constraint frame (1-1) is processed into an octagon with four long sides and four short sides, two symmetrical bolt holes are respectively formed in two sides of the four long sides, a bolt hole is formed in the middle of the sides of the four short sides, a rectangular level bubble is respectively arranged in the middle of the top of the four long sides, finally a positioning screw hole is formed in the middle of the sides of the two symmetrical long sides, the symmetrical screw holes of the long sides are used for penetrating through fixing bolts, the square test piece is fixed, and the screw holes of the short sides are used for penetrating through the fixing bolts to fix the round test piece. The long side positioning screw hole is used for being connected with the first upper positioning device (1-2-1) and the second upper positioning device (1-2-2). The first upper positioning device (1-2-1) and the second upper positioning device (1-2-2) are formed by welding screws by using steel plates. The lower constraint frame (2-1) is processed into an octagon with four long sides and four short sides, two symmetrical bolt holes are respectively formed in two sides of the four long sides, a bolt hole is formed in the middle of each of the four short sides, a rectangular level bubble is respectively arranged in the middle of the top surfaces of the four long sides, finally a positioning screw hole is respectively formed in the middle of each of the two symmetrical long sides, the symmetrical screw holes of the long sides are used for penetrating through fixing bolts, square test pieces are fixed, and the screw holes of the short sides are used for penetrating through the fixing bolts and fixing round test pieces. The positioning screw hole on the long side is used for being connected with a second lower positioning device (2-2-2). The second lower positioning device (2-2-2) is characterized in that a screw is welded on one side of the steel plate, the other side of the steel plate is welded on two sides of the longitudinal side of the 'mesh' -shaped limiting device through two round rods, fixed points are respectively arranged between the two longitudinal sides and used for fixing one end of a spring, the other end of the spring is connected with the middle transverse short side, thus the displacement measuring device can be fixed on the middle part of the long side of the 'mesh' -shaped limiting device, the middle transverse short side is made of the screw, and two bolts are respectively arranged on the two screws and used for fixing the displacement measuring device in the direction of the transverse short side.
The superstructure of the present invention is connected to the substructure. The advantages are that: the auxiliary system for measuring the deformation of the test piece in the compression test is universally applicable to deformation measurement tests of various displacement measuring devices, has simple form and convenient installation, and does not need professional tools; the test device is suitable for tests of test pieces with circular cross sections and square cross sections of various sizes; the auxiliary system for measuring the deformation of the test piece in the compression test is fixed with the test piece by a spring, belongs to flexible contact, and can avoid the extrusion deformation damage of the auxiliary device when the test piece is damaged.
Claims (3)
1. The auxiliary system for measuring the deformation of the test piece in the compression test is characterized by comprising an upper device (1), a lower device (2) and a fixing bolt; the upper device (1) comprises an upper constraint frame (1-1), a first upper positioning device (1-2-1) and a second upper positioning device (1-2-2); the lower device (2) comprises a lower constraint frame (2-1), a first lower positioning device (2-2-1) and a second lower positioning device (2-2-2); the upper constraint frame (1-1) is octagonal, and four long sides and four short sides are formed: two symmetrical bolt holes are formed in two sides of the four long side surfaces, a bolt hole is formed in the middle of each of the four short side surfaces, a rectangular level bubble is formed in the middle of the top surface of each of the four long side surfaces and used for confirming the installation level of the upper constraint frame (1-1), a positioning screw hole is formed in the middle of each of the two symmetrical long side surfaces and used for being connected with the first upper positioning device (1-2-1) and the second upper positioning device (1-2-2), two symmetrical bolt holes are formed in two sides of each of the four long side surfaces and used for completing a square section test piece test, and eight fixing bolts penetrate through the symmetrical screw holes of the long side and contact with a test piece when the square section test piece test is completed; the middle parts of the four short side surfaces are respectively provided with a bolt hole for completing a test piece with a circular cross section, and when the test piece with the circular cross section is completed, four fixing bolts penetrate through the short side bolt holes to contact with a test piece; the first upper positioning device (1-2-1) is characterized in that a screw rod is welded at the end part of a horizontal steel plate; the second upper positioning device (1-2-2) is characterized in that a screw rod is welded at the end part of the horizontal steel plate; the lower constraint frame (2-1) is octagonal, and four long sides and four short sides are formed: two symmetrical bolt holes are formed in two sides of the four long side surfaces, a bolt hole is formed in the middle of each of the four short side surfaces, a rectangular level bubble is formed in the middle of the top surface of each of the four long side surfaces and used for confirming the installation level of the lower constraint frame (2-1), a positioning screw hole is formed in the middle of each of the two symmetrical long side surfaces and used for being connected with the first lower positioning device (2-2-1) and the second lower positioning device (2-2-2), two symmetrical bolt holes are formed in two sides of each of the four long side surfaces and used for completing a square section test piece, eight fixing bolts penetrate through the symmetrical screw holes of the long side and are in contact with a sample when the square section test piece is completed, a bolt hole is formed in the middle of each of the four short side surfaces and used for completing a round section test piece, and four fixing bolts penetrate through the bolt holes and are in contact with the sample when the round section test piece is completed; the first lower positioning device (2-2-1) is characterized in that a screw is welded at the middle part of one side of a vertical steel plate, the other side of the vertical steel plate is welded with a 'mesh' -shaped limiting device through two round rods, a fixed point is respectively arranged between two long rods of the 'mesh' -shaped limiting device, two ends of the fixed point are respectively connected with one end of a spring, the spring is sleeved on the long rods, the other end of the spring is connected with a short cross rod in the middle of the 'mesh' -shaped limiting device, the short cross rod is a screw, and two nuts are uniformly distributed on each short cross rod; the second lower positioning device (2-2-2) is characterized in that a screw is welded at the middle part of one side of a vertical steel plate, the other side of the vertical steel plate is welded with a 'mesh' -shaped limiting device through two round rods, a fixed point is respectively arranged between two long rods of the 'mesh' -shaped limiting device, two ends of the fixed point are respectively connected with one end of a spring, the spring is sleeved on the long rods, the other end of the spring is connected with a short cross rod in the middle of the 'mesh' -shaped limiting device, the short cross rod is a screw, and two nuts are uniformly distributed on each short cross rod; the fixing bolt is formed by welding a spring at the end part of a screw rod; the displacement measuring instrument is fixed between the two long rods of the 'mesh' -shaped limiting device.
2. The auxiliary system for measuring deformation of a test piece in a compression test according to claim 1, wherein the 'mesh' type limiting device on the first lower positioning device (2-2-1) is characterized in that springs sleeved on two long rods are used for limiting and fixing the position of the displacement measuring instrument in the long rod direction, and nuts on a short transverse rod are used for limiting and fixing the position of the displacement measuring instrument in the short transverse rod direction; the displacement measuring instrument is a displacement meter for measuring displacement in the market, and can be used for being mounted on the first lower positioning device (2-2-1).
3. The auxiliary system for measuring deformation of a test piece in a compression test according to claim 1, wherein the second lower positioning device (2-2-2) is provided with a 'mesh' -shaped limiting device, springs sleeved on two long rods are used for limiting the position of the displacement measuring instrument in the long rod direction and fixing, and nuts on a short cross rod are used for limiting the position of the displacement measuring instrument in the short cross rod direction and fixing; the displacement measuring instrument is a displacement meter for measuring displacement in the market, and can be used for being mounted on the second lower positioning device (2-2-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910201185.5A CN109765104B (en) | 2019-03-15 | 2019-03-15 | Test piece deformation measurement auxiliary system in compression test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910201185.5A CN109765104B (en) | 2019-03-15 | 2019-03-15 | Test piece deformation measurement auxiliary system in compression test |
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| CN109765104A CN109765104A (en) | 2019-05-17 |
| CN109765104B true CN109765104B (en) | 2024-01-30 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005221275A (en) * | 2004-02-04 | 2005-08-18 | Taisei Corp | Test piece restraining device |
| CN102636394A (en) * | 2012-05-08 | 2012-08-15 | 中国建筑材料科学研究总院 | Compressive stress loading and deformation measurement device and measurement method for deformation of test piece under compressive stress |
| CN103592184A (en) * | 2013-11-11 | 2014-02-19 | 华北电力大学 | Static compression/tensile elastic modulus test device for cement-based materials |
| CN105823584A (en) * | 2016-03-13 | 2016-08-03 | 北京工业大学 | Apparatus for measuring concrete shearing strength by using single-shearing-plane Z-shaped test piece method |
| CN105891012A (en) * | 2016-03-30 | 2016-08-24 | 西华大学 | Portable shearing device |
| CN206990339U (en) * | 2017-07-07 | 2018-02-09 | 青岛科技大学 | A kind of During Geotechnical Tests test specimen radial displacement measurement apparatus |
| CN210719947U (en) * | 2019-03-15 | 2020-06-09 | 南京林业大学 | Test piece deformation measurement auxiliary device in compression test |
-
2019
- 2019-03-15 CN CN201910201185.5A patent/CN109765104B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005221275A (en) * | 2004-02-04 | 2005-08-18 | Taisei Corp | Test piece restraining device |
| CN102636394A (en) * | 2012-05-08 | 2012-08-15 | 中国建筑材料科学研究总院 | Compressive stress loading and deformation measurement device and measurement method for deformation of test piece under compressive stress |
| CN103592184A (en) * | 2013-11-11 | 2014-02-19 | 华北电力大学 | Static compression/tensile elastic modulus test device for cement-based materials |
| CN105823584A (en) * | 2016-03-13 | 2016-08-03 | 北京工业大学 | Apparatus for measuring concrete shearing strength by using single-shearing-plane Z-shaped test piece method |
| CN105891012A (en) * | 2016-03-30 | 2016-08-24 | 西华大学 | Portable shearing device |
| CN206990339U (en) * | 2017-07-07 | 2018-02-09 | 青岛科技大学 | A kind of During Geotechnical Tests test specimen radial displacement measurement apparatus |
| CN210719947U (en) * | 2019-03-15 | 2020-06-09 | 南京林业大学 | Test piece deformation measurement auxiliary device in compression test |
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| CN109765104A (en) | 2019-05-17 |
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