CN211602743U - Tensile shearing/compression shearing experimental device - Google Patents
Tensile shearing/compression shearing experimental device Download PDFInfo
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- CN211602743U CN211602743U CN201921232575.0U CN201921232575U CN211602743U CN 211602743 U CN211602743 U CN 211602743U CN 201921232575 U CN201921232575 U CN 201921232575U CN 211602743 U CN211602743 U CN 211602743U
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Abstract
The utility model provides a tensile shearing/compression shearing experimental apparatus, include: the first test piece and the second test piece are respectively provided with a first fixing part and a second fixing part for adhering glue, and the first fixing part and the second fixing part can be in separable contact; the fixture is provided with a body and a convex head, the body is provided with a hollow cavity for fixing the first test piece, and the convex head protrudes out of the body for clamping; and the shifting mechanism is arranged on the body of the clamp and moves the horizontal relative positions of the clamping ends of the first test piece and the second test piece by a preset distance so as to test the shearing mechanical property of the adhesive joint under the action of preset tensile force or compression force. The utility model discloses an utilize shift mechanism to change the horizontal relative distance of the exposed core of first test piece and second test piece, realized test material, especially single overlap joint structure glue film, the shearing mechanical properties test under certain tensile force or compressive force effect.
Description
Technical Field
The utility model relates to an experimental apparatus technical field especially relates to a tensile shearing/compression shearing experimental apparatus.
Background
Gluing is one of the main ways of structural attachment. The cementitious properties have a significant impact on the structural strength. At present, most of glue layer performance tests are measured in a pure shearing or pure stretching state, and the existing experimental scheme can only realize the test in the pure shearing or pure stretching/compressing state.
Disclosure of Invention
In view of this, the utility model provides a tensile shearing/compressive shearing experimental apparatus to realize the shearing mechanical properties test of cement under certain tensile force or compressive force effect.
The utility model provides a tensile shearing/compression shearing experimental apparatus, include: the first test piece and the second test piece are respectively provided with a first fixing part and a second fixing part for adhering glue, and the first fixing part and the second fixing part can be in separable contact; the fixture is provided with a body and a convex head, the body is provided with a hollow cavity for fixing the first test piece, and the convex head protrudes out of the body for clamping; and the shifting mechanism is arranged on the body of the clamp and moves the horizontal relative positions of the clamping ends of the first test piece and the second test piece for a preset distance so as to test the shearing mechanical property of the adhesive joint under a preset tensile or compressive load.
Further, the shifting mechanism comprises a shifting piece, a positioning piece and a connector, the shifting piece is movably connected with the body, the connector is detachably connected with the first test piece clamping end, so that the first test piece clamping end and the second test piece clamping end can be moved and fixed through the shifting piece, and the shearing mechanical property of the test piece under a preset tensile or compression load is tested.
Further, the displacement piece penetrates through the top end of the connector, and the horizontal relative positions of the clamping end of the first test piece and the clamping end of the second test piece are moved by moving the connector; the setting element includes first setting element and second setting element, first setting element and second setting element distribute in the both sides of connector, with the cooperation of aversion piece, through removing and fixing the connector removes and fixes the horizontal relative position of the exposed core of first test piece and second test piece.
Furthermore, the shifting part comprises a main screw rod and a main nut, the main screw rod penetrates through the body and the connector, and the main nut fixes the main screw rod on the body; the first positioning piece comprises a positioning pin, the second positioning piece comprises a positioning nut, the positioning pin is fixedly connected with the main screw rod, and the positioning nut is movably connected with the main screw rod; the positioning pin and the positioning nut are respectively fixed on two sides of the first test piece so as to be matched with the displacement piece respectively, and the first test piece is moved and fixed by moving and fixing the connector.
Furthermore, the middle part of the main screw rod is a smooth thread-free area so as to penetrate through the first connecting piece and the second connecting piece in the connector to enable the first test piece to freely droop, so that the tensile direction of the test piece and the axis of the test piece are on the same plane, and the experimental error is reduced.
Further, the clamp has a scale to facilitate mounting and adjustment of the displacement mechanism.
Further, the clamp is also provided with a first chuck and a second chuck, the convex head is clamped by a stretcher through the first chuck, and the stretcher applies shearing force to the to-be-tested adhesive through the first chuck and the second chuck; the first chuck and the second chuck are frustum-shaped, and the cross sections of the first chuck and the second chuck are trapezoidal so as to be convenient to hold and prevent slippage.
Further, the first test piece and the second test piece are rectangular plate-shaped, and the tail ends of the first test piece and the second test piece are respectively provided with a first fixing part and a second fixing part for adhering glue.
Further, the shifting mechanism comprises a connector, the connector is provided with a first connecting piece and a second connecting piece which are connected through a fastener, and the first connecting piece and the second connecting piece are opposite to clamp one end of the first test piece.
Furthermore, the fastener is a fastening bolt, round holes are formed in the first connecting piece and the second connecting piece, and the first connecting piece and the second connecting piece are detachably connected with the main screw rod through the round holes.
The utility model discloses an utilize shift mechanism to change the horizontal relative position between first test piece exposed core and the second test piece exposed core, realized test material, especially single overlap joint structure glue film, the shearing mechanical properties test under certain tensile force or compressive force effect.
Drawings
Fig. 1 is a schematic front view of a tensile shear/compressive shear test apparatus according to a preferred embodiment of the present invention.
Fig. 2 is a schematic side view of the tensile shear/compressive shear test apparatus according to the preferred embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating the first test piece and the second test piece of the tensile shear/compressive shear test apparatus according to the preferred embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments. It should be noted that the terms "left", "right", "upper", "lower", "horizontal" and "horizontal" in the following description are based on the drawings of the specification, and are used for convenience of understanding and description, but do not indicate or imply that the components or elements referred to must have a particular orientation, because they are not to be construed as limiting the present invention.
The utility model provides a tensile shearing/compression shearing experimental apparatus can be used for the certain tensile force of material or the shearing mechanical properties test under the compressive force effect, like the test of single overlap joint structure glue film. Please refer to fig. 1, fig. 2 and fig. 3. In the preferred embodiment of the present invention, the present invention provides a tensile shear/compressive shear test device, which comprises a test piece 20, a clamp 40 and a shifting mechanism 60. In detail, the test piece 20 includes a first test piece 22 and a second test piece 24, the first test piece 22 and the second test piece 24 respectively have a first fixing part 222 and a second fixing part 242 for attaching the adhesive 30, and the first fixing part 222 and the second fixing part 242 are in separable contact. The fixture 40 has a body 42, a male tip 44, a first chuck 50 and a second chuck 70, the body 42 has a hollow cavity 422 for fixing the first specimen 22, and the male tip 44 protrudes from the body 42 for clamping. The displacement mechanism 60 is mounted on the body 42 of the fixture 40 to move the clamping end 221 of the first test piece 22 to a predetermined position to test the shear mechanical properties of the cement 30 under a predetermined tensile or compressive load.
The first test piece 22 fixing part 222 and the second test piece fixing part 242 are adhered with the cement 30 to be tested, and the first test piece 22 and the second test piece 24 can be hard plates such as composite plates and steel plates. The male tab 44 is clamped by the stretcher through the first chuck 50, the clamping end 241 of the second test piece 24 is clamped by the stretcher through the second chuck 70, and the stretcher applies a shearing force to the glue 30 to be tested through the first chuck 50 and the second chuck 70.
In detail, please continue to refer to fig. 1. The displacement mechanism 60 comprises a displacement member 62, a positioning member 64 and a connecting head 46, wherein the displacement member 62 is movably connected with the body 42, the connecting head 46 is detachably connected with the clamping end 221 of the first test piece 22, so that the horizontal relative position between the clamping end 221 of the first test piece 22 and the clamping end 241 of the second test piece 24 is fixed through the displacement member 62, and the shearing mechanical property of the cement 30 under a preset tensile or compressive load is tested. The displacement member 62 moves the connecting head 46 to horizontally displace the holding end 221 of the first specimen 22 by a certain distance.
With continued reference to fig. 1. In more detail, the main screw 622 penetrates the top end of the connecting head 46, and the horizontal position of the clamping end 221 of the first specimen 22 is moved by moving the main screw 622. The positioning member 64 includes a first positioning member 642 and a second positioning member 644, the first positioning member 642 and the second positioning member 644 are distributed on two sides of the connecting head 46 to cooperate with the displacement member 62, and the horizontal distance between the clamping end 221 of the first test piece 22 and the clamping end 241 of the second test piece 24 is moved and fixed by moving and fixing the clamping end 221 of the first test piece 22, so that the glue joint bears a tensile or compressive load in a direction perpendicular to the glue layer.
In more detail, with continued reference to fig. 1, in the preferred embodiment of the present application, displacement member 62 includes a main screw 622 and a main nut 624, main screw 622 extending through body 42 and coupling head 46, main nut 624 securing main screw 622 to body 42. The main nuts 624 are provided in two numbers, respectively, on both sides of the body 42. The main screw 622 penetrates through one end of the connecting head 46, so that the first specimen 22 freely hangs down, and the stretching direction and the axis of the first specimen 22 are ensured to be in the same plane. In this embodiment, the first positioning member 642 is a positioning pin, the second positioning member 644 is a positioning nut, the positioning pin and the positioning nut are respectively fixed on two sides of the connecting member 46 to respectively cooperate with the displacement member 62, and the horizontal relative distance between the clamping end 221 of the first specimen 22 and the clamping end 241 of the second specimen 24 is moved and fixed by moving and fixing the displacement member 62. The positioning pin 642 is fixedly connected to the main screw 622, and the distance moved by the displacement member 62 is indicated by a pointer of the positioning pin and a scale on the body 42 of the jig 40.
In the above preferred embodiment, the displacement mechanism 60 is mainly composed of a bolt and a nut, and the positioning member 64 includes not only the positioning nut 644 but also the positioning pin 642. In another embodiment, the positioning member 64 has only two positioning nuts, and the first test piece 22 is fixed to the bolt by the relative displacement of the two positioning nuts. In yet another embodiment, a main screw and a slave screw are respectively provided at both sides of the first test piece 22, and the cement 30 is moved by the movement of the main screw and the slave screw and nuts provided at the main screw and the slave screw. In yet another embodiment, the displacement member 62 and the positioning member 64 of the displacement mechanism 60 are a pin and a bolt, respectively.
As mentioned above, in the preferred embodiment of the present application, the middle of the main screw 622 is a smooth and threadless area, and the top end of the connection head 46 is penetrated to allow the first test piece 22 to freely hang down, so that the direction of the tensile force from the tensile machine is in the same plane with the axial direction of the first test piece 22, thereby reducing the experimental error. The first and second clamps 50, 70 are preferably prismoid shaped with a trapezoidal cross section to facilitate gripping and prevent slippage. The first and second test pieces 22 and 24 are preferably rectangular plate-shaped, and have first and second fixing portions 222 and 242, respectively, at the ends for attaching the glue 30.
In the preferred embodiment of the present application, the displacement mechanism 60 further includes a connector 46, wherein the connector 46 has a first connector 464 and a second connector 466 connected by a fastener 462, and the first connector 464 and the second connector 466 are opposite to each other and are firmly connected to the clamping end 221 of the first test piece 22. More specifically, in the present embodiment, the fastening element 462 is a fastening bolt, circular holes are disposed on the first connecting element 464 and the second connecting element 466, and the first connecting element 464 and the second connecting element 466 are detachably connected to the main screw 622 through the circular holes. In the present embodiment, the first connector 464 and the second connector 466 are both plate-shaped.
In the preferred embodiment of the present application, the clamp 40 also has a scale 48 to facilitate mounting and adjustment of the displacement mechanism 60, such as to move the clamping end 221 of the first specimen 22 a predetermined distance, and such as to determine the distance the clamping end 221 of the first specimen 22 has moved by reading the initial position of the pointer of the positioning pin 642 and the position indicated by the positioning pin 642 after the main screw 622 has moved during mounting. The predetermined distance is pre-calculated and determined according to the mechanical property index to be measured. In the preferred embodiment of the present application, as described above, the positioning pin 642 cooperates with the screw threads on the scale 48 and the main screw 622, and in combination with the use of the positioning nut 644, the moving distance of the upper end of the first test piece 22 relative to the original position can be determined rapidly, so as to accurately test the shear mechanical properties of the detection material, such as the adhesive layer, under the action of the tensile or compressive load perpendicular to the plane direction of the adhesive layer, thereby more comprehensively characterizing the mechanical properties of the adhesive layer under the complex load state, and facilitating further improving the design accuracy and the structural lightweight level of the device using the detection material.
The utility model discloses when tensile shearing or compression shearing experimental apparatus used, take above-mentioned preferred embodiment as an example, at first fix first connecting piece 464 and second connecting piece 466 at connector 46 through main screw 622, then fix test piece 20 on first connecting piece 464 and second connecting piece 466 through fastening bolt 462. Next, the jig 40 is fixed to the stretcher chuck so that the test piece 20 is kept in a free upright state, and then fixed by the positioning nut 644. The second jaw 70 is mounted to the stretcher. The second jaw on the stretcher is moved to insert the gripping end 241 of the second test piece 24 into the second jaw 70 for temporary unclamping. Then, the horizontal distance between the clamping ends of the test pieces, i.e. the horizontal distance between the clamping end 221 of the first test piece 22 and the clamping end 241 of the second test piece 24, required by the tensile force or the compressive force which is preset to be perpendicular to the glue layer direction is calculated, then the main screw 622 is moved to a proper scale, and the second chuck 70 is clamped. Finally, applying a shear load to the adhesive joint 30 by a stretcher, and completing the test of the detection material, such as a tension-shear/compression-shear coupling test of a single lap adhesive layer.
Taking the experimental setup shown in fig. 1 as an example, when the clamping end 221 of the first test piece 22 is moved to the right by moving the main screw 622 to the right by a certain distance, a tensile force perpendicular to the plane of the adhesive layer can be generated in the test material region, such as the adhesive layer region. When the clamping end 221 of the first test piece 22 is moved a certain distance to the left by moving the main screw 622 to the left, a compressive force perpendicular to the plane of the glue layer can be generated in a test material region, such as a glue layer region. The numerical value of the generated tensile force or compressive force can be calculated by a cantilever beam formula. By adjusting the position of the main screw 622, the tensile force or the compression force perpendicular to the plane of the glue layer can be set as required to measure the shearing mechanical property of the test material.
It should be noted that the present experimental setup is only applicable when the specimen bending can be considered approximately as a small deformation.
To sum up, the utility model discloses a test piece water clamping end horizontal distance about the anchor clamps control changes the horizontal relative distance of first test piece exposed core and second test piece exposed core through the aversion mechanism promptly, has realized the test material, and especially single overlap joint structure glue film, the mechanical properties of shearing under certain tensile force or the compressive force effect test can be represented more comprehensively to the mechanical properties of test material under complicated load state, is favorable to further improving design accuracy and structure lightweight level. The utility model discloses only need one set of tensile testing machine and one set of test piece structure, this application promptly shear tensile experimental apparatus, alright realize testing material shearing mechanical properties under certain tensile force or compressive force and measure, simple structure, convenient operation, low cost.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description in any form, and although the present invention has been disclosed with reference to the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make modifications or changes equivalent to the equivalent embodiment of the above embodiments without departing from the scope of the present invention.
Claims (10)
1. A tensile shear/compressive shear experimental apparatus, comprising:
a first test piece (22) and a second test piece (24) which are respectively provided with a first fixing part (222) and a second fixing part (242) for adhering the adhesive (30), wherein the first fixing part (222) and the second fixing part (242) can be in separable contact;
the fixture (40) is provided with a body (42) and a convex head (44), the body (42) is provided with a hollow cavity (422) for fixing the first test piece (22), and the convex head (44) protrudes out of the body (42) for clamping; and
the displacement mechanism (60) is arranged on the body (42) of the clamp (40) and moves the clamping end (221) of the first test piece (22) for a preset distance so as to test the shearing mechanical property of the cement (30) under a preset tensile or compression load.
2. The tensile shear/compressive shear experimental facility of claim 1, wherein: the shift mechanism (60) includes shift piece (62), setting element (64) and connector (46), shift piece (62) with body (42) movable connection, connector (46) with exposed core (221) separable connection of first test piece (22) to through shift piece (62) removal and fixed the horizontal relative position between exposed core (241) of exposed core (221) and second test piece (24) of first test piece (22), test splice (30) shearing mechanical properties under predetermined tensile or compressive load.
3. The tensile shear/compressive shear experimental facility of claim 2, wherein:
the displacement piece (62) penetrates through the top end of the connecting head (46), and the horizontal relative position between the clamping end (221) of the first test piece (22) and the clamping end (241) of the second test piece (24) is moved by moving the connecting head (46);
the positioning piece (64) comprises a first positioning piece (642) and a second positioning piece (644), the first positioning piece (642) and the second positioning piece (644) are distributed on two sides of the connecting head (46) to be matched with the displacement piece (62), and the horizontal relative positions of the clamping end (221) of the first test piece (22) and the clamping end (241) of the second test piece (24) are moved and fixed through moving and fixing the connecting head (46).
4. The tensile shear/compressive shear experimental facility of claim 3, wherein:
the displacement piece (62) comprises a main screw rod (622) and a main nut (624), the main screw rod (622) penetrates through the body (42) and the connecting head (46), and the main nut (624) fixes the main screw rod (622) to the body (42);
the first positioning piece (642) comprises a positioning pin, the second positioning piece (644) comprises a positioning nut, the positioning pin is fixedly connected with the main screw rod (622), and the positioning nut is movably connected with the main screw rod (622); the positioning pin and the positioning nut are respectively fixed on two sides of the first test piece (22) to be respectively matched with the displacement piece (62), and the first test piece (22) is moved and fixed by moving and fixing the connecting head (46).
5. The tensile shear/compressive shear experimental facility of claim 4, wherein: the middle part of the main screw rod (622) is a smooth unthreaded area, so that the first test piece (22) can freely droop by penetrating through a first connecting piece (464) and a second connecting piece (466) in the connecting head (46), the tensile direction of the test piece and the axis of the test piece are in the same plane, and experimental errors are reduced.
6. The tensile shear/compressive shear experimental facility of claim 1, wherein: the clamp (40) has a scale (48) to facilitate mounting and adjustment of the displacement mechanism (60).
7. The tensile shear/compressive shear experimental facility of claim 1, wherein:
the clamp (40) is also provided with a first clamp head (50) and a second clamp head (70), the male head (44) is clamped by a stretcher through the first clamp head (50), and the stretcher applies shearing force to the cement (30) to be tested through the first clamp head (50) and the second clamp head (70);
the first chuck (50) and the second chuck (70) are frustum-shaped, and the cross sections of the first chuck and the second chuck are trapezoidal, so that the first chuck and the second chuck can be conveniently clamped and prevented from sliding.
8. The tensile shear/compressive shear experimental facility of claim 1, wherein: the first test piece (22) and the second test piece (24) are rectangular plate-shaped, and the tail ends of the first test piece and the second test piece are respectively provided with a first fixing part (222) and a second fixing part (242) for adhering glue (30).
9. The tensile shear/compressive shear experimental facility of claim 4, wherein: the displacement mechanism (60) comprises a connecting head (46), wherein the connecting head (46) is provided with a first connecting piece (464) and a second connecting piece (466) which are connected through a fastening piece (462), and the first connecting piece (464) and the second connecting piece (466) are opposite to clamp one end of the first test piece (22).
10. The tensile shear/compressive shear experimental facility of claim 9, wherein: the fastening piece (462) is a fastening bolt, round holes are formed in the first connecting piece (464) and the second connecting piece (466), and the first connecting piece (464) and the second connecting piece (466) are detachably connected with the main screw rod (622) through the round holes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921232575.0U CN211602743U (en) | 2019-07-30 | 2019-07-30 | Tensile shearing/compression shearing experimental device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921232575.0U CN211602743U (en) | 2019-07-30 | 2019-07-30 | Tensile shearing/compression shearing experimental device |
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| CN211602743U true CN211602743U (en) | 2020-09-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049383A (en) * | 2021-03-17 | 2021-06-29 | 北京理工大学 | Testing device and testing method for glued test piece |
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- 2019-07-30 CN CN201921232575.0U patent/CN211602743U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049383A (en) * | 2021-03-17 | 2021-06-29 | 北京理工大学 | Testing device and testing method for glued test piece |
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