CN204679341U - Dynamic tensile experiment fixture - Google Patents
Dynamic tensile experiment fixture Download PDFInfo
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- CN204679341U CN204679341U CN201520417815.XU CN201520417815U CN204679341U CN 204679341 U CN204679341 U CN 204679341U CN 201520417815 U CN201520417815 U CN 201520417815U CN 204679341 U CN204679341 U CN 204679341U
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- 238000002474 experimental method Methods 0.000 title description 8
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 238000009864 tensile test Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
本实用新型公开了一种动态拉伸实验夹具，包括主夹具、夹片和螺纹固定夹具，其中，主夹具的一端开孔，孔的内壁由外到内依次设置有内螺纹和内锥面，螺纹固定夹具的一端外周设置有与主夹具内螺纹相配合的外螺纹，螺纹固定夹具沿轴心开有供板条状试件穿过的中心孔，且在伸入主夹具内的一端开有与中心孔同轴的且最小孔径大于中心孔的锥孔，两片对称的夹片被配置用于夹紧板条状试件，夹片两端的外形分别与主夹具的内锥面和螺纹固定夹具的锥孔形状配合；本实用新型试件加工简单，装夹操作方便，实验效率高，且能适用于不同厚度的试件。
The utility model discloses a dynamic stretching test fixture, which comprises a main fixture, a clip and a threaded fixing fixture, wherein, one end of the main fixture has a hole, and the inner wall of the hole is sequentially provided with an internal thread and an internal cone surface from outside to inside. The outer circumference of one end of the threaded fixing fixture is provided with an external thread that matches the internal thread of the main fixture. The threaded fixing fixture has a central hole along the axis for the strip-shaped test piece to pass through, and one end extending into the main fixture is opened. The taper hole is coaxial with the center hole and the minimum diameter is larger than the center hole. Two symmetrical clips are configured to clamp the strip-shaped test piece. The shapes of the two ends of the clip are respectively fixed with the inner cone surface and thread of the main fixture The shape of the tapered hole of the fixture matches; the utility model has the advantages of simple processing of the test piece, convenient clamping operation, high experimental efficiency, and can be applied to test pieces of different thicknesses.
Description
技术领域technical field
本实用新型属于材料力学实验研究技术领域，特别是一种动态拉伸实验夹具。The utility model belongs to the technical field of material mechanics experiment research, in particular to a dynamic tensile experiment fixture.
背景技术Background technique
近年来，随着分离式Hopkinson拉杆(Split Hopkinson Torsion Bar，SHTB)技术的改进，分离式霍普金森试验装置已成为当前研究材料动态力学性能的一种重要手段，其基于一维应力波的理论，在不同应变率下进行实验获得材料的动态力学行为，引起了工程界的广泛关注。In recent years, with the improvement of Split Hopkinson Torsion Bar (SHTB) technology, the split Hopkinson test device has become an important means to study the dynamic mechanical properties of materials. It is based on the theory of one-dimensional stress wave , to obtain the dynamic mechanical behavior of materials through experiments at different strain rates, which has aroused widespread concern in the engineering community.
通常分离式霍普金森拉杆装置所完成的动态拉伸实验，基本是制备双头螺纹试件再进行高应变率实验，如文献“Fransplass H,Langseth M,Hopperstad O S.Tensile behaviourof threaded steel fasteners at elevated rates of strain[J].International Journal of ImpactEngineering,2011,53(11):946–957.”和“Feng F,Huang S,Meng Z,et al.Experimentalstudy on tensile property of AZ31B magnesium alloy at different high strain rates andtemperatures[J].Materials&Design,2014,57(5):10–20.”中所述，螺纹加工使试件的制备过程复杂又耗时；又或者是文献“Xu Z,Li Y.A novel method in determination ofdynamic fracture toughness under mixed mode I/II impact loading[J].International Journal ofSolids&Structures,2012,49:366–376.”所采用的在试件上开孔与销相固定的方式，与前者相比所需实验试样虽容易加工些，但开孔所导致的应力集中及微裂纹产生与扩展等问题却无法避免。Usually, the dynamic tensile test completed by the separate Hopkinson rod device is basically to prepare double-threaded specimens and then perform high strain rate experiments, such as the literature "Fransplass H, Langseth M, Hopperstad O S. Tensile behavior of threaded steel fasteners at elevated rates of strain[J].International Journal of Impact Engineering,2011,53(11):946–957.” and “Feng F, Huang S, Meng Z, et al. Experimental study on tensile property of AZ31B magnesium alloy at different high strain rates and temperatures[J].Materials&Design,2014,57(5):10–20.”, the thread processing makes the preparation process of the specimen complicated and time-consuming; or the literature “Xu Z, Li Y.A novel method In determination of dynamic fracture toughness under mixed mode I/II impact loading[J].International Journal of Solids&Structures,2012,49:366–376.” Compared with the former, the method of opening holes and pins on the test piece is fixed Although the required experimental samples are easier to process, problems such as stress concentration caused by opening holes and the generation and propagation of micro-cracks cannot be avoided.
实用新型内容Utility model content
本实用新型的目的在于提供一种试件加工简单，装夹操作方便，实验效率高，且能适用于不同厚度的试件的动态拉伸实验夹具。The purpose of the utility model is to provide a dynamic tensile test fixture which is simple in processing, convenient in clamping operation, high in experiment efficiency, and applicable to test pieces of different thicknesses.
实现本实用新型目的的技术解决方案为：The technical solution to realize the purpose of this utility model is:
一种动态拉伸实验夹具，包括主夹具、夹片和螺纹固定夹具，其中，主夹具的一端开孔，孔的内壁由外到内依次设置有内螺纹和内锥面，螺纹固定夹具的一端外周设置有与主夹具内螺纹相配合的外螺纹，螺纹固定夹具沿轴心开有供板条状试件穿过的中心孔，且在伸入主夹具内的一端开有与中心孔同轴的且最小孔径大于中心孔的锥孔，两片对称的夹片被配置用于夹紧板条状试件，夹片两端的外形分别与主夹具的内锥面和螺纹固定夹具的锥孔形状配合。A dynamic tensile test fixture, including a main fixture, a clip and a threaded fixing fixture, wherein one end of the main fixture has a hole, and the inner wall of the hole is provided with internal threads and inner cones from outside to inside, and one end of the threaded fixing fixture The outer circumference is provided with an external thread that matches the internal thread of the main fixture. The threaded fixture has a central hole along the axis for the strip-shaped test piece to pass through, and a hole coaxial with the central hole is opened at the end extending into the main fixture. The tapered hole with the minimum hole diameter larger than the central hole, two symmetrical clips are configured to clamp the strip-shaped test piece, the shape of the two ends of the clip is respectively the same as the inner cone surface of the main fixture and the taper hole shape of the threaded fixture Cooperate.
本实用新型与现有技术相比，其显著优点：Compared with the prior art, the utility model has significant advantages:
(1)本实用新型动态拉伸实验夹具所采用的实验试件为板条状，加工工艺简单，装夹方便，能够避免应力的集中。(1) The experimental specimens adopted by the dynamic tension test fixture of the utility model are lath-shaped, the processing technology is simple, the clamping is convenient, and the concentration of stress can be avoided.
(2)本实用新型动态拉伸实验夹具的主夹具、夹片和螺纹固定夹具之间通过锥面相贴合，契合程度高。(2) The main clamp, the clip and the threaded fixing clamp of the utility model's dynamic tensile test fixture are fitted together through the tapered surface, and the degree of fit is high.
(3)本实用新型动态拉伸实验夹具的主夹具与被配置的霍普金森拉杆以及与螺纹固定夹具之间均选用螺纹配合，有效固定，操作容易。(3) The main clamp of the dynamic tensile test fixture of the utility model is fitted with the configured Hopkinson pull rod and threaded fixing fixtures, which are effectively fixed and easy to operate.
(4)本实用新型动态拉伸实验夹具可适用于不同厚度的试件，能够通过主夹具与螺纹固定夹具之间螺纹配合的长度达到在不同位置固定的目的。(4) The utility model's dynamic tensile test fixture can be applied to test pieces of different thicknesses, and can be fixed at different positions through the length of thread fit between the main fixture and the threaded fixing fixture.
下面结合附图对本实用新型作进一步详细描述。Below in conjunction with accompanying drawing, the utility model is described in further detail.
附图说明Description of drawings
图1是本实用新型动态拉伸实验夹具的总体结构示意图。Fig. 1 is the overall structure schematic diagram of the utility model dynamic tensile test fixture.
图2是本实用新型动态拉伸实验夹具的主夹具的立体结构示意图。Fig. 2 is a three-dimensional structural schematic diagram of the main fixture of the dynamic tensile test fixture of the present invention.
图3是本实用新型动态拉伸实验夹具的夹片的立体结构示意图。Fig. 3 is a schematic diagram of the three-dimensional structure of the clips of the dynamic tensile test fixture of the present invention.
图4是本实用新型动态拉伸实验夹具的螺纹固定夹具的立体结构示意图。Fig. 4 is a three-dimensional structural schematic diagram of the threaded fixing fixture of the dynamic tensile test fixture of the present invention.
具体实施方式Detailed ways
结合图1～图4：Combined with Figure 1 to Figure 4:
本实用新型一种动态拉伸实验夹具，包括主夹具1、夹片2和螺纹固定夹具3，其中，主夹具1的一端设置有被配置于与霍普金森拉杆相连接的外螺纹，另一端开孔，孔的内壁由外到内依次设置有内螺纹和内锥面，螺纹固定夹具3的一端外周设置有与主夹具1内螺纹相配合的外螺纹，螺纹固定夹具3沿轴心开有供板条状试件4穿过的中心孔，且在伸入主夹具1内的一端开有与中心孔同轴的且最小孔径大于中心孔的锥孔，两片对称的夹片2被配置用于夹紧板条状试件4，夹片2两端的外形分别与主夹具1的内锥面和螺纹固定夹具3的锥孔形状配合。The utility model is a dynamic tensile test fixture, comprising a main fixture 1, a clip 2 and a threaded fixing fixture 3, wherein one end of the main fixture 1 is provided with an external thread configured to be connected with a Hopkinson pull rod, and the other end is The hole is opened, and the inner wall of the hole is provided with an internal thread and an internal tapered surface sequentially from the outside to the inside. The outer circumference of one end of the threaded fixture 3 is provided with an external thread that matches the internal thread of the main fixture 1. The threaded fixture 3 is provided along the axis. The central hole for the strip-shaped test piece 4 to pass through, and a tapered hole coaxial with the central hole and with a minimum diameter larger than the central hole is opened at one end extending into the main fixture 1, and two symmetrical clips 2 are configured Used for clamping the strip-shaped test piece 4, the shapes of the two ends of the clip 2 are matched with the inner cone surface of the main fixture 1 and the taper hole shape of the threaded fixing fixture 3 respectively.
结构装配：Structural assembly:
主夹具1与所配置的霍普金森拉杆通过螺纹连接，两块对称的夹片2将板条状试件4夹紧，与主夹具1内孔锥面相贴合；螺纹固定夹具3锥面与夹片2贴合，其外螺纹通过与主夹具1内螺纹配合来达到固定的目的。The main fixture 1 is connected with the configured Hopkinson tie rod through threads, and two symmetrical clips 2 clamp the strip-shaped test piece 4, and fit with the cone surface of the inner hole of the main fixture 1; the threaded fixing fixture 3 cone surface and The clip 2 fits together, and its external thread cooperates with the internal thread of the main fixture 1 to achieve the purpose of fixing.
实验操作：Experimental operation:
实验前，将待测材料切成一定宽度的板条状试件4，其尺寸必须小于螺纹固定夹具3中心孔的尺寸，将两块对称的夹片2夹紧试件后放入主夹具1中，通过锥面配合，然后将主夹具1装配在拉杆上，把螺纹固定夹具3旋入主夹具1，使螺纹固定夹具3内锥孔的锥面与夹片2的锥面契合，使其固定并保证试件不会发生滑脱，通过动态拉伸完成高应变率实验。Before the experiment, the material to be tested is cut into a strip-shaped test piece 4 of a certain width, and its size must be smaller than the size of the center hole of the threaded fixing fixture 3, and two symmetrical clips 2 are clamped to the test piece and then put into the main fixture 1 In the process, the main fixture 1 is assembled on the pull rod through the fit of the taper surface, and the threaded fixing fixture 3 is screwed into the main fixture 1, so that the tapered surface of the inner tapered hole of the threaded fixing fixture 3 fits with the tapered surface of the clip 2, so that Fix and ensure that the specimen will not slip, and complete the high strain rate experiment through dynamic tension.
Claims (2)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520417815.XU CN204679341U (en) | 2015-06-16 | 2015-06-16 | Dynamic tensile experiment fixture |
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| CN201520417815.XU CN204679341U (en) | 2015-06-16 | 2015-06-16 | Dynamic tensile experiment fixture |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897461A (en) * | 2015-06-16 | 2015-09-09 | 南京理工大学 | Dynamic tension experiment fixture |
| CN107121332A (en) * | 2017-06-07 | 2017-09-01 | 南京理工大学 | Servicing unit for split hopkinson press bar testing equipment |
| CN109030194A (en) * | 2018-08-01 | 2018-12-18 | 长沙理工大学 | A assembled anchor clamps for fatigue crack growth rate test |
-
2015
- 2015-06-16 CN CN201520417815.XU patent/CN204679341U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897461A (en) * | 2015-06-16 | 2015-09-09 | 南京理工大学 | Dynamic tension experiment fixture |
| CN107121332A (en) * | 2017-06-07 | 2017-09-01 | 南京理工大学 | Servicing unit for split hopkinson press bar testing equipment |
| CN107121332B (en) * | 2017-06-07 | 2023-08-08 | 南京理工大学 | Auxiliary device for separated Hopkinson pressure bar test equipment |
| CN109030194A (en) * | 2018-08-01 | 2018-12-18 | 长沙理工大学 | A assembled anchor clamps for fatigue crack growth rate test |
| CN109030194B (en) * | 2018-08-01 | 2023-12-15 | 长沙理工大学 | An assembled fixture for fatigue crack growth rate testing |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20170616 |
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| CF01 | Termination of patent right due to non-payment of annual fee |