CN103234815A - Test jig for testing K type composite material joint intensity - Google Patents
Test jig for testing K type composite material joint intensity Download PDFInfo
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- CN103234815A CN103234815A CN2013101285371A CN201310128537A CN103234815A CN 103234815 A CN103234815 A CN 103234815A CN 2013101285371 A CN2013101285371 A CN 2013101285371A CN 201310128537 A CN201310128537 A CN 201310128537A CN 103234815 A CN103234815 A CN 103234815A
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Abstract
The invention provides a test jig for testing K type composite material joint intensity, which belongs to the field of test jig technology. The lower end of an upper connecting rod and an upper part of two pressure head connecting rods are connected, and each lower end of the two pressure head connecting rods is connected with a dolioform pressure head respectively, and a bearer upper press block and a bearer lower press block are connected, and a small iron block is equipped in a chute of a base, and a bearer lower press block is connected by a screw and a small iron block. The invention maintains the double ends of the test piece in the test process clamped, which has a higher matching degree with a real condition; the invention keeps a restrained end, a test piece median plane and a loading end in the same plane without eccentricity which leads to bending moment; a loading end maintains a line contact between the clamp and the test piece, thereby avoiding a local destroyed phenomenon of the test piece which is caused by stress concentration induced by a point contact; the loading angle and the loading pressure head radius are adjusted according to different calibers and different included angles of the test piece, thereby increasing the utilization efficiency of the whole test clamp.
Description
Technical field
The present invention relates to a kind of test fixture of tested K type composite joint intensity, belong to the test fixture technical field.
Background technology
In Aero-Space, communications and transportation, civil construction, be applied to a large amount of truss and framed structure, it is very extensive as the web member application of this kind structure that K type pipe passes through composite joint mutually, need make a strength test to this kind joint when engineering application and structural design.Existing test fixture is often at large-scale steel frame construction or xoncrete structure, test fixture for small-sized compound substance class joint often can not guarantee that fulcrum all loads, perhaps can only apply compressive load at the main shaft of K type joint, have big gap with actual condition.How to utilize existing cupping machine that load is applied on the joint fulcrum, and guarantee not take place off-centre, how to guarantee load normal delivery between loading end and the test specimen, can not cause that loading end stress concentrates and destroy near loading end, how to guarantee to be the important topic that needs us to study according to the different test fixture of K type joint design of different angles and various outer diameter.
Summary of the invention
The objective of the invention is in order to solve the problem that above-mentioned prior art exists, be that existing test fixture is often at large-scale steel frame construction or xoncrete structure, test fixture for small-sized compound substance class joint often can not guarantee that fulcrum all loads, perhaps can only apply compressive load at the main shaft of K type joint, have big gap with actual condition.And then provide a kind of test fixture of tested K type composite joint intensity.
The objective of the invention is to be achieved through the following technical solutions:
A kind of test fixture of tested K type composite joint intensity, comprise connecting rod, two pressure head connecting rods, two dolioform pressure heads, two bearing upper holder blocks, two bearing lower lock blocks, a base and two little iron blocks, described lower end of going up connecting rod is connected with the upper end of two pressure head connecting rods, the lower end of two pressure head connecting rods respectively connects a dolioform pressure head, a bearing upper holder block is connected with a bearing lower lock block, little iron block is arranged in the chute of base, and the bearing lower lock block is connected with little iron block by screw.
Beneficial effect of the present invention: the present invention makes test specimen two ends in process of the test keep solid, and is higher with the actual condition goodness of fit; Make restrained end, test specimen central plane and loading end be in same plane, the moment of flexure that does not have off-centre to cause exists; Loading end keeps anchor clamps to contact with the test specimen line, has avoided some contact to cause the concentrated test specimen generation local failure phenomenon that causes of stress; Can also regulate the radius that loads angle and load pressure head with different angles according to the different tube diameters of test specimen, improve the utilization ratio of whole test anchor clamps.
Description of drawings
Fig. 1 is the structural representation of the test fixture of tested K type composite joint intensity of the present invention;
Fig. 2 is the structural representation of going up connecting rod;
Fig. 3 is the structural representation of pressure head connecting rod;
Fig. 4 is the structural representation of dolioform pressure head;
Fig. 5 is the structural representation of bearing upper holder block;
Fig. 6 is the structural representation of bearing lower lock block;
Fig. 7 is the structural representation of base.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing: present embodiment has provided detailed embodiment being to implement under the prerequisite with the technical solution of the present invention, but protection scope of the present invention is not limited to following embodiment.
As Fig. 1 ~ shown in Figure 7, the test fixture of a kind of tested K type composite joint intensity that this example is related, comprise connecting rod 1, two pressure head connecting rods 2, two dolioform pressure heads 3, two bearing upper holder blocks 4, two bearing lower lock blocks 5, a base 6 and two little iron blocks 7, a described end of going up connecting rod 1 is used for linking to each other with cupping machine, and the other end of last connecting rod 1 links to each other with pressure head connecting rod 2 by nut; Described pressure head connecting rod 2 mainly plays the effect that connects dolioform pressure head 3 and last connecting rod 1, and can regulate two angles between the dolioform pressure head 3; Described dolioform pressure head 3 is fixed together by Screw and pressure head connecting rod 2, and it realized that with the test exemplar line contacts when dolioform hemisphere face can guarantee to load; Described bearing upper holder block 4 is connected with bearing lower lock block 5 by screw, and the pretightning force by set screw keeps the fixing of joint exemplar; Described bearing lower lock block 5 links to each other with base 6, is connected with little iron block 7 by screw and can regulates its span.
Described upper part of going up connecting rod 1 is the cylindrical and middle through hole 11 that is provided with, it is connected with cupping machine, the center section of last connecting rod 1 is the cylinder that contains external thread 12, by the gap of nut elimination with cupping machine pin junction, the end portion of last connecting rod 1 is one to have the flat board 13 of circular arc, be provided with down through hole 14 in the middle of the flat board 13 of circular arc, in order to be connected with pressure head connecting rod 2.
The upper end of described pressure head connecting rod 2 is a L type structure, the centre is provided with through hole 21, is used for being connected with last connecting rod 1, and off-centre can not takes place when guaranteeing loading, the lower end of pressure head connecting rod 2 is that a water chestnut platform shape 22 and bottom are provided with minor thread hole 23, is used for being connected with dolioform pressure head 3.
The bottom of described dolioform pressure head 3 is provided with little screw 31, is connected with pressure head connecting rod 2 by Screw, and it is the line contact when assurance contacts with test specimen when loading that dolioform hemisphere face makes it.
The bottom of described bearing upper holder block 4 is provided with semi-cylindrical recesses 41, and bearing upper holder block 4 is provided with four vertical through holes 42 up and down, is connected with bearing lower lock block 5 by hexagon socket head cap screw, and the pretightning force by regulating double-screw bolt is test specimen fixedly.
The top of described bearing lower lock block 5 is provided with the groove 51 corresponding with the semi-cylindrical recesses 41 of bearing upper holder block 4, be used for placing pipe and pass through type joint test specimen mutually, the bottom of bearing lower lock block 5 is provided with a boss 52, the centre of boss 52 is provided with a screw that runs through 53, boss 52 is to guarantee can only take place along the displacement of base 6 length directions when bearing lower lock block 5 is connected with base 6, in the chute 61 of base 6, place a little iron block 7 then, open a screw in the middle of the little iron block, by screw bearing lower lock block 5 is connected with little iron block 7, the pretightning force of set screw can hold-down support lower lock block 5.
By above-described embodiment as seen, the present invention makes test specimen two ends in process of the test keep solid, and is higher with the actual condition goodness of fit; Make restrained end, test specimen central plane and loading end be in same plane, the moment of flexure that does not have off-centre to cause exists; Loading end keeps anchor clamps to contact with the test specimen line, has avoided some contact to cause the concentrated test specimen generation local failure phenomenon that causes of stress; Can also regulate the radius that loads angle and load pressure head with different angles according to the different tube diameters of test specimen, improve the utilization ratio of whole test anchor clamps.
The above; only be the preferable embodiment of the present invention; these embodiments all are based on the different implementations under the general idea of the present invention; and protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (6)
1. the test fixture of a tested K type composite joint intensity, it is characterized in that, comprise connecting rod (1), two pressure head connecting rods (2), two dolioform pressure heads (3), two bearing upper holder blocks (4), two bearing lower lock blocks (5), a base (6) and two little iron blocks (7), described lower end of going up connecting rod (1) is connected with the upper end of two pressure head connecting rods (2), the lower end of two pressure head connecting rods (2) respectively connects a dolioform pressure head (3), a bearing upper holder block (4) is connected with a bearing lower lock block (5), little iron block (7) is arranged in the chute (61) of base (6), and bearing lower lock block (5) is connected with little iron block (7) by bolt.
2. the test fixture of tested K type composite joint intensity according to claim 1, it is characterized in that, described upper part of going up connecting rod (1) is the cylindrical and middle through hole (11) that is provided with, the center section of last connecting rod (1) is for containing the cylinder of external thread (12), the lower end of last connecting rod (1) is one to have the flat board (13) of circular arc, is provided with down through hole (14) in the middle of the described flat board (13).
3. the test fixture of tested K type composite joint intensity according to claim 2, it is characterized in that, the upper end of described pressure head connecting rod (2) is a L type structure, the centre is provided with through hole (21), be used for being connected with last connecting rod (1), the lower end of pressure head connecting rod (2) is that a water chestnut platform shape (22) and bottom are provided with minor thread hole (23), is used for being connected with dolioform pressure head (3).
4. the test fixture of tested K type composite joint intensity according to claim 3 is characterized in that, the bottom of described dolioform pressure head (3) is provided with little screw (31), is connected with pressure head connecting rod (2) by Screw.
5. the test fixture of tested K type composite joint intensity according to claim 4, it is characterized in that, the bottom of described bearing upper holder block (4) is provided with semi-cylindrical recesses (41), bearing upper holder block (4) is provided with four vertical through holes (42) up and down, is connected with bearing lower lock block (5) by hexagon socket head cap screw.
6. the test fixture of tested K type composite joint intensity according to claim 5, it is characterized in that, the top of described bearing lower lock block (5) is provided with the groove (51) corresponding with the semi-cylindrical recesses (41) of bearing upper holder block (4), the bottom of bearing lower lock block (5) is provided with a boss (52), and the centre of boss (52) is provided with a screw that runs through (53).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310128537.1A CN103234815B (en) | 2013-04-15 | 2013-04-15 | Test jig for testing K type composite material joint intensity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310128537.1A CN103234815B (en) | 2013-04-15 | 2013-04-15 | Test jig for testing K type composite material joint intensity |
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| CN103234815A true CN103234815A (en) | 2013-08-07 |
| CN103234815B CN103234815B (en) | 2015-04-22 |
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| CN201310128537.1A Expired - Fee Related CN103234815B (en) | 2013-04-15 | 2013-04-15 | Test jig for testing K type composite material joint intensity |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846698A (en) * | 2014-03-17 | 2014-06-11 | 沈阳飞机工业（集团）有限公司 | Composite material long purlin milling flexible tool and clamping method of same |
| CN104458573A (en) * | 2014-12-10 | 2015-03-25 | 东莞市华贝电子科技有限公司 | Device and method for testing adhesion reliability of mobile phone TP touch screen |
| CN104949885A (en) * | 2015-06-05 | 2015-09-30 | 西安建筑科技大学 | Loading and measuring device for recycled concrete long-term deformation test |
| CN104949888A (en) * | 2015-06-05 | 2015-09-30 | 西安建筑科技大学 | Multiscale loading device for recycled concrete long-term crack test |
| CN105388061A (en) * | 2015-11-26 | 2016-03-09 | 中国航空工业集团公司北京航空材料研究院 | Testing clamp for toroidal fatigue of small-pipe-diameter metal pipe |
| CN105388065A (en) * | 2015-11-26 | 2016-03-09 | 中国航空工业集团公司北京航空材料研究院 | Convenient-to-clamp pipe circumferential tensile test device |
| CN105445119A (en) * | 2015-11-13 | 2016-03-30 | 长安大学 | Device and method for testing torsion resistance and shear performance of bituminous mixture |
| CN106323741A (en) * | 2015-06-18 | 2017-01-11 | 中国科学院金属研究所 | Aluminum alloy guide line monofilament axial stress fatigue test clamps and clamping method thereof |
| CN106840859A (en) * | 2015-12-07 | 2017-06-13 | 中国科学院宁波材料技术与工程研究所 | Antarafacial stretching clamp |
| CN109187746A (en) * | 2018-09-14 | 2019-01-11 | 西安石油大学 | A kind of coiled tubing banjo fixing butt jointing nondestructive detector of strength and method |
| CN110000722A (en) * | 2018-12-22 | 2019-07-12 | 浙江金浪动力有限公司 | Motorcycle engine board plug type external characteristics test stand |
| CN112414835A (en) * | 2020-11-04 | 2021-02-26 | 南昌航空大学 | Test fixture for human tooth/implant compression fatigue test |
| CN113390712A (en) * | 2021-06-02 | 2021-09-14 | 北京航空航天大学 | Impact tensile fatigue test fixture for round bar test piece |
| CN114002064A (en) * | 2021-11-02 | 2022-02-01 | 重庆邮电大学 | Multi-medium-based biaxial stretching instrument capable of adopting and disassembling clamp |
| CN115806058A (en) * | 2023-02-01 | 2023-03-17 | 天津航天瑞莱科技有限公司 | Thermal strength examination test device for aircraft conical cabin section joint |
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2013
- 2013-04-15 CN CN201310128537.1A patent/CN103234815B/en not_active Expired - Fee Related
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| US5421205A (en) * | 1992-02-14 | 1995-06-06 | Carl Schenck Ag | Apparatus for the rapid ultimate material strength testing of test samples |
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Non-Patent Citations (2)
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| E.J.BARBERO ET AL.: ""Experimental determination of the compressive strength of pultruded structural shapes"", 《COMPOSITES SCIENCE AND TECHNOLOGY》, vol. 59, no. 13, 31 October 1999 (1999-10-31), pages 2047 - 2054 * |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846698A (en) * | 2014-03-17 | 2014-06-11 | 沈阳飞机工业（集团）有限公司 | Composite material long purlin milling flexible tool and clamping method of same |
| CN103846698B (en) * | 2014-03-17 | 2016-08-24 | 沈阳飞机工业（集团）有限公司 | Composite stringer milling flexible frock and clamping method thereof |
| CN104458573A (en) * | 2014-12-10 | 2015-03-25 | 东莞市华贝电子科技有限公司 | Device and method for testing adhesion reliability of mobile phone TP touch screen |
| CN104949885A (en) * | 2015-06-05 | 2015-09-30 | 西安建筑科技大学 | Loading and measuring device for recycled concrete long-term deformation test |
| CN104949888A (en) * | 2015-06-05 | 2015-09-30 | 西安建筑科技大学 | Multiscale loading device for recycled concrete long-term crack test |
| CN106323741A (en) * | 2015-06-18 | 2017-01-11 | 中国科学院金属研究所 | Aluminum alloy guide line monofilament axial stress fatigue test clamps and clamping method thereof |
| CN105445119B (en) * | 2015-11-13 | 2018-01-12 | 长安大学 | A kind of test device and method of asphalt anti-torsion and cutting performance |
| CN105445119A (en) * | 2015-11-13 | 2016-03-30 | 长安大学 | Device and method for testing torsion resistance and shear performance of bituminous mixture |
| CN105388061A (en) * | 2015-11-26 | 2016-03-09 | 中国航空工业集团公司北京航空材料研究院 | Testing clamp for toroidal fatigue of small-pipe-diameter metal pipe |
| CN105388065A (en) * | 2015-11-26 | 2016-03-09 | 中国航空工业集团公司北京航空材料研究院 | Convenient-to-clamp pipe circumferential tensile test device |
| CN106840859A (en) * | 2015-12-07 | 2017-06-13 | 中国科学院宁波材料技术与工程研究所 | Antarafacial stretching clamp |
| CN109187746A (en) * | 2018-09-14 | 2019-01-11 | 西安石油大学 | A kind of coiled tubing banjo fixing butt jointing nondestructive detector of strength and method |
| CN110000722A (en) * | 2018-12-22 | 2019-07-12 | 浙江金浪动力有限公司 | Motorcycle engine board plug type external characteristics test stand |
| CN110000722B (en) * | 2018-12-22 | 2023-11-28 | 金浪科技有限公司 | Plug-in board type external characteristic test stand for motorcycle engine |
| CN112414835A (en) * | 2020-11-04 | 2021-02-26 | 南昌航空大学 | Test fixture for human tooth/implant compression fatigue test |
| CN113390712A (en) * | 2021-06-02 | 2021-09-14 | 北京航空航天大学 | Impact tensile fatigue test fixture for round bar test piece |
| CN114002064A (en) * | 2021-11-02 | 2022-02-01 | 重庆邮电大学 | Multi-medium-based biaxial stretching instrument capable of adopting and disassembling clamp |
| CN115806058A (en) * | 2023-02-01 | 2023-03-17 | 天津航天瑞莱科技有限公司 | Thermal strength examination test device for aircraft conical cabin section joint |
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Granted publication date: 20150422 |