CN1619286A - Stretching clamping device used for nonmetal material stretching mechanics performance testing - Google Patents
Stretching clamping device used for nonmetal material stretching mechanics performance testing Download PDFInfo
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- CN1619286A CN1619286A CN 200310113373 CN200310113373A CN1619286A CN 1619286 A CN1619286 A CN 1619286A CN 200310113373 CN200310113373 CN 200310113373 CN 200310113373 A CN200310113373 A CN 200310113373A CN 1619286 A CN1619286 A CN 1619286A
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Abstract
The present invention disclosed a tension gripping device for testing tension mechanical property of non-metal material. When said gripping device is used, it is fixedly connected with one end portion of dumbbell-like standard sample. Said gripping device includes a plate-shaped main body with upper surface and lower surface, in the main body a recessed zone extended toward lower surface from upper surface is limited, and said recessed zone has an opening end positioned on side of said main body, and the form and size of said zone are basically identical to that of end portion of standard sample.
Description
Technical field
The present invention relates to employed anchor clamps in the measuring technique, more particularly, the present invention relates to a kind of stretching clamp that is used for the nonmetallic materials stretching mechanical property testing.
Background technology
Along with the widespread use of various nonmetallic materials in fields such as Aeronautics and Astronautics, the energy, electric, chemical industry, communications and transportation, medical science, the mechanical property of research nonmetallic materials just seems extremely important.
Whole material mechanical performance test is carried out on the Reger electronic universal tester of the cryomechanics test macro of being furnished with normal temperature mechanical meaurement system and independent development, and data are connected to control collection on the computing machine by high precision, high-sensitive instrument.Tensile test fixture then is an one of critical component of measuring the tensile mechanical properties of material.In process of the test, the two ends of test specimen should be fixed on the anchor clamps, and anchor clamps are fixedlyed connected with cupping machine, and testing machine is by the anchor clamps tensile sample, finally obtain the mechanical properties such as pulling strengrth, elastic modulus, extensibility of sample.Concrete test condition reference standard is carried out.The shape and size of sample meet GB or ASTM standard usually, and as depicted in figs. 1 and 2, two ends must be dumbbell shape, and sample Validity Test section is middle straight line segment position.
The tensile test fixture that at present domestic and international testing machine factory provides adopts the anchor clamps of spring auto-locking suspension usually, its mainly the friction force that produces of the sawtooth by self-lock force and clamping surface two dumb-bell shape ends of sample are clamped, carry out tension test thereby be connected with testing machine.
The shortcoming of this anchor clamps is:
1) anchor clamps are difficult for installing, sample being had certain destructiveness at low temperatures;
2) when measuring the tensile property of material at low temperatures, because sample material in the special nature of low temperature environment, between anchor clamps and sample skidding can take place; And can't be implemented in clamping etc. in the airtight low temperature environment, thereby not be suitable for the use of low temperature environment;
3) the general complex structure of these anchor clamps, volume are big.
Summary of the invention
The objective of the invention is to overcome the shortcoming of existing anchor clamps, provide a kind of stretching clamp according to the architectural feature of standard sample; Another object of the present invention provides a kind of stretching clamp, and these anchor clamps are particularly suitable for the test of sample tensile mechanical properties under the low temperature environment.
To achieve these goals, the invention provides a kind of stretching clamp, be used for the nonmetallic materials stretching mechanical property testing, these anchor clamps are fixedlyed connected with an end of dumbbell shaped standard sample in use; These anchor clamps comprise that one has the plate-like body on upper and lower surface; Define a sunk area that extends to lower surface from upper surface in the described main body, described sunk area has an openend that is positioned on the described main body side; The shape in described zone and size are basic identical with the end of standard sample, so that in use the end of standard sample is embedded in this zone.
The upper and lower surface of described sunk area through-body, its degree of depth are the thickness of main body.These anchor clamps also comprise upper cover plate and the lower cover that removably is fixed on the main body, and described upper and lower cover plate is covered in the upper surface and the lower surface of described main body respectively.Between the end of upper and lower cover plate and standard sample, be respectively arranged with pad.
Described sunk area penetrates the upper surface of described main body, and this sunk area has a bottom surface, and its degree of depth is less than the thickness of main body.These anchor clamps also comprise the upper cover plate that removably is fixed on the main body, and described upper cover plate is covered in the upper surface of described main body.Between upper cover plate and standard sample, be provided with pad, and between the end of the bottom surface of described sunk area and standard sample, be provided with pad.
The shape of described pad and size are basic identical with the end of described standard sample.End away from the main body of described openend on main body is provided with a through hole.
Tensile test fixture of the present invention is compared with the anchor clamps of existing use both at home and abroad, and its volume is 1/10 (the about 300cm of the volume of plain clamp of plain clamp
3), quality only is 1/16 (the about 1Kg of the quality of plain clamp) of plain clamp, and simple in structure, convenient mounting and clamping has overcome the phenomenon that test specimen skids at low temperatures well, and can realize various product measurement under low temperature environment, has saved cost greatly.Cryogenic tensile anchor clamps of the present invention have higher using value applicable to the Mechanics Performance Testing of nonmetallic materials such as various macromolecular materials, compound substance.
Description of drawings
Fig. 1 is the sample synoptic diagram of GB regulation;
Fig. 2 is the sample synoptic diagram of ASTM regulation;
Fig. 3 is the three-view diagram of an embodiment of stretching clamp of the present invention, and wherein (A) is vertical view, (B) is the left view along the A-A line, (C) is front elevation;
Fig. 4 is the three-view diagram of an embodiment of the stretching clamp of the present invention's plate with cover, and wherein (A) is vertical view, (B) is the left view along the A-A line, (C) is front elevation;
Fig. 5 is the synoptic diagram of the pad in the stretching clamp of the present invention;
Fig. 6 is the synoptic diagram of the rectangle cover plate of stretching clamp of the present invention;
Fig. 7 is the three-view diagram of another embodiment of stretching clamp of the present invention, and wherein (A) is vertical view, (B) is the left view along the A-A line, (C) is front elevation.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
In material mechanical performance test, the shape of standard sample generally as depicted in figs. 1 and 2, wherein, Fig. 1 is the sample of GB regulation, Fig. 2 is the sample of ASTM regulation.Can find out that from Fig. 1 and Fig. 2 standard sample is generally dumbbell shape, comprise two ends 1 and middle straight line segment portion 2, wherein the sample that dotted line enclosed among Fig. 1 and Fig. 2 partly is one of them end 1.There is being a convergent portion 3 end 1 near straight-line segment portion 2 places, and the width of end 1 moves closer to the width of straight-line segment portion 2 in convergent portion 3.
Be that example illustrates the present invention with standard sample shown in Figure 1 below.
Stretching clamp of the present invention as shown in Figure 3, these anchor clamps are made of a plate-like body 4, this main body 4 has upper surface 5 and lower surface 6.In main body 4, sunk area 7 extends to lower surface 6 from upper surface 5, and the end 1 of standard sample is basic identical among the shape in this zone 7 and size and Fig. 1, so that in use the end 1 of standard sample is embedded in this zone 7.As can be seen from Figure 3, corresponding with the convergent portion 3 among Fig. 1, sunk area 7 also has a contraction flow region 8, and this contraction flow region 8 is the convergent portion 3 for chimeric sample on the one hand, also makes sample can not pull out from zone 7 when work on the other hand.
As shown in Figure 3, sunk area 7 has an openend 10 at a side 9 of main body 4, and when the end 1 of the standard sample among Fig. 1 was embedded into sunk area 7, the straight-line segment portion 2 of standard sample can extend out from this openend 10.
In one embodiment, as shown in Figure 3, sunk area 7 is to have penetrated the upper surface 5 of jig main body 4 and lower surface 6, and the degree of depth in this zone 7 just is the thickness of main body 4.
As shown in Figure 4, after the end 1 of sample is embedded into the sunk area 7 of anchor clamps shown in Figure 3, in order to limit sample moving along the main body above-below direction, make that end 1 is unlikely to come off in sunk area 7, be preferably in to cover respectively on the upper surface 5 of main body 4 and the lower surface 6 and install cover plate 11 and lower cover 12.Wherein, can find out from Fig. 4 (C) that to be L shaped, L shaped one side 13 extend along the side of main body 4 for upper cover plate 11 and lower cover 12, and with main body 4 between by fixedlying connected, shown in Fig. 4 (B) as securing members such as screw 14.
Best, between the end 1 of upper and lower cover plate 11,12 and standard sample, be respectively arranged with pad 15, so that end 1 is fixing.And the thickness of pad 15 can be adjusted, and makes end 1 can be positioned at the centre position of sunk area 7 on above-below direction.The shape of pad 15 and size end 1 best and standard sample is basic identical, as shown in Figure 5.
In addition, as shown in Figure 3, the end away from the main body 4 of described openend 10 on jig main body 4 is provided with a through hole 16, and through hole 16 is used for fixing with the universal connecting shaft of testing machine.
Separate upper cover plate 11 and the lower cover 12 that is provided with though figure 4 illustrates, in actual applications, can adopt multiple mode to arrange upper cover plate 11 and lower cover 12, for example in Fig. 6, upper cover plate 11 and lower cover 12 are integrally formed as a rectangle tubular, jig main body 4 of the present invention can be inserted in this rectangular cylinder in use, the benefit of doing like this is to save fixture, and easy for installation.
In another embodiment, as shown in Figure 7, sunk area 7 is identical with shape among Fig. 3, but 7 of sunk areas have penetrated the upper surface 5 of jig main body 4, and this sunk area 7 has a bottom surface 17, and its degree of depth is less than the thickness of main body 4.Such benefit is after the end 1 with sample embeds this sunk area 7, only need upper cover plates 11 (not shown in Fig. 7) fix sample, and the function of lower cover 12 among Fig. 4 can be realized in bottom surface 17.
With silica modified epoxy resin based nano composite material is example, the tensile property under the room temperature of test material and the low temperature (77K).Experimental machine is the WD-10A type, produce by Guangzhou testing machine factory, and in this year by Shenzhen Rui Geer corporate makeover.The two ends of dumbbell shape sample shown in Figure 1 are embedded in respectively in the sunk area 7 of stretching clamp of the present invention shown in Figure 3, the sample pros and cons adds the elastomeric pad (Fig. 5) of stack pile to guarantee centering, cover plate up and down 11,12 as shown in Figure 4 compresses sample then, tightens the screw 14 in the side.After treating that anchor clamps install sample, the through hole on it 16 (Fig. 3) and the universal connecting shaft of testing machine are fixed with pin.Be placed at last in the airtight cryogenic tensile experiment container and measure.
The results showed, stretching clamp of the present invention can well be applied to the stretching mechanical of low temperature environment 77K and measure, can accurately, reliably, stably measure pulling strengrth, elastic modulus, the fracture elongation of compound substance under room temperature and low temperature, anchor clamps itself do not have influence to test findings.And test result is accurate, reliable, and to the work shoulder place not damaged of sample, all in the gauge length scope of standard code, distortion evenly shows that the design of these anchor clamps retaining part is comparatively reasonable to fracture location; Show that with the sample test result data repeatability is better, can think that anchor clamps itself do not have influence substantially to measuring through a plurality of simultaneously.
Claims (9)
1, a kind of stretching clamp is used for the nonmetallic materials stretching mechanical property testing, and these anchor clamps are fixedlyed connected with an end of dumbbell shaped standard sample in use; It is characterized in that these anchor clamps comprise that one has the plate-like body on upper and lower surface; Define a sunk area that extends to lower surface from upper surface in the described main body, described sunk area has an openend that is positioned on the described main body side; The shape in described zone and size are basic identical with the end of standard sample, so that in use the end of standard sample is embedded in this zone.
2, stretching clamp according to claim 1 is characterized in that, the upper and lower surface of described sunk area through-body, and its degree of depth is the thickness of main body.
3, stretching clamp according to claim 2 is characterized in that, also comprises the upper cover plate and the lower cover that removably are fixed on the main body, and described upper and lower cover plate is covered in the upper surface and the lower surface of described main body respectively.
4, stretching clamp according to claim 3 is characterized in that, is respectively arranged with pad between the end of upper and lower cover plate and standard sample.
5, stretching clamp according to claim 1 is characterized in that, described sunk area penetrates the upper surface of described main body, and this sunk area has a bottom surface, and its degree of depth is less than the thickness of main body.
6, stretching clamp according to claim 5 is characterized in that, also comprises the upper cover plate that removably is fixed on the main body, and described upper cover plate is covered in the upper surface of described main body.
7, stretching clamp according to claim 6 is characterized in that, is provided with pad between upper cover plate and standard sample, and is provided with pad between the end of the bottom surface of described sunk area and standard sample.
According to claim 4 or 7 described stretching clamps, it is characterized in that 8, the shape of described pad and size are basic identical with the end of described standard sample.
9, stretching clamp according to claim 1 is characterized in that, the end away from the main body of described openend on main body is provided with a through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101133731A CN1332193C (en) | 2003-11-17 | 2003-11-17 | Stretching clamping device used for nonmetal material stretching mechanics performance testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101133731A CN1332193C (en) | 2003-11-17 | 2003-11-17 | Stretching clamping device used for nonmetal material stretching mechanics performance testing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1619286A true CN1619286A (en) | 2005-05-25 |
| CN1332193C CN1332193C (en) | 2007-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101133731A Expired - Fee Related CN1332193C (en) | 2003-11-17 | 2003-11-17 | Stretching clamping device used for nonmetal material stretching mechanics performance testing |
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| CN (1) | CN1332193C (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323143A (en) * | 2011-05-18 | 2012-01-18 | 西安近代化学研究所 | Fixture for tensile bonding strength test of solid propellant and coating |
| CN101109678B (en) * | 2007-06-07 | 2012-05-23 | 上海电缆研究所 | Testing jig |
| CN102607951A (en) * | 2012-03-08 | 2012-07-25 | 北京航空航天大学 | Double-head tenon joint tension test structure without additional bending moment |
| CN103926143A (en) * | 2014-05-04 | 2014-07-16 | 中国原子能科学研究院 | Special clamp for tiny plate-like stretch and creep sample |
| CN104568577A (en) * | 2013-10-25 | 2015-04-29 | 中石化胜利油建工程有限公司 | Novel plastic tensile property testing clamp |
| CN104655547A (en) * | 2013-11-20 | 2015-05-27 | 沈阳工业大学 | Hanging-type middle fixture used for durability test |
| CN105716942A (en) * | 2016-01-27 | 2016-06-29 | 北京航空航天大学 | Mechanical performance test clamp for polymer material in high-low-temperature environmental box |
| CN106483019A (en) * | 2016-11-29 | 2017-03-08 | 华中科技大学 | A kind of plate tensile sample stretching clamp and its using method |
| CN106769423A (en) * | 2016-11-24 | 2017-05-31 | 中国航空工业集团公司北京航空材料研究院 | One kind is applied to plate tensile sample high-temperature and durable creeping test fixture |
| CN107796708A (en) * | 2017-11-29 | 2018-03-13 | 东北大学 | A kind of 196 DEG C of tensile test of metallic materials devices |
| CN108318340A (en) * | 2018-03-13 | 2018-07-24 | 洛阳铜金属材料发展有限公司 | Composition metal part strength test method and tensile sample and tensile connector |
| CN108426769A (en) * | 2018-03-26 | 2018-08-21 | 辽宁工业大学 | A kind of metal material micro tensile specimen Mechanics Performance Testing device |
| CN109342212A (en) * | 2018-10-15 | 2019-02-15 | 西北工业大学 | Superhigh temperature fatigue experimental device and its fixture |
| CN110608954A (en) * | 2019-10-22 | 2019-12-24 | 中国工程物理研究院化工材料研究所 | Series connection tensile loading device for dumbbell-shaped test samples |
| CN111487130A (en) * | 2020-04-16 | 2020-08-04 | 河海大学 | Novel centre gripping test equipment of exempting from of aquogel tensile test |
| CN114750088A (en) * | 2022-04-08 | 2022-07-15 | 北航（四川）西部国际创新港科技有限公司 | Thin-wall sample test fixture |
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| US4662229A (en) * | 1985-08-26 | 1987-05-05 | Curtis John M | Grip assembly |
| DE3924345A1 (en) * | 1989-07-22 | 1991-01-31 | Schunk Kohlenstofftechnik Gmbh | Reinforced carbon clamp for high temp. draw testing - has tubular mounting heads for pairs of mounting parts forming cylinders with slots for specimen |
| US5056372A (en) * | 1990-11-28 | 1991-10-15 | Gte Laboratories Incorporated | Copper collet grip mechanism |
| US5237876A (en) * | 1992-07-29 | 1993-08-24 | Martin Marietta Energy Systems, Inc. | Apparatus for tensile testing plate-type ceramic specimens |
| CN2192033Y (en) * | 1994-02-18 | 1995-03-15 | 上海钢铁研究所 | Device for measuring deformation generated by temp. |
| CN2325771Y (en) * | 1998-04-29 | 1999-06-23 | 中国科学院力学研究所 | Chuck used for elongation test |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109678B (en) * | 2007-06-07 | 2012-05-23 | 上海电缆研究所 | Testing jig |
| CN102323143A (en) * | 2011-05-18 | 2012-01-18 | 西安近代化学研究所 | Fixture for tensile bonding strength test of solid propellant and coating |
| CN102607951A (en) * | 2012-03-08 | 2012-07-25 | 北京航空航天大学 | Double-head tenon joint tension test structure without additional bending moment |
| CN104568577A (en) * | 2013-10-25 | 2015-04-29 | 中石化胜利油建工程有限公司 | Novel plastic tensile property testing clamp |
| CN104655547A (en) * | 2013-11-20 | 2015-05-27 | 沈阳工业大学 | Hanging-type middle fixture used for durability test |
| CN103926143A (en) * | 2014-05-04 | 2014-07-16 | 中国原子能科学研究院 | Special clamp for tiny plate-like stretch and creep sample |
| CN105716942A (en) * | 2016-01-27 | 2016-06-29 | 北京航空航天大学 | Mechanical performance test clamp for polymer material in high-low-temperature environmental box |
| CN106769423A (en) * | 2016-11-24 | 2017-05-31 | 中国航空工业集团公司北京航空材料研究院 | One kind is applied to plate tensile sample high-temperature and durable creeping test fixture |
| CN106769423B (en) * | 2016-11-24 | 2019-05-21 | 中国航空工业集团公司北京航空材料研究院 | One kind being suitable for plate tensile sample high-temperature and durable creeping test fixture |
| CN106483019A (en) * | 2016-11-29 | 2017-03-08 | 华中科技大学 | A kind of plate tensile sample stretching clamp and its using method |
| CN107796708A (en) * | 2017-11-29 | 2018-03-13 | 东北大学 | A kind of 196 DEG C of tensile test of metallic materials devices |
| CN108318340A (en) * | 2018-03-13 | 2018-07-24 | 洛阳铜金属材料发展有限公司 | Composition metal part strength test method and tensile sample and tensile connector |
| CN108426769A (en) * | 2018-03-26 | 2018-08-21 | 辽宁工业大学 | A kind of metal material micro tensile specimen Mechanics Performance Testing device |
| CN108426769B (en) * | 2018-03-26 | 2020-05-22 | 辽宁工业大学 | Mechanical property testing device for metal material miniature tensile sample |
| CN109342212A (en) * | 2018-10-15 | 2019-02-15 | 西北工业大学 | Superhigh temperature fatigue experimental device and its fixture |
| CN110608954A (en) * | 2019-10-22 | 2019-12-24 | 中国工程物理研究院化工材料研究所 | Series connection tensile loading device for dumbbell-shaped test samples |
| CN111487130A (en) * | 2020-04-16 | 2020-08-04 | 河海大学 | Novel centre gripping test equipment of exempting from of aquogel tensile test |
| CN114750088A (en) * | 2022-04-08 | 2022-07-15 | 北航（四川）西部国际创新港科技有限公司 | Thin-wall sample test fixture |
| CN114750088B (en) * | 2022-04-08 | 2024-02-20 | 北航（四川）西部国际创新港科技有限公司 | Thin-wall sample test fixture |
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