CN101603898B - Clamp for testing sheering property of continuous fiber reinforced composite material - Google Patents
Clamp for testing sheering property of continuous fiber reinforced composite material Download PDFInfo
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- CN101603898B CN101603898B CN2009100233208A CN200910023320A CN101603898B CN 101603898 B CN101603898 B CN 101603898B CN 2009100233208 A CN2009100233208 A CN 2009100233208A CN 200910023320 A CN200910023320 A CN 200910023320A CN 101603898 B CN101603898 B CN 101603898B
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- lower clamp
- zigzag
- seaming chuck
- sheering
- testing
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Abstract
The invention relates to a clamp for testing sheering property of continuous fiber reinforced composite material, which has the technical characteristics that an upper pressure head is T-shaped structure; a T-shaped upper pressure head spacer slot is arranged in the upper pressure head, and an upper pressure head spacer is arranged in the spacer slot; a lower clamp is in a cuboid structure whose two sides have circular arc surfaces, and one of two sides is provided with a thermocouple patchhole; the middle of the cuboid structure is a through hole whose lower end is provided with a rectangle spacer slot in which a lower clamp spacer whose thickness is equal to that of the lower clamp is arranged; the other side relative to the thermocouple patchhole is provided with an inclined plane abutting on a serrated trapezium block which is inserted at the position of the inclined plane in the lower clamp, and the serrated inclined plane and the inclined plane of the lower clamp inosculate; thelower arc surface of the pressure head and the inner circular arc surface of the lower clamp use clearance fit. The influence of flexible effect to a test result is reduced when the clamp of the invention is adopted for testing, which makes the test result closer to the real sheering intensity of the reinforced composite material.
Description
Technical field
The present invention relates to a kind of anchor clamps that are used for testing sheering property of continuous fiber reinforced composite material, can be applied to test interlayer, the inplane shear intensity of continuous fiber reinforced composite materials under high temperature, the room temperature condition.
Background technology
The cutting performance of material is one of key property of evaluation material.The experimental technique of existing test compound material shear resistance is a lot, mainly contains: the short beam method; The two incision method; The V-notch method.Each experimental technique all has shortcoming separately, but what be most widely used at present is the ASTM C1425-05 (high temperature) and ASTM C1292-00 (room temperature) standard of the U.S., just two incision (DNS) experimental method.
A kind of anchor clamps of test compound material cutting performance have been introduced in the document " ASTM C1292-00 and ASTM C1425-05 standard " respectively.
In the ASTM C1292-00 anchor clamps, its architectural feature is: with a chain for binding criminals line movable clip block and anchor clamps are coupled together, reach the purpose of stepping up sample, prevent the sample bending.The shortcoming of these anchor clamps is: only be applicable to the room temperature shear test, at high temperature a chain for binding criminals line connects and will lose efficacy, and can not play the effect of supporting sample.
In the ASTM C1425-05 anchor clamps, its architectural feature is: use piston structure, by increase the suitable intermediate layer material of one deck between test fixture and sample, the dependence material at high temperature difference of thermal expansion amount is guaranteed sample not influence of effect by bending in process of the test.But the thermal expansivity of the interphase material that requirement is used is more than or equal to the thermal expansivity of sample on thickness direction.Require under test temperature among the ASTM C1425-05, the space can not be adjusted by the difference of thermal expansion amount greater than 1% of sample thickness in the space of sample and holder wall.The shortcoming of these anchor clamps is: all will select the intermediate layer material that matches separately for the different material of test, so the range of application of test fixture is restricted; Owing to the coefficient of thermal expansion mismatch between sample, middle layer and anchor clamps, at high temperature make sample be subjected to compressive stress, thereby had a strong impact on the correctness of test findings in addition; ASTM C1425-05 test fixture is used the serviceable life that meeting has reduced anchor clamps because of wearing and tearing for a long time.
Summary of the invention
The technical matters that solves
For fear of the deficiencies in the prior art part, the present invention proposes a kind of anchor clamps that are used for testing sheering property of continuous fiber reinforced composite material, can solve the room temperature anchor clamps different with the high temperature use, the problem that the test result error is big, the anchor clamps usable range is little, the life-span is short.
Technical scheme
Technical characterictic of the present invention is to comprise seaming chuck 1, lower clamp 6 and zigzag trapezoid block 7; Described seaming chuck 1 is the structure of T font for rectangular parallelepiped, the side that both sides have arc surface; The two ends of rectangular parallelepiped are provided with the lower camber side 9 of seaming chuck and the last cambered surface 10 of seaming chuck; The inside of seaming chuck 1 is provided with the seaming chuck spacer groove 8 of T font, the seaming chuck pad 2 of the built-in T font that equates with seaming chuck thickness; Described lower clamp 6 has the rectangular structure of arc surface for both sides, and one of them side is provided with thermopair patchhole 3; The centre of rectangular structure is a through hole, and the lower end of through hole is provided with rectangular pad film trap 13, a built-in lower clamp pad 5 that equates with lower clamp 6 thickness; The upper end of through hole has the rectangular parallelepiped through hole of inner arc surface 12 for both sides; The opposite side relative with thermocouple jack 3 is provided with the inclined-plane 11 near the zigzag trapezoid block; The two sides of described zigzag trapezoid block 7 are zigzag, and one side is for to face 16 directly near the sawtooth of sample, and another side is the sawtooth inclined-plane 17 near lower clamp; The lower camber side 9 of seaming chuck 1 cooperates with the 12 employing activities of the inner arc surface of lower clamp 6, and zigzag trapezoid block 7 inserts in the position on the inclined-plane 11 in the lower clamp 6, and the inclined-plane 11 of sawtooth inclined-plane 17 and lower clamp 6 matches.
Absorption one deck graphite or BN powder body material on the inclined-plane 11 in zigzag trapezoid block 7 and lower clamp 6.
Described thermocouple hole 3 has the through hole of the rectangular parallelepiped of arc surface for both sides.
The zigzag fashion of described zigzag trapezoid block 7 is that end face has square trapezoidal sawtooth.
The bevel angle 15 of described zigzag trapezoid block 7 is 12～20 °, and jaggy pitch is 0.5～1.5mm, and serration depth is 0.5～1.0mm.
Beneficial effect
The anchor clamps that are used for testing sheering property of continuous fiber reinforced composite material of the present invention when adopting anchor clamps of the present invention test, have reduced the influence of buckling effect to test findings, make experimental result more near the true shear resistance of material; When test different composite material, need not select suitable intermediate layer material, under room temperature and high temperature, use same anchor clamps, make the big raising of anchor clamps life-span, saved experimentation cost.
Description of drawings
Fig. 1: the structural drawing that is test continuous fiber reinforced composite materials anchor clamps of the present invention;
Fig. 2: the structural drawing that is seaming chuck 1 of the present invention;
Fig. 3: the structural drawing that is the seaming chuck pad;
Fig. 4: the three-dimensional structure diagram that is lower clamp;
Fig. 5: be lower clamp side-looking structural drawing
Fig. 6: the structural drawing that is the pad of lower clamp;
Fig. 7: the structural drawing that is the zigzag trapezoid block;
Fig. 8: the laciniation figure that is the zigzag trapezoid block;
The 1-seaming chuck, 2-seaming chuck pad, 3-thermopair patchhole, the 4-sample, 5-lower clamp pad, 6-lower clamp, 7-zigzag trapezoid block, 8-seaming chuck spacer groove, the lower camber side of 9-seaming chuck, the last cambered surface of 10-seaming chuck, 11-is near the inclined-plane of zigzag trapezoid block, the 12-inner arc surface, 13-lower clamp spacer groove, 14-lower clamp are near the sample inwall, and 15-zigzag trapezoid block is near the oblique angle of lower clamp, 16-faces directly near the sawtooth of sample, and 17-is near the sawtooth inclined-plane of lower clamp;
Embodiment
Now in conjunction with the embodiments, accompanying drawing is further described the present invention:
Present embodiment is used to test 2D-C
fCutting performance between the heat zone of/SiC compound substance says that the specimen configuration of setup test is of a size of 30 * 15 * 3.
The structure of present embodiment is seen Fig. 1: comprise seaming chuck 1, lower clamp 6 and zigzag trapezoid block 7.
The two sides of zigzag trapezoid block 7 are zigzag, see Fig. 7, Fig. 8.The one side of zigzag trapezoid block 7 is for to face 16 directly near the sawtooth of sample, and another side is the sawtooth inclined-plane 17 near lower clamp; The zigzag trapezoid block is 1mm with the good graphite material of greasy property, jaggy pitch, and serration depth is 1mm.The zigzag trapezoid block is shaped as trapezoid block and both sides and has square sawtooth.
The lower camber side 9 of seaming chuck 1 cooperates with the 12 employing activities of the inner arc surface of lower clamp 6, and zigzag trapezoid block 7 inserts in the position on the inclined-plane 11 in the lower clamp 6, and the inclined-plane 11 of sawtooth inclined-plane 17 and lower clamp 6 matches.
During test, at first the pad of Fig. 6 lower clamp is put among Fig. 4 in 13 notches, sample relies on lower clamp inwall 14 to place, absorption one deck graphite or BN powder body material on Fig. 4 lower clamp inclined-plane 11, then the zigzag trapezoid block is put on the lower clamp inclined-plane 11, Fig. 3 seaming chuck pad is put among Fig. 2 in 8 notches, be put into then on the lower clamp that installs sample, install on the testing machine, in lower clamp hole 3, insert thermopair.
Install on the testing machine, test.Insert thermopair at thermocouple hole 4 during high temperature.The deadweight that dependence has the zigzag trapezoid block steps up sample, prevents bending; Sawtooth on the trapezoid block is in order to reduce friction to the influence of experimental result; Adopt both sides to have the rectangular parallelepiped system of arc surface, guarantee to apply the load of single direction, and can well guarantee the efficiency of heating surface; In the chuck side face, insert thermopair and can accurately record test temperature; Leave notch at anchor clamps and sample contact position,, protect stressed anchor clamps quick-wear surface, reach the purpose that prolongs the anchor clamps life-span so that insert removable suitable material.
Claims (5)
1. anchor clamps that are used for testing sheering property of continuous fiber reinforced composite material is characterized in that comprising seaming chuck (1), lower clamp (6) and zigzag trapezoid block (7); Described seaming chuck (1) is the structure of T font for rectangular parallelepiped, the side that both sides have arc surface; The two ends of rectangular parallelepiped are provided with the lower camber side (9) of seaming chuck and the last cambered surface (10) of seaming chuck; The inside of seaming chuck (1) is provided with the seaming chuck spacer groove (8) of T font, the seaming chuck pad (2) of the built-in T font that equates with seaming chuck thickness; Described lower clamp (6) has the rectangular structure of arc surface for both sides, and one of them side is provided with thermopair patchhole (3); The centre of rectangular structure is a through hole, and the lower end of through hole is provided with rectangular pad film trap (13), a built-in lower clamp pad (5) that equates with lower clamp (6) thickness; The upper end of through hole has the rectangular parallelepiped through hole of inner arc surface (12) for both sides; The opposite side relative with thermopair patchhole (3) is provided with the inclined-plane (11) near the zigzag trapezoid block; The two sides of described zigzag trapezoid block (7) are zigzag, and one side is for to face (16) directly near the sawtooth of sample, and another side is the sawtooth inclined-plane (17) near lower clamp; The lower camber side (9) of seaming chuck (1) cooperates with inner arc surface (12) the employing activity of lower clamp (6), and zigzag trapezoid block (7) inserts in the position on the inclined-plane (11) in the lower clamp (6), and the inclined-plane (11) of sawtooth inclined-plane (17) and lower clamp (6) matches.
2. the anchor clamps that are used for testing sheering property of continuous fiber reinforced composite material according to claim 1 is characterized in that: go up absorption one deck graphite or BN powder body material on zigzag trapezoid block (7) and the inclined-plane (11) in the lower clamp (6).
3. the anchor clamps that are used for testing sheering property of continuous fiber reinforced composite material according to claim 1 and 2 is characterized in that: described thermopair patchhole (3) has the through hole of the rectangular parallelepiped of arc surface for both sides.
4. the anchor clamps that are used for testing sheering property of continuous fiber reinforced composite material according to claim 1 and 2 is characterized in that: the zigzag fashion of described zigzag trapezoid block (7) is that end face has square trapezoidal sawtooth.
5. the anchor clamps that are used for testing sheering property of continuous fiber reinforced composite material according to claim 1 and 2, it is characterized in that: the bevel angle (15) of described zigzag trapezoid block (7) is 12～20 °, jaggy pitch is 0.5～1.5mm, and serration depth is 0.5～1.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100233208A CN101603898B (en) | 2009-07-14 | 2009-07-14 | Clamp for testing sheering property of continuous fiber reinforced composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100233208A CN101603898B (en) | 2009-07-14 | 2009-07-14 | Clamp for testing sheering property of continuous fiber reinforced composite material |
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| Publication Number | Publication Date |
|---|---|
| CN101603898A CN101603898A (en) | 2009-12-16 |
| CN101603898B true CN101603898B (en) | 2011-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100233208A Expired - Fee Related CN101603898B (en) | 2009-07-14 | 2009-07-14 | Clamp for testing sheering property of continuous fiber reinforced composite material |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654440B (en) * | 2011-03-01 | 2014-04-09 | 辽宁科技大学 | Double-metal composite plate shearing strength test device |
| CN103884587A (en) * | 2013-12-04 | 2014-06-25 | 河南省煤炭科学研究院有限公司 | Tensile clamp of belt vulcanized joint and tensile tester of horizontal belt vulcanized joint |
| CN105486578A (en) * | 2016-01-13 | 2016-04-13 | 中国科学院理化技术研究所 | Sample clamping device for shear force measurement at low temperature |
| CN105865919A (en) * | 2016-05-09 | 2016-08-17 | 兰州大学 | Critical current test device for high-temperature superconducting strip under action of lateral compression |
| CN108279160A (en) * | 2018-02-13 | 2018-07-13 | 大连理工大学 | A kind of magnetic core bonded structure compression shear loads fixture and its test method |
| CN109142091B (en) * | 2018-08-13 | 2021-01-15 | 大同新成新材料股份有限公司 | Pantograph slide plate shear strength detection device and detection method thereof |
| CN109781516B (en) * | 2018-12-28 | 2024-02-02 | 东北大学 | Clamp for material strain in-situ EBSD observation test and test method |
| CN111965047B (en) * | 2020-07-07 | 2021-11-09 | 南京航空航天大学 | Composite material interlaminar shear testing device and operation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2383061Y (en) * | 1999-06-10 | 2000-06-14 | 李长忍 | Double wedge type clamp for material tester |
| US6216531B1 (en) * | 1999-11-30 | 2001-04-17 | Flexible Products Company | Testing tool adapter |
| CN2779379Y (en) * | 2004-12-24 | 2006-05-10 | 西北工业大学 | Test fixture for shear intensity of joint |
| CN201449355U (en) * | 2009-07-14 | 2010-05-05 | 西北工业大学 | Clamper for testing shearing performance of a continuous fiber-reinforced composite |
-
2009
- 2009-07-14 CN CN2009100233208A patent/CN101603898B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2383061Y (en) * | 1999-06-10 | 2000-06-14 | 李长忍 | Double wedge type clamp for material tester |
| US6216531B1 (en) * | 1999-11-30 | 2001-04-17 | Flexible Products Company | Testing tool adapter |
| CN2779379Y (en) * | 2004-12-24 | 2006-05-10 | 西北工业大学 | Test fixture for shear intensity of joint |
| CN201449355U (en) * | 2009-07-14 | 2010-05-05 | 西北工业大学 | Clamper for testing shearing performance of a continuous fiber-reinforced composite |
Non-Patent Citations (2)
| Title |
|---|
| ASTM International.Standard Test Method for Interlaminar Shear Strength of 1–D and 2–D Continuous Fiber-Reinforced Advanced Ceramics at Elevated Temperatures.《ASTM C 1425-05 Standard Test Method for Interlaminar Shear Strength of 1–D and 2–D Continuous Fiber-Reinforced Advanced Ceramics at Elevated Temperatures》.2005,1-8. * |
| ASTM International.Standard Test Method for Shear Strength of Continuous Fiber-Reinforced Advanced Ceramics at Ambient Temperatures.《ASTM C 1292-00 (Reapproved 2005) Standard Test Method for Shear Strength of Continuous Fiber-Reinforced Advanced Ceramics at Ambient Temperatures》.2005,1-9. * |
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| CN101603898A (en) | 2009-12-16 |
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