Clamp for testing mode I interlaminar fracture toughness in double-cantilever beam stretching test

A technology of interlaminar fracture toughness and tensile test, which is applied in the direction of applying stable tension/pressure to test material strength, measuring device, strength characteristics, etc. effect used

Inactive Publication Date: 2019-10-22
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] To study the mode I fracture toughness of composite bonded structures, it is necessary to use the double cantilever beam test for testing. The existing double cantilever beam load transfer components mostly use loading blocks or piano hinges, but these two tes

Method used

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  • Clamp for testing mode I interlaminar fracture toughness in double-cantilever beam stretching test
  • Clamp for testing mode I interlaminar fracture toughness in double-cantilever beam stretching test
  • Clamp for testing mode I interlaminar fracture toughness in double-cantilever beam stretching test

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Embodiment Construction

[0021] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0022] refer to Figure 1-4 As shown, the fixture for double cantilever beam tensile test of the present invention to test type I interlaminar fracture toughness includes an upper clamping mechanism 1 and a lower clamping mechanism 2 with the same structure and mirror image distribution, and the upper clamping mechanism 1 includes :

[0023] The clamped part 11, one end is clamped on the testing machine (not shown in the figure), and the other end of the clamped part 11 is symmetrically provided with two first lugs 12, each first lug 12 There is a first through hole 13;

[0024] The clamping part 14 is provided with a second lug 18 at one end, ...

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Abstract

The present invention discloses a clamp for testing the mode I interlaminar fracture toughness in a double-cantilever beam stretching test. The clamp includes an upper clamping mechanism and a lower clamping mechanism which are of the same structure and are in mirror-image distribution; the upper clamping mechanism comprises a clamped portion, a clamping portion and a pin; one end of the clamped portion is held on a test machine, and the other end of the clamped portion is symmetrically provided with two first lugs; a first through hole is formed in each first lug; one end of the clamping portion is provided with a second lug; a second through hole is formed in the second lug; the other end of the clamping portion is connected with the end portion of one side of a test piece through an adhesive; the pin penetrates the first through holes and the second through hole; the second through hole is located between the two first through holes; two ends of the pin are in threaded connection with nuts; and the nuts abut against two sides of the clamping portion. With the clamp of the present invention adopted, the clamping and use of the testing machine can be facilitated, and it can be ensured that load applied in a stretching process does not deviate and is uniformly distributed.

Description

technical field [0001] The invention relates to the technical field of fixtures, in particular to a fixture for testing mode I interlaminar fracture toughness in a double cantilever beam tensile test. Background technique [0002] At present, composite materials are widely used in aerospace, new energy vehicles and weapons and military fields. Adhesive bonding is a commonly used connection method for composite materials, which has the advantages of strong structure, fatigue resistance, and high connection efficiency. Therefore, the research on the strength of composite bonded structures has very important theoretical value and engineering significance. [0003] To study the mode I fracture toughness of composite bonded structures, it is necessary to use the double cantilever beam test for testing. The existing double cantilever beam load transfer components mostly use loading blocks or piano hinges, but these two test fixtures have the following disadvantages: Although the...

Claims

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Application Information

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IPC IPC(8): G01N3/04G01N3/08
CPCG01N3/04G01N3/08G01N2203/0017G01N2203/0067G01N2203/0429
Inventor 彭雄奇彭超
Owner SHANGHAI JIAO TONG UNIV
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