Method for testing out-of-plane tensile failure of cementing piece
A technology for failure testing and adhesive joints, which is applied in the direction of applying stable tension/pressure to test material strength, measuring devices, instruments, etc., and can solve problems such as failure analysis of interlayer resin layers and external tensile failures
Pending Publication Date: 2021-05-14
NEW UNITED GROUP
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Problems solved by technology
[0004] Special shapes based on arc-shaped double-sheet connected nodes, such as figure 1 As shown, the existing technology can only conduct out-of-plane tensile failure analysis for flat composite material specimen 01, and cannot perform out-of-plane tensile failure analysis for the interlaminar resin layer of the arc-shaped double-sheet connection node
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[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0056] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0057] Please refer to Figure 1 to Figure 10 , figure 1 It is a test fixture for out-of-plane tension of a composite material in the prior art; figure 2 A schematic diagram of the assembly of the adhesive joint ...
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The invention discloses a method for testing out-of-plane tensile failure of a cementing piece. The method comprises the following steps of S1, adhering a bottom layer of a to-be-tested cementing piece to an auxiliary body with the adhesive strength that an out-of-plane tensile failure load is greater than a first out-of-plane tensile failure load, wherein the first out-of-plane tensile failure load is an interlayer out-of-plane tensile failure load between a bottom layer and a surface layer of the to-be-tested cementing piece; S2, pulling the surface layer of the to-be-tested cementing piece towards one side far away from the auxiliary body; and S3, obtaining the maximum tension applied to the to-be-tested cementing piece when the surface layer is separated from the bottom layer. The method for testing the out-of-plane tensile failure of the cementing piece can realize interlayer out-of-plane tensile failure analysis of the interior of the to-be-tested cementing piece, and is not restrained by the shape and the size of the to-be-tested cementing piece.
Description
technical field [0001] The invention relates to the field of composite materials, in particular to a test method for out-of-plane tensile failure of adhesive joints. Background technique [0002] In the carbon fiber circular tubular truss structure, arc-shaped double-piece connection nodes are often used as pipe connection nodes. The arc-shaped double-piece connection node includes an arc surface and fins arranged on the arc surface; the arc surface is used for bonding with the chord of the carbon fiber circular tubular truss structure, and the fins are used for bonding with the web bar of the carbon fiber circular tubular truss structure catch. Whether it is a cambered surface or a fin, adhesives are usually used to achieve adhesive fixation with the chord and the web respectively. [0003] The arc-shaped double-piece connection node is formed by co-curing after laying up multi-region resin-based carbon fiber composite materials. Therefore, considering the failure mechan...
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CPCG01N3/08G01N2203/0003G01N2203/0017
Inventor 刘晶周立成张鹏李萍徐铭相海军徐建东
Owner NEW UNITED GROUP