Research on Influence Factors for Residual Strengths of Fiber Metal Laminates in Rivet

被引：0
|
作者：
Cheng L. [1 ]
Ping X. [1 ,2 ]
Wang C. [1 ]
Guo Q. [1 ]
机构：
[1] School of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin
[2] School of Mechanical and Electronical Engineering, East China Jiaotong University, Nanchang
来源：
Zhongguo Jixie Gongcheng/China Mechanical Engineering | 2019年 / 30卷 / 19期
关键词：
Damage criterion; Fiber metal laminate; Progressive failure; Rivet;
D O I：
10.3969/j.issn.1004-132X.2019.19.008
中图分类号：
学科分类号：
摘要：
In order to study coupled damage of fiber metal laminates in a riveted single lap joint, a progressive failure model for fiber metal laminates was established by using the Johnson-Cook failure criterion for metal, the 3D Hashin damage criterion for fiber reinforced composites, the traction-seperation law for interface delamination and the stiffness degeneration theory of composites. The effectiveness of the present models were verified by experiments. The effects of the secondary bending, aluminum alloy fraction, pretightening forces, hole-edge distances on riveting strength and failure mode of fiber metal laminates were investigate to provide feasible suggestions for the design of riveted single lap joints of fiber metal laminates. The following conclusions are drawn: (1)The secondary bending speeds up laminate damage and reduces the riveting strength of laminates, and medium eccentric loading may weaken secondary bending and improve riveting strength better; (2)The increase of aluminum alloy fraction may improve the residual strength of laminates, but when it is greater than 50%, the specific stiffness and strength of the laminates will decrease; (3)The increase of pretightening forces may delay the damage initiation of fiber and matrix, and enhance strength of the riveted joint, thus improving the damage resistance of laminates; (4)With the increasing of the hole-edge distance, the residual strength of the riveted joint is improved, and the failure mode transform from catastrophic net-tension failure mode gradually into an ideal crushing failure mode, but when the hole-edge distance reaches a certain value, the residual strength is no longer significantly improved, and the laminate maintains crushing failure modes. © 2019, China Mechanical Engineering Magazine Office. All right reserved.
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页码：2319 / 2328
页数：9
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