Three-dimensional Finite Element Analysis of Damage Evolution in Bolted Joints of CFRP Laminates
This study investigates the damage evolution in bearing failure of CFRP bolted joints. For this purpose, we present a three-dimensional finite element analysis to reproduce the damage evolution of CFRP bolted joints. First, we conduct the experiment of the bearing failure in bolted joints of CFRP laminates. The ply damage and the interlaminar delaminaiton are successively generated, and these damages lower the supportable load of the joints. The bearing strength of bolted joints depends on lateral clamping force, which suppresses the out-of-plane deformation of the laminates. To understand the underlying mechanism of these experimental results, a numerical model is constructed for the simulation of damage evolution in bolted joints. In this model, in addition to the in-plane damage, delamination is represented by cohesive elements and fiber kinking damage is addressed by the transverse shear stress criterion. According to the simulated results, the maximum load is governed by the kinking onset, and repeated load drops are caused by repeated kinking spread. As a result, the bearing strength is closely related to the kinking initiation and propagation.
Composite Material Finite Element Analysis Failure Mechanism Bearing Failure Mechanically Fastened Joints
Takeaki NADABE Masaaki NISHIKAWA Tatsuya NAKAMURA Nobuo TAKEDA
Department of Advanced Energy, The University of Tokyo, Mail Box 311, 5-1-5 Kashiwanoha, Kashiwa-shi Department of Aeronautics and Astronautics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Department of Advanced Energy, The University of Tokyo, Mail Box 311, 5-1-5 Kashiwanoha, Kashiwa-shi
国际会议
北京
英文
1-4
2008-10-23（万方平台首次上网日期，不代表论文的发表时间）