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Bending of bilateral butt joints using progressive damage model


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Bending of bilateral butt joints using progressive damage model
Shi Xiaohong1Chen Haili2Zhou Guangming2Wang Xinfeng2Feng Weichao2
1.The Sixtieth Institute of the Headquarters of the General,Nanjing 210016,China; 2.State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China
composite joints bending strength progressive damage overlap parameters
In order to study the influence of overlap length and thickness on the bending of bilateral butt joint,the software Abaqus is used for the progressive damage analysis.The method is built based on the three-dimensional progressive damage analysis(PDA)and the cohesive zone model(CZM).The constitutive equations for composite programmed by User-defined Material Mechanical Behavior(UMAT)subroutine and Cohesive Contact method are used to simulate respectively the damage progression in composites and that in the adhesive interface.The bending strength and damage process of joints are obtained.The results show,the strength of joints can be increased with the increase of the overlap length and may change little when the length reaches a definite value.But its strength increases at the beginning and decreases with increasing the overlap thickness.The results can provide reference material for the design of joints during bending.


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Last Update: 2014-08-31