Test and simulation analysis of mechanicalproperties for joint of carbon fiber composites

The mechanical properties of T800/924 composite joints under tensile loading were studied by means of test and simulation analysis. The tensile test of the joint specimen was carried out on the electronic universal testing machine. The failure process of the specimen was recorded during the test and the final failure load was obtained. A nonlinear finite element method was used, based on the ABAQUS software platform, using the embedded material user defined subroutine (VUMAT). The finite element analysis model for the test was established to obtain the strain distribution of the joint, and the calculated value of the joint failure load was given. The results show that the calculation prediction of the damage parts for the joint are in agreement with the test. The difference values between calculated value and test value of the failure load are small. The feasibility of the simulation analysis method is proved. The results analysis show that hole edge is where the stress concentrated. The damage is usually initiated from hole edge and the ability of out-of -plane loaded of joint is poor. Failure mode of joint is generally the pull-out of hole edge surface.