Numerical simulation of residual strain/stress for composite laminate during overall curing process

The process induced residual strain/stress of composite laminated plate with aluminum plate was numerically simulated by commerce software. Finite element analysis was used to simulate thermal-chemical model of composites laminated plate, and finite difference method was employed to calculate its cure kinetics model during curing process. The strong coupled relation between cure kinetics model and thermal-chemical model was expected to consider by setting minionum time step in finite difference method. Chemical shrinkage was applied to composite materials as an initial strain for each time increment in residual stress simulation residual strain/stress of composite laminated plate with aluminum plate was successfully simulated on the basis of the mentioned technology. Moreover, history of residual strain/stress at along fiber orientation and vertical fiber orientation of composite material were analyzed. Compared to deflection of laminate in test, the validity of the results calculated by model was proved.