Static-explicit FE modeling of 3-d large deformation multibody contact problems on parallel computer

A static-explicit method is employed to simulate static or quasi-static multi-deformation-body contact problems with friction. Based on the characteristics of the explicit time integration algorithm, a reliable and efficient contact element strategy is developed to handle the multi-deformation-body contact with friction. The friction behaviour is governed by the Coulomb friction model with an additional limit on the allowable shear stress, which is treated as a flow plasticity rule. The penalty method is adopted to impose the normal and the sticking contact. Meanwhile, with choosing contact interfaces as sub-domain boundaries, a parallel algorithm for contact is proposed based on domain decomposition method and implemented for the large scale computation. In addition, a contact searching algorithm is also introduced. Finally, numerical examples of contact between finite deformation bodies are presented to show the efficiency and stability of this algorithm