Finite element method analysis of soil/water coupling problems using implicit elasto-plastic calculation algorithm

摘要

In this paper, we examine a new method of implicit finite element analysis of soil/water coupling problems. It consists of two main schemes: One scheme is an implicit return mapping scheme and another is a scheme which employs the consistent tangential modulus. The implicit return mapping scheme is based on the notion of the elastic-plastic operator split that consists of the elastic predictor and the plastic corrector. A tangential modulus consisting with the integration algorithm is developed for a well-known Cam-clay model for soils. Some examples of the implicit method show the high accuracy and much reducing the total CPU time.