Finite Element Method (FEM) is a numeric calculation method which has developed with the development tide of computer in the beginning of 1960s and centralized multiple disciplines such as elasticity, mechanics, electromagnetic, thermodynamics and computing technique. FEM becomes a general simulation method to resolve logistic equations of different fields step by step in the last several years with its special flexibility, celerity and effectivity. Not only FEM can solve the elastic (linear or nonl...