A COMBINED PROGRAMMING AND ITERATION ALGORITHM FOR FINITE-ELEMENT ANALYSIS OF 3-DIMENSIONAL CONTACT PROBLEMS

Comparing with two-dimensional contact problems, three-dimensional fri ctional contact problems are more difficult to deal with, because of t he unknown slip direction of the tangential force and enormous computi ng time. In order to overcome these difficulties, a combined PQP (Para metric Quadratic Programming) and iteration method is derived in this paper. The iteration algorithm, which alleviates the difficulty of unk nown slip direction, is used along with the PQP method to cut down com puting costs. Numerical example is given to demonstrate the validity o f the present algorithm.