An Accelerated Iterative Procedure with Constant Stiffness for the Analysis of Elastic Contact Problems
Sun Linsong(1), Wang Dexin(2)
(1 Hydraulic & Civil Engineering College of Yangzhou Univ., Yangzhou,225009) 
(2 Civil Engineering College of Hohai Univ., Nanjing, 210098)

Abstract: A gap-load was used in the analysis of elastic contact problems to indicate the change of contact state. In the study, the re-forming of stiffness matrix was avoided and an iterative procedure with constant stiffness was presented . Furthermore, using Steffensen technology for fix-point iteration, an acceleration algorithm was carried out. In the end of this paper, some numerical examples illustrated the effectiveness of the presented method. 
Keywords: Contact, iterative method, constant stiffness, acceleration algorithm, FEM.