Research on Elasto-plastic Contact with Friction Multipole BEM and Rolling Process

It is a highly nonlinear problem of 3-D elastoplastic contact with friction. To obtain the key information about the real size, displacement and traction in contact zone, the elements in contact and plastic zone should be subdivided. However, the increase of degrees of freedom is limited by the problem-solving scale when traditional BEM is used, for a larger memory size is required and the solution procedure costs too long CPU time. In this paper, based on 3-D elasto-plastic contact with friction Multipole BEM adopting Mathematical Programming, we developed the latest 3-D elasto-plastic contact with friction Multipole BEM and source Programs, and numerical experiment is carried out. Numerical experiment shows that with this new method, the need of computer memory size is only one hundredth of the traditional one, which makes the large-scale computing of subdivided elements possible and improves the computational precision.