A study on axisymmetric indentation by the rigid-plastic finite-boundary element method

As compared with the conventional rigid-plastic finite element methods, the rigid-plastic finite-boundary element method is formulated with mixed-type. Therefore, this method possesses a merit in that it can cover the compatibility of not only nodal velocity but also nodal velocity's derivative. On the other hand, the rigid-plastic finite-boundary element method does not need repetitional calculations in any computing step. Therefore, this method possesses another merit in that there is not any divergence possibility of repetitional calculations. An axisymmetric indentation problem is analyzed by the rigid-plastic finite-boundary element method. The processes from 0% to 30% reduction in the vertical height are simulated. Contours of effective strain, effective strain rate, effective stress and shear stress, etc. are obtained successfully.