A new formulation for solving elastoplastic frictional contact problems by
the boundary element method using non-conforming discretization is presente
d. The initial strain approach, together with the von Mises yield criterion
is adopted. Two different methods are developed for the evaluation of the
contact parameters. The first utilizes the local interpolation functions to
approximate the contact parameters at the non-nodal contact points. In the
second method proposed the unknowns at these contact points are computed b
y the boundary integral displacement equation, which contains a strongly si
ngular integral, or the boundary integral traction equation, which has a hy
per-singular integral. The resulting system of equations includes the unkno
wns of a node within the contact zone of one body expressed in terms of all
nodal Values of tractions and displacements of the other body. Comparisons
is made between the new approaches and conforming discretization. Copyrigh
t (C) 2000 John Wiley & Sons, Ltd.