Harten-Lax-van Leer-contact(HLLC)approximation Riemann solver with elastic waves for one-dimensional elastic-plastic problems

摘要

A Harten-Lax-van Leer-contact(HLLC) approximate Riemann solver is built with elastic waves(HLLCE) for one-dimensional elastic-plastic flows with a hypoelastic constitutive model and the von Mises' yielding criterion. Based on the HLLCE,a third-order cell-centered Lagrangian scheme is built for one-dimensional elastic-plastic problems. A number of numerical experiments are carried out. The numerical results show that the proposed third-order scheme achieves the desired order of accuracy. The third-order scheme is used to the numerical solution of the problems with elastic shock waves and elastic rarefaction waves. The numerical results are compared with a reference solution and the results obtained by other authors. The comparison shows that the presented high-order scheme is convergent, stable, and essentially non-oscillatory. Moreover,the HLLCE is more efficient than the two-rarefaction Riemann solver with elastic waves(TRRSE).