【摘要】 介绍了无网格再生核质点法(RKPM)的基本原理及其在刚塑性可压缩材料体积成型中的应用·采用罚函数满足本质边界条件,模拟了理想塑性材料的二维平面无摩擦镦粗过程,计算了不同坯料高宽比在不同可压缩因子下的变形情况,将计算结果与解析解进行比较,结果表明变形工件形状和应变参数与解析解吻合较好,应力计算的误差可能与点积分有关·模拟结果说明了再生核质点法在体积成型中应用的可行性和有效性·更多还原

【Abstract】 Introduces the principle of the meshless reproducing kernel particle method(RKPM) and its application in metal forming processes. The penalty function is used to satisfy the essential boundary conditions, with a 2D frictionless planar upsetting process simulated for ideal plastic materials. Three kinds of aspect ratio of slab are computed with different compressible factors. Comparing the computation results with the analytic solution results, it is indicated that the geometry of deformed workpiece and its strain have a proper goodness of fit with analytic solution results. The error of the calculated stress might come from the nodal integration. The results obtained from the simulation of upsetting process verified the validity of RKPM.更多还原