半球形凸模拉深过程的动力显式有限元分析  

Dynamic explicit finite element analysis of hemispherical punch deep drawing

作　　者：刁法玺[1] 张凯锋[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,哈尔滨150001

出　　处：《塑性工程学报》2003年第6期15-18,37,共5页Journal of Plasticity Engineering

摘　　要：本文基于连续介质力学及有限变形理论 ,建立了用于三维板料成形过程分析的有限元模型 ,开发了动力显式算法的板料成形过程模拟的有限元分析程序DESSFORM3D。采取集中质量矩阵 ,用动力显式积分的方法 ,使位移计算显式化 ,避免了由材料、几何、边界条件等高度非线性因素引起的计算收敛问题。对半球形凸模拉深过程进行模拟计算 ,并把模拟结果与实验结果进行对比 。Based on the continuum mechanics and finite deformat io n theory, a finite element model for simulating the three-dimensional sheet for ming process has been established. A finite element analysis program DESSFORM3D for the simulation of sheet forming process using dynamic explicit algorithm is developed. In integration, the dynamic explicit algorithm has been used with the lumped mass matrix so that it facilitates the calculation of the displacement and avoids the convergence p roblem caused by high order nonlinearity of material, geometry and boundary cond itions. The hemispherical punch deep drawing of a square sheet is analyzed. The results of simulation are compared with that of experiment to verify the calcula ted results of the program.

关 键 词：板料成形 动力显式 有限元法 拉深 起皱 

分 类 号：TG30[金属学及工艺—金属压力加工] TG386.32