具有应变硬化行为的弹塑性材料多道次等通道转角挤压有限元模拟

Finite Element Simulation of Multi-Pass Equal Channel Angular Extrusion of Elastic-Plastic Material with Strain Hardening

用有限元模拟方法研究了具有应变硬化行为的弹塑性材料的多道次(至多4道次)等通道转角挤压变形行为。结果表明,随着挤压道次增加,塑性变形区尺寸和对称性增加,拐角缝隙越来越小;按A路径挤压时,应变均匀性越来越差,最大塑性应变区随挤压道次增加向试样前上端移动;按C路径挤压时,应变均匀性越来越好,最大塑性应变区位于试样中心部位;挤压道次相同时,C路径累积最大塑性应变值比A路径要小。

The deformation behavior of multi-pass(up to four passes) equal channel angular extrusion of elastic-plastic material with strain hardening was investigated by Finite element simulation.The results show that the size and symmetry of the plastic deformation zone increase and the corner gaps decrease when ECAE pass is increased.With the increase of ECAE pass via route A,the homogeneity in equivalent plastic strain decrease and the largest plastic strain zone moves towards the front-top part of the specimen.Ho...