摘要
采用二维刚粘塑性有限元模型对某钛合金叶片典型部位的变形过程进行了数值模拟,通过流线分析揭示了叶片典型部位的变形模式,通过应变和应变速率分析揭示了其变形的不均匀性。通过对比分析,指出该叶片成形过程不同部位等效应变相对差别达50%以上,应变速率的波动范围从10-3s-1到10-2s-1,提出应变差别和应变速率的差别可能对成形叶片的显微组织和力学性能存在一定的影响,并经试验进行了验证。
Deformation process of typical sections on a Ti-alloy blade is simulated with 2-D rigid-viscoplastic finite element model. Deformation pattern of the sections is disclosed by flownet analysis. Deforming non-uniformity is presented by strain and strain rate analysis. Through comparison, the relative difference in effective strain among different positions on the blade is higher than 50% and the strain rate ranges from 10 -3s -1 to 10 -2s -1. It is concluded that the strain and strain rate difference has a certain effect on the microstructure and mechanical properties of the blade, which is verified by experiment.
出处
《锻压技术》
CAS
CSCD
北大核心
2005年第2期56-59,共4页
Forging & Stamping Technology
