摘要
等径侧向挤压可以使材料反复变形，使应变逐渐积累，最后得到很大的应变量，从而降低材料的晶粒尺寸，得到细晶材料．然而如何计算不同变形方式的应变量，将应变量与晶粒尺寸联系起来需要深入研究．本文对等径侧向挤压过程中的等效应变分布进行了有限元数值模拟，并将模拟计算结果与几何分析法计算结果进行了比较，得出等径侧向挤压过程材料的变形规律和等效应变的计算方法，为进一步研究建立了基础．
Material can be deformed repeatedly by using eqUal-cross section lateral extrision, which makes the strain accumulated gradually and very very large. Then the grain size of the material can be reduced to obtain ultra- fine grain material. However, it is necessary to further study how to calculate the strain of lateral extrusion in differ-ent ways and how to relate strain value to grain size. The strain distribution of equal-cross section lateral extrusion has been simulated by finite element method.Comparing calculated results with geometry analysis resultS made it possible for us to know more about strain changes and calculating methods.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
1999年第3期65-67,共3页
Journal of Harbin Institute of Technology
基金
哈尔滨工业大学校基金
关键词
等径侧向挤压
有限元模拟
应变
等效应变
Equal-cross section lateral extrusion
finite element simulation
strain
equivalent strain
