A unified criterion for yielding behavior of metallic glasses

来源期刊：中南大学学报(英文版)2011年第1期

论文作者：宋旼 贺跃辉

文章页码：1 - 5

Key words：metallic glasses; yield criterion; unified criterion

Abstract: The yield behavior of metallic glasses was studied. Three yield criteria, including von Mises yield criterion, Mohr-Coulomb yield criterion and the unified yield criterion were used to describe the yield phenomena of the metallic glasses. Two classes of the experimental data were chosen to draw the yield loci using the unified yield criterion. It is shown that the unified yield criterion can be used to describe the yield behavior of the metallic glasses no matter whether the metallic glasses show strength- different effect or non-strength-different effect. Almost all the widely accepted yield criteria are the subsets of the unified yield criterion if the intermediate principle stress and/or the intermediate principle shear stress are not considered at all.