Mohr-Coulomb屈服准则与Drucker-Prager屈服准则在块体非晶合金中的应用  

Applications of Mohr-Coulomb yield criterion and Drucker-Prager yield criterion in bulk amorphous alloys

作　　者：邹萍[1] 钟鸣[1] 龙志林[1] 陈舒敏[1] 廖光开 杜雪林[1] 

机构地区：[1]湘潭大学土木工程与力学学院,湘潭411105

出　　处：《中国有色金属学报》2015年第5期1200-1208,共9页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51471139;51071134);湖南省自然科学基金重点项目(12JJ2024);湖南省研究生科研创新项目(CX2014B278)

摘　　要：推导Mohr-Coulomb(M-C)和Drucker-Prager(D-P)屈服准则在不同应力状态下的表达式以及它们之间的相互关系;基于文献数据,比较两个准则描述块体非晶合金屈服行为的适应性,详细地阐述了正应力与静水压力对块体非晶合金屈服行为的影响。结果表明:静水压力对材料屈服的影响相当于一个叠加的正应力,无论是压缩还是拉伸,均对剪切屈服或断裂起抑制作用。D–P屈服准则函数描述块体非晶合晶的屈服断裂比M–C准则更好。The expressions and relationships of the Mohr？Coulomb （M？C） and Drucker？Prager （D？P） yield criteria under various stress states were derived firstly, and the yield behavior adaptabilities of bulk amorphous alloys described by the two criteria were compared based on the data of literatures. Finally, effects of normal stress and hydrostatic pressure on the yield behavior of BAAs were intelligently demonstrated. The results show that the influence of hydrostatic pressure on the yield behavior of BAAs is equivalent to a superposition of normal stress under tensile or compressive load, and either the shear yielding or fracture is inhibited by hydrostatic pressure; The D–P criterion is more suitable for explaining the yielding of BAAs than M–C yielding criterion.

关 键 词：块体非晶合金 MOHR-COULOMB屈服准则 Drucker-Prager屈服准则 正应力 静水压力 

分 类 号：TG139.8[一般工业技术—材料科学与工程]