摘要
介绍了金属材料塑性本构关系的研究与应用现状,阐述了塑性本构中屈服方程和塑性位势方程的物理含义及其相互关系,分析了现有塑性本构关系用于工程材料塑性变形分析时存在的主要问题,重点分析了实验数据应用导致的预测误差、屈服方程与塑性位势相关联假设条件所导致的不能同时反映屈服和流动的问题以及数学模型和本构关系基本结构方面存在的问题,讨论了发展非理想材料（各向异性材料、压力敏感材料等）塑性本构关系亟待解决的理论和实验难题,指出了非理想材料塑性本构关系的若干发展方向。突破经典塑性力学的理论体系、建立全新的＂非关联＂各向异性材料塑性本构关系理论体系,需要在理论模型、实验方法、数值仿真及工程应用等环节开展相关研究。
The present situation of research and application of constitutive relations for metallic material was presented. Based on the physical interpretation of yielding function and plastic potential function and their interrelation,main problems in applying current plastic constitutive relations for forming of industrial materials were analyzed. Special attentions were focused on the prediction error caused by the application of experimental data,the problem of both yield and flow cannot be reflected by the assumption that the yield equation is related to the plastic potential and the problem existed in aspects of mathematical model and basic structure of constitutive relation. Both theoretical and experimental issues were discussed to overcome in developing constitutive relations for non-ideal materials,such as anisotropic and pressuresensitive material. Finally,some important issues for developing constitutive relations of non-ideal material were pointed out. In order to break through the classical theory system of plastic mechanics theory and establish a new＂non-associative＂anisotropic plastic constitutive relation theory system,it is necessary to deeply study the theoretical model,experimental method,numerical simulation and engineering application.
作者
苑世剑
何祝斌
胡卫龙
YUAN Shi-jian;HE Zhu-bin;HU Wei-long(National Key Laboratory for Precision Hot Processing of Metals,Harbin Institute of Technology,Harbin 150001,China;School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China;Institute of High Pressure Fluid Forming,Harbin Institute of Technology,Harbin 150001,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2018年第4期1-10,共10页
Journal of Plasticity Engineering
基金
国家重点研发计划资助项目(2017YFB0306300
2017YFB0304404)
国家自然科学基金资助项目(U1637209
51575131)
关键词
非理想材料
本构关系
屈服准则
塑性位势
各向异性
non-ideal materials
constitutive relation
yielding criterion
plastic potential
anisotropy
