拉伸曲线及形变硬化指数在塑性加工中的应用与探讨  

The Application of Stress Strain Curve and Strain-hardening Exponent in Plastic Working

作　　者：杨明[1,2] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025 [2]贵州省材料与结构强度重点实验室,贵州贵阳550025

出　　处：《现代机械》2013年第4期20-22,共3页Modern Machinery

基　　金：贵阳市科技攻关项目资助(2010筑科Ⅰ合同字第1-70号);遵义钢绳股份有限公司校企合作项目

摘　　要：本文从探讨影响材料加工性能的因素出发,论述了塑性材料在轴向拉伸条件下变形过程的力学行为,阐明了应变硬化、最大均匀真塑性应变、应变硬化指数的相互关系。通过真应力真应变曲线确定应变硬化指数,明确其数值与材料拉伸变形时的最大均匀应变相等,是衡量材料塑性均匀变形能力的力学指标。To figure out the influencing factors of processing performance of materials, the mechanical behavior in ax- ial tensile deformation process of plastic materials was discussed. The interrelationship of strain hardening, maximum uni- formity true plastic strain and strain hardening factor was clarified. The value of strain hardening factor, which was deter- mined by true stress-true strain curves and equaled to the value of maximum uniformity strain in tensile deformation, is a key mechanical factor to measure the plastic uniformity deformation ability of materials.

关 键 词：真应力 真应变 形变硬化指数 塑性加工 

分 类 号：O344.1[理学—固体力学]