实心圆轴扭转测定本构关系的概念和方法  

The Concept and Method for Determining the Constitutive Law of Materials by Torson Test with Cylindrical Specimens

作　　者：何蕴增 邹广平 

机构地区：[1]哈尔滨工程大学数力系,哈尔滨150001

出　　处：《实验力学》2003年第3期426-432,共7页Journal of Experimental Mechanics

摘　　要：本文提出了实心圆轴扭转试验建立有限应变本构关系(τ-γ曲线)的概念,并在文[1]工作的基础上完成了通过实心圆轴扭转试验建立文献[6]形式的有限应变本构关系的方法.它比单向拉伸试验所得到的本构关系更为精确.因拉伸实验变形较大时试件伸长和变细对测量结果有影响,尤其在"颈缩"后,很难对有关力学量作有效测量和分析.扭转本构关系的描绘也更为完整.以低碳钢为例,扭转本构关系所描述的有效范围比拉伸本构关系大十余倍.本文方法将有利于探讨研究更大应变下的材料力学行为.A method for determining Finitestain constitutive relationship in form [6] by torson test with cylindrical specimens on the base of the works of article [1] is presented. A torsion test with solid circular shafts is proposed in the article. Because the specimen may become necking under axial tension, it′s difficult to make an effective measurement and analysis for the mechanical property of materials in large strain range by tension test, and this method is a suitable choice.It could benefit for the exploring and researching on the mechanical property of the large strain material.

关 键 词：有限应变 本构关系 实心圆轴 扭转试验 材料力学 剪应力 角应变 塑性力学 

分 类 号：TB302.3[一般工业技术—材料科学与工程] O344[理学—固体力学]