INFLUENCE OF PRE-TENSION ON TORSION OF MICROSCALE CU WIRES: A STUDY VIA STRAIN GRADIENT THEORY

被引：0

作者：

Ma, Xinbing ^{[1
]}

Liu, Jinxing ^{[1
]}

机构：

[1] Jiangsu Univ, Fac Civil Engn & Mech, Zhenjiang, Jiangsu, Peoples R China

来源：

JOURNAL OF THEORETICAL AND APPLIED MECHANICS | 2019年 / 57卷 / 04期

基金：

美国国家科学基金会;

关键词：

nonproportional loading; strain gradient plasticity; size effect; cyclic response; THIN METAL WIRES; PLASTICITY; FATIGUE;

D O I：

10.15632/jtam-pl/112461

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Nonproportional plastic deformations on the microscale are an emerging topic. A simplified theory of strain gradient elasto-plasticity is developed to study the evolution of yield strength in a copper wire sequentially experiencing tension and torsion. The pre-tension deformation and stress are inherited to the upcoming torsion process, resulting in a nonproportional loading condition. With consideration of the extra hardening effect due to strain gradient, pre-tension weakens the extra hardening effect of the strain gradient and the dependence on the wire radius. Cyclic torsion behavior is also investigated. Anomalous Bauschinger effect and plastic softening are found.

引用

页码：1055 / 1065

页数：11

共 19 条

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