Study of Plastic Shear Localization via the Flow Theory of Mechanism-Based Strain Gradient Plasticity

被引：4
|
作者：
Shi, Z.
Huang, Y. [1 ,2 ]
Song, J. [4 ]
Hwang, K. C. [3 ]
Li, M. [5 ]
机构：
[1] Northwestern Univ, Dept Civil & Environm Engn, Evanston, IL 60208 USA
[2] Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA
[3] Tsinghua Univ, Dept Engn Mech, FML, Beijing 100084, Peoples R China
[4] Univ Miami, Dept Mech & Aerosp Engn, Coral Gables, FL 33146 USA
[5] Alcoa Tech Ctr, Alcoa Ctr, PA 15069 USA
来源：
JOURNAL OF ENGINEERING MECHANICS | 2009年 / 135卷 / 03期
关键词：
Shear flow; Plasticity; Material properties; LENGTH SCALE PARAMETER; CRACK-TIP FIELD; POSTLOCALIZATION BEHAVIOR; SINGLE-CRYSTALS; DEFORMATION; INDENTATION; FRACTURE; HARDNESS; BANDS; MODEL;
D O I：
10.1061/(ASCE)0733-9399(2009)135:3(132)
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The plastic shear localization is studied via the flow theory of mechanism-based strain gradient plasticity. The shear strain rate displays a rather sharp decrease from the center to the boundary of shear band, and gradually approaches the uniform remote shear strain rate outside the shear band. The shear band thickness obtained analytically is linearly proportional to the (length of) Burgers vector, and also depends on the softening modulus and mesoscale cell size. The maximum shear strain rate in the shear band, however, is sensitive to other material properties such as the ultimate tensile strength and intrinsic material length in strain gradient plasticity.
引用
收藏
页码：132 / 138
页数：7
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