Limit analysis of viscoplastic thick-walled cylinder and spherical shell under internal pressure using a strain gradient plasticity theory

被引：0

作者：

李茂林 ^{[1
,2
]}

扶名福 ^{[1
]}

机构：

[1] School of Mechanical and Electrical Engineering, Nanchang University

[2] College of Civil Engineering and Architecture, Nanchang University of Aeronautics

来源：

Applied Mathematics and Mechanics(English Edition) | 2008年 / 12期

关键词：

thick-walled cylinder and spherical shell; strain gradient; nonlocal; viscoplasticity;

D O I：

暂无

中图分类号：

O345 [粘弹塑性介质力学];

学科分类号：

080102 ;

摘要：

Plastic limit load of viscoplastic thick-walled cylinder and spherical shell subjected to internal pressure is investigated analytically using a strain gradient plasticity theory. As a result, the current solutions can capture the size effect at the micron scale. Numerical results show that the smaller the inner radius of the cylinder or spherical shell, the more significant the scale effects. Results also show that the size effect is more evident with increasing strain or strain-rate sensitivity index. The classical plastic-based solutions of the same problems are shown to be a special case of the present solution.

引用

页码：1553 / 1559

页数：7