Evaluation of the T-stress for cracks in functionally graded materials by the FEM

被引：14

作者：

Sladek, J. ^{[1
]}

Sladek, V. ^{[1
]}

Repka, M. ^{[1
]}

Tan, C. L. ^{[2
]}

机构：

[1] Slovak Acad Sci, Inst Construct & Architecture, Bratislava 84503, Slovakia

[2] Carleton Univ, Dept Mech & Aerosp Engn, Ottawa, ON, Canada

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 2016年 / 86卷

关键词：

INTENSITY FACTORS; FRACTURE; BOUNDARY; TERM; COMPUTATION;

D O I：

10.1016/j.tafmec.2016.09.004

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Using the quarter-point crack tip element, a simple formula is derived which provides a quick and expedient means to evaluate the elastic T-stress in the finite element method (FEM) fracture mechanics analysis of functionally graded materials (FGMs). The formula is derived by comparing the variation of displacements in the quarter-point element with the corresponding asymptotic expression for the displacement field in the vicinity of a crack-tip. The asymptotic fields in the crack-tip vicinity in a FGM with continuously varying material properties are the same as in a homogeneous one. The simplicity of the use of this formula for T-stress evaluation in FEM fracture mechanics analysis is demonstrated by its application to some transient elastodynamic and thermoelastic problems. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：332 / 341

页数：10

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