A new method for cyclic crack-tip plastic zone size determination under cyclic tensile load

被引：22

作者：

Chen Jingjie ^{[1
]}

Huang Yi ^{[1
]}

Dong Leilei ^{[1
]}

Li Yugang ^{[2
]}

机构：

[1] Dalian Univ Technol, Sch Naval Architecture, Dalian 116024, Liaoning, Peoples R China

[2] Dalian Univ Technol, Deepwater Engn Res Ctr, Dalian 116024, Liaoning, Peoples R China

来源：

ENGINEERING FRACTURE MECHANICS | 2014年 / 126卷

基金：

中国国家自然科学基金;

关键词：

Cyclic plastic zone size; Maximum crack opening displacement; Variable quantity of maximum crack opening displacement; Center cracked plate; Finite element analysis; FINITE-ELEMENT-ANALYSIS; FATIGUE-CRACK; CLOSURE; STRESS; GROWTH; STEEL;

D O I：

10.1016/j.engfracmech.2014.05.001

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This paper presents a new method to determine the cyclic crack-tip plastic zone size (CTPZS) in the center cracked plate subject to cyclic tensile load. The maximum crack opening displacement (MCOD) and the variable quantity of MCOD (VMCOD) are used to estimate cyclic CTPZS in this method. Based on the series of calculation results by finite element analysis, an explicit expression of cyclic CTPZS versus MCOD and VMCOD is fitted by the least square method. The expression enables to eliminate the influences of crack geometry, plate sizes, elastic modulus, yield stress, plane state, stress ratio, overload ratio and load sequence. Therefore, the presented method is suitable for center cracked finite plate models with different material under cyclic tensile load. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：141 / 154

页数：14

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