EVALUATION OF DUCTILE FRACTURE CRITERIA IN A GENERAL THREE-DIMENSIONAL STRESS STATE CONSIDERING THE STRESS TRIAXIALITY AND THE LODE PARAMETER

This paper is concerned with evaluation of various ductile fracture criteria in a general three-dimensional stress state of stress triaxiality, the Lode parameter and the equivalent plastic strain to fracture. Evaluation is carried out by comparing fracture loci constructed by fracture criteria to e...

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Bibliographic Details
Published inActa mechanica solida Sinica Vol. 26; no. 6; pp. 642 - 658
Main Authors Lou, Yanshan, Huh, Hoon
Format Journal Article
LanguageEnglish
Published Singapore Elsevier Ltd 01.12.2013
Springer Singapore
School of Mechanical, Aerospace and Systems Engineering, KAIST, 335, Gwahangno, Daeduk Science Town,Daejeon, 305-701, South Korea
Subjects
alloys
Classical Mechanics
Criteria
Cut-off
Ductile fracture
ductile material
Engineering
fracture
fracture locus
Fracture mechanics
metal forming
Mohr-Coulomb准则
Strain
Stresses
Surfaces and Interfaces
Theoretical and Applied Mechanics
Thin Films
Three dimensional
Triaxiality
三向应力状态
三维应力状态
三轴
等效塑性应变
股东
评估
韧性断裂准则
alloys
fracture locus
metal forming
ductile material
fracture
Online AccessGet full text
ISSN0894-9166
1860-2134
DOI10.1016/S0894-9166(14)60008-2

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Summary:This paper is concerned with evaluation of various ductile fracture criteria in a general three-dimensional stress state of stress triaxiality, the Lode parameter and the equivalent plastic strain to fracture. Evaluation is carried out by comparing fracture loci constructed by fracture criteria to experimental results of Al2024-T351. Comparison demonstrates that the Modified Mohr-Coulomb criterion and a newly proposed criterion provide sufficient predictability of fracture strain. Moreover, evaluation is emphasized on the predicted cut-off value for stress triaxiality. The evaluation demonstrates that the Cockcroft-Latham, Brozzo, Oh, Ko-Huh and the new criteria coupled a reasonable cut-off value for ductile materials.
Bibliography:Yanshan Lou,Hoon Huh （School of Mechanical, Aerospace and Systems Engineering, KAIST, 335, Gwahangno, Daeduk Science Town, Daejeon, 305-701, South Korea）
42-1121/O3
This paper is concerned with evaluation of various ductile fracture criteria in a general three-dimensional stress state of stress triaxiality, the Lode parameter and the equiva- lent plastic strain to fracture. Evaluation is carried out by comparing fracture loci constructed by fracture criteria to experimental results of A12024-T351. Comparison demonstrates that the Modified Mohr-Coulomb criterion and a newly proposed criterion provide sufficient predictabil- ity of fracture strain. Moreover, evaluation is emphasized on the predicted cut-off value for stress triaxiality. The evaluation demonstrates that the Cockcroft-Latham, Brozzo, Oh, Ko-Huh and the new criteria coupled a reasonable cut-off value for ductile materials.
fracture, alloys, ductile material, fracture locus, metal forming
ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0894-9166
1860-2134
DOI:10.1016/S0894-9166(14)60008-2