Effect of viscosity on cavity growth in ductile damage

被引：1
|
作者：
Fabregue, D. [1 ]
Bouaziz, O. [2 ]
Maire, E. [1 ]
机构：
[1] Univ Lyon, INSA Lyon, MATEIS CNRS UMR5510, F-69621 Villeurbanne, France
[2] Arts & Metiers ParisTech, LEM3, UMR CNRS 7239, F-57045 Metz 01, France
来源：
MECHANICS OF MATERIALS | 2015年 / 89卷
关键词：
Damage; Growth; X-ray tomography; Viscoplasticity; Modelling; DUAL-PHASE STEELS; TRIAXIAL STRESS-FIELDS; X-RAY MICROTOMOGRAPHY; VOID GROWTH; TOMOGRAPHY;
D O I：
10.1016/j.mechmat.2015.06.007
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper the Budiansky approach is used in order to reproduce the void growth measured experimentally by 3D tomography in metals. It permits to avoid the non physical fitting of the alpha coefficient in Huang's law. This model considers the viscoplasticity of the material to account for the interaction between the voids. It is shown that strain rate sensitivity of the material is playing a key role on growth of cavity and thus on damage of materials. Moreover finite elements calculations are carried out to check the influence of geometrical parameters (fraction of porosity, distance between voids) on the damage behaviour. The results are in agreement with the Budiansky model. (C) 2015 Elsevier Ltd. All rights reserved.
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页码：169 / 175
页数：7
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