Evaluation of damage accumulation zone in the vicinity of the crack tip: FEM analysis via UMAT procedure

Nowadays the damage and failure of the material are of critical interest to designers of engineering structures, especially in aircraft and spacecraft industry. As there is a lack of methods for accurate failure prediction and damage analysis. Especially for early stages of the design process, a qui...

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Bibliographic Details
Published in:Journal of physics. Conference series 2018-12, Vol.1096 (1), p.12157
Main Authors: Turkova, V A, Stepanova, L V
Format: Article
Language:English
Subjects:
Continuum damage mechanics
Crack tips
Damage accumulation
Damage assessment
Failure analysis
Finite element method
Mathematical models
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Summary:Nowadays the damage and failure of the material are of critical interest to designers of engineering structures, especially in aircraft and spacecraft industry. As there is a lack of methods for accurate failure prediction and damage analysis. Especially for early stages of the design process, a quick way of estimating material behavior is needed. There is a need for a material model coupled with a damage evolution law. In the paper a damage model, based on continuum damage mechanics, is presented. The material law is implemented computationally as a user defined subroutine (UMAT) in a commercially available FEM package Simulia Abaqus. The active damage accumulation zones in the vicinity of the crack tip for a wide class of cracked specimens are analyzed. Distribution of each damage component is given.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1096/1/012157