A Simplified Method Study of Aluminium Alloy Fatigue Crack Tip Parameters Computed by Elastic-Plastic Finite Element Model

Xin Song; Jing Zhong Xiang; Jia Zhen Zhang

doi:10.4028/www.scientific.net/AMR.97-101.2748

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Cause Analysis of Longitudinal Cracks in Closure Segment of an Extra-Large Bridge
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A Simplified Method Study of Aluminium Alloy Fatigue Crack Tip Parameters Computed by Elastic-Plastic Finite Element Model
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The Experiment Research of Continual Extension of Surface Crack
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Effects of the Gear Tooth Modification on the Nonlinear Dynamics of Gear Transmission System
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Design and Manufacture of a New Large-Scale Three-Dimensional Geomechanics Model Test System
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 97-101A Simplified Method Study of Aluminium Alloy...

A Simplified Method Study of Aluminium Alloy Fatigue Crack Tip Parameters Computed by Elastic-Plastic Finite Element Model

Abstract:

Fatigue crack propagation of aluminium alloy 7049-OA has been studied by non-linear finite element business-oriented software ABAQUS, and elastic-plastic finite element models of static fatigue crack and dynamic fatigue crack of center crack panel (CCP) specimens are also built. Based on the finite element computation results, the differences of stress and crack opening displacement around crack tip of static crack model have been compared with those of dynamic crack model. The compared results showed that the finite element computation results of dynamic crack model can be replaced by the results calculated by the static crack model. Fatigue crack tip parameters of aluminium alloy CCP specimens can be calculated by elastic-plastic finite element model of static crack. This is an effective method to cut down the computation expense and promote the computational efficiency.