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http://dx.doi.org/10.5762/KAIS.2010.11.9.3148

Probabilistic Approach for Fatigue Life of Composite Materials with Impact-Induced Damage  

Kang, Ki-Weon (School of Mechanical and Automobile Engineering, Kunsan National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.11, no.9, 2010 , pp. 3148-3154 More about this Journal
Abstract
This paper presents the probabilistic analysis for fatigue life of Glass/Epoxy laminates with impact-induced damage. For this, a series of impact tests were perfomed on the Glass/Epoxy laminates using instrumented impact testing machine. Then, tensile and fatigue tests carried out so as to generate post-impact residual strength and fatigue life. Two Parameter Weibull distribution was used to fit the residual strength and fatigue life data of Glass/Epoxy composite laminates. The residual strength was affected by impact energy and their variance decreased with increasing of impact energy. The fatigue life of impacted laminates was greatly reduced by impact energy and this trend depended on applied stress amplitude. Additionally, the variation of fatigue life was gradually decreased with the applied stress amplitude.
Keywords
Composite materials; Impact damage; Residual strength; Probabilistic analysis;
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