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http://dx.doi.org/10.5139/JKSAS.2013.41.1.17

Micro-mechanical Failure Prediction and Verification for Fiber Reinforced Composite Materials by Multi-scale Modeling Method  

Kim, Myung-Jun (Graduate School, Korea Aerospace Univ.)
Park, Sung-Ho (Graduate School, Seoul National Univ.)
Park, Jung-Sun (Aerospace and Mechanical Engineering Department, Korea Aerospace Univ.)
Lee, Woo-Il (School of Mechanical and Aerospace Engineering, Seoul National Univ.)
Kim, Min-Sung (Agency for Defense Development)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.41, no.1, 2013 , pp. 17-24 More about this Journal
Abstract
In this paper, a micro-mechanical failure prediction program is developed based on SIFT (Strain Invariant Failure Theory) by using the multi-scale modeling method for fiber-reinforced composite materials. And the failure analysis are performed for open-hole composite laminate specimen in order to verify the developed program. First of all, the critical strain invariants are obtained through the tensile tests for three types of specimens. Also, the matrices of strain amplification factors are determined through the finite element analysis for micro-mechanical model, RVE (Representative Volume Element). Finally, the microscopic failure analysis is performed for the open-hole composite laminate specimen model by applying a failure load obtained from tensile test, and the predicted failure indices are evaluated for verification of the developed program.
Keywords
Strain invariant; Strain amplification factor; Volumetric strain; Equivalent Strain;
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