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Application of MCT Failure Criterion using EFM
Final rept. 2 Dec 2008-2 Dec 2010
ASIAN OFFICE OF AEROSPACE RESEARCH AND DEVELOPMENT APO AP 96337-0007
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This document describes the work done in National University of Singapore to implement the Multi-Continuum Theory MCT of composite failure for damage progression analysis using the Element-Failure Method EFM in ABAQUS. The EFM-MCT has been implemented in ABAQUS using a user defined element subroutine EFM. Comparisons have been made between the analysis results using EFM-MCT code and HELIUSMCT code which uses material property degradation method MPDM. It is found that the conventional EFM-MCT code is less efficient than the HELIUSMCT code. This is due to the iterative nature of the EFM code in finding the solution. A non-iterative element-failure method N-EFM is then developed to improve the computational efficiency. This N-EFM-MCT has been implemented in an in-house code and comparison of computational efficiency has been made between N-EFM and MPDM.
APPROVED FOR PUBLIC RELEASE