A LATIN-based model reduction approach for the simulation of cycling damage
The objective of this article is to introduce a new method including model order reduction for the life prediction of structures subjected to cycling damage. Contrary to classical incremental schemes for damage computation, a non-incremental technique, the LATIN method, is used herein as a solution framework. This approach allows to introduce a PGD model reduction technique which leads to a drastic reduction of the computational cost. The proposed framework is exemplified for structures subjected to cyclic loading, where damage is considered to be isotropic and micro-defect closure effects are taken into account. A difficulty herein for the use of the LATIN method comes from the state laws which can not be transformed into linear relations through an internal variable transformation. A specific treatment of this issue is introduced in this work.
KeywordsLATIN method Proper Generalised Decomposition Non-linear solid mechanics Damage Reduced order model
The authors are grateful to the German Research Foundation (DFG) for funding the research through International Research Training Group 1627.
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