Interaction of delaminations and matrix cracks in a CFRP plate, Part II: Simulation using an enriched shell finite element model

Numerical simulations are presented of a recently developed test which creates multiple delaminations in a CFRP laminate specimen that grow and interact via transverse matrix cracks [1]. A novel shell element enriched with the Floating Node Method, and a damage algorithm based on the Virtual Crack C...

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Bibliographic Details
Published inComposites. Part A, Applied science and manufacturing Vol. 103; pp. 252 - 262
Main Authors McElroy, Mark W., Gutkin, Renaud, Pankow, Mark
Format Journal Article
LanguageEnglish
Published Langley Research Center Elsevier Ltd 01.12.2017
Elsevier
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Summary:Numerical simulations are presented of a recently developed test which creates multiple delaminations in a CFRP laminate specimen that grow and interact via transverse matrix cracks [1]. A novel shell element enriched with the Floating Node Method, and a damage algorithm based on the Virtual Crack Closure Technique, were used to successfully simulate the tests. Additionally, a 3D high mesh fidelity model based on cohesive zones and continuum damage mechanics was used to simulate the tests and act as a representative of other similar state-of-the-art high mesh fidelity modeling techniques to compare to the enriched shell element. The enriched shell and high mesh fidelity models had similar levels of accuracy and generally matched the experimental data. With runtimes of 36 min for the shell model and 55 h for the high mesh fidelity model, the shell model is 92 times faster than the high-fidelity simulation.
Bibliography:Langley Research Center
NF1676L-26156
LaRC
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1359-835X
1878-5840
DOI:10.1016/j.compositesa.2017.10.006