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Adaptive hierarchical enrichment for delamination fracture using a decohesive zone model
Author(s) -
Crisfield M. A.,
Alfano G.
Publication year - 2002
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.469
Subject(s) - softening , deflection (physics) , structural engineering , iterative and incremental development , delamination (geology) , boundary value problem , computer science , materials science , algorithm , mathematics , geology , composite material , engineering , mathematical analysis , physics , paleontology , tectonics , subduction , software engineering , optics
Abstract The paper describes a method for modelling delamination in fibre‐reinforced composite structures with the aid of a decohesive zone model and interface elements. Unless a fine mesh is provided, the resulting load/deflection responses are very non‐smooth and the iterative non‐linear solution procedure may fail. To overcome this problem, the elements around the softening process zone are enriched with hierarchical polynomial functions. The enriched zones change as the analysis proceeds and the cracks propagate. This procedure is implemented using a technique which continually modifies the boundary conditions. Copyright © 2002 John Wiley & Sons, Ltd.