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Simulation of Buckling‐Induced Failure in Composite Laminates
Author(s) -
Balzani Claudio,
Wagner Werner
Publication year - 2008
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200810259
Subject(s) - buckling , delamination (geology) , composite laminates , finite element method , structural engineering , composite number , stiffness , materials science , shear (geology) , shell (structure) , node (physics) , composite material , engineering , geology , paleontology , subduction , tectonics
This contribution presents a simple model for the analysis of buckling–induced failure in thin–walled composite laminates in the framework of the finite element method. The plies are modeled with shear deformable geometrically non–linear four–node shell elements which are layered according to the classical laminate theory. Shear locking effects are reduced via the well–known assumed natural strains (ANS) approach. A ply discount model is applied for the successive failure of the plies. The cohesive zone approach which is implemented in so–called interface elements is employed for delamination. The failure processes are history dependent leading to non–recurring stiffness degradation in areas where damage is detected. A numerical example with experimental evidence highlights the performance and applicability of the proposed model. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)