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Buckling And Post Buckling Behavior For Unsymmetrical Laminates Part I: Curing Cycle

Buckling And Post Buckling Behavior For Unsymmetrical Laminates Part I: Curing Cycle

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Title: Buckling And Post Buckling Behavior For Unsymmetrical Laminates Part I: Curing Cycle
Author: Elruby, A. Y.
Ahmed, Tawsif
Nakhla, Sam
Identifier: CSME091
Abstract: This is the first of two companion papers that examine the elastic buckling and post-buckling behavior of thin unsymmetric cross-ply laminates. When cured in a flat mold these panels possess two cylindrical equilibrium configurations. From stability perspective this problem is identified as a bifurcation buckling problem. As explained in literature thermal mismatch between plies and existing geometric imperfections triggered this behavior. Therefore, and according to Koiter it is necessary to measure and account for these geometric imperfections to accurately predict the cured shapes. Since imperfection measurement is challenging and cannot be possible in the stage of design. This work applies a unified finite element methodology based on Koiter’s theory to predict the cured shapes. This methodology is consistently applied in commonly used finite element computer codes, ABAQUS, ANSYS and LS-DYNA, and their predictions are compared.
Subject: Computational Mechanics
Engineering Analysis & Design
Materials Technology
Bistable, unsymmetric
Cross-ply
Curing
Buckling
Post-buckling
Type: Article
Rights: The copyright for the paper content remains with the author.
URI: http://hdl.handle.net/10315/35257
http://dx.doi.org/10.25071/10315/35257
Published: CSME-SCGM
ISSN: 978-1-77355-023-7
Date: 2018-05

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