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Application of the Refined Zigzag Theory to the Modeling of Delaminations in Laminated CompositesThe Refined Zigzag Theory is applied to the modeling of delaminations in laminated composites. The commonly used cohesive zone approach is adapted for use within a continuum mechanics model, and then used to predict the onset and propagation of delamination in five cross-ply composite beams. The resin-rich area between individual composite plies is modeled explicitly using thin, discrete layers with isotropic material properties. A damage model is applied to these resin-rich layers to enable tracking of delamination propagation. The displacement jump across the damaged interfacial resin layer is captured using the zigzag function of the Refined Zigzag Theory. The overall model predicts the initiation of delamination to within 8% compared to experimental results and the load drop after propagation is represented accurately.
Document ID
20160000767
Acquisition Source
Langley Research Center
Document Type
Technical Memorandum (TM)
Authors
Groh, Rainer M. J.
(Bristol Univ. United Kingdom)
Weaver, Paul M.
(Bristol Univ. United Kingdom)
Tessler, Alexander
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
January 13, 2016
Publication Date
October 1, 2015
Subject Category
Structural Mechanics
Composite Materials
Report/Patent Number
L-20610
NASA/TM-2015-218808
NF1676L-22555
Funding Number(s)
WBS: WBS 826611.04.07.01
CONTRACT_GRANT: EP/G036772/1
Distribution Limits
Public
Copyright
Public Use Permitted.
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