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Application of the Refined Zigzag Theory to the Modeling of Delaminations in Laminated Composites
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Author and Affiliation:
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)
Abstract: The 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.
Publication Date: Oct 01, 2015
Document ID:
20160000767
(Acquired Jan 15, 2016)
Subject Category: STRUCTURAL MECHANICS; COMPOSITE MATERIALS
Report/Patent Number: NASA/TM-2015-218808, L-20610, NF1676L-22555
Document Type: Technical Report
Contract/Grant/Task Num: EP/G036772/1; WBS 826611.04.07.01
Financial Sponsor: NASA Langley Research Center; Hampton, VA, United States
Description: 22p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: BEAMS (SUPPORTS); COMPOSITE MATERIALS; RESINS; LAMINATES; DELAMINATING; LOADS (FORCES); FAILURE MODES; CRACK PROPAGATION; DISPLACEMENT; DAMAGE ASSESSMENT; FATIGUE (MATERIALS); STRUCTURAL FAILURE; FAILURE ANALYSIS
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