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Finite Element Model for Failure Study of Two-Dimensional Triaxially Braided CompositeA new three-dimensional finite element model of two-dimensional triaxially braided composites is presented in this paper. This meso-scale modeling technique is used to examine and predict the deformation and damage observed in tests of straight sided specimens. A unit cell based approach is used to take into account the braiding architecture as well as the mechanical properties of the fiber tows, the matrix and the fiber tow-matrix interface. A 0 deg / plus or minus 60 deg. braiding configuration has been investigated by conducting static finite element analyses. Failure initiation and progressive degradation has been simulated in the fiber tows by use of the Hashin failure criteria and a damage evolution law. The fiber tow-matrix interface was modeled by using a cohesive zone approach to capture any fiber-matrix debonding. By comparing the analytical results to those obtained experimentally, the applicability of the developed model was assessed and the failure process was investigated.
Document ID
20100026659
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Li, Xuetao (Akron Univ. Akron, OH, United States)
Binienda, Wieslaw K. (Akron Univ. Akron, OH, United States)
Goldberg, Robert K. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 24, 2013
Publication Date
July 1, 2010
Subject Category
Composite Materials
Report/Patent Number
E-17308
NASA/TM-2010-216372
Funding Number(s)
WBS: WBS 698259.02.07.03.03.01
CONTRACT_GRANT: NNX07AV60A
Distribution Limits
Public
Copyright
Public Use Permitted.

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