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Stochastic damage evolution in textile laminatesA probabilistic model utilizing random material characteristics to predict damage evolution in textile laminates is presented. Model is based on a division of each ply into two sublaminas consisting of cells. The probability of cell failure is calculated using stochastic function theory and maximal strain failure criterion. Three modes of failure, i.e. fiber breakage, matrix failure in transverse direction, as well as matrix or interface shear cracking, are taken into account. Computed failure probabilities are utilized in reducing cell stiffness based on the mesovolume concept. A numerical algorithm is developed predicting the damage evolution and deformation history of textile laminates. Effect of scatter of fiber orientation on cell properties is discussed. Weave influence on damage accumulation is illustrated with the help of an example of a Kevlar/epoxy laminate.
Document ID
19940012388
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Dzenis, Yuris A. (Texas Univ. Arlington, TX, United States)
Bogdanovich, Alexander E. (North Carolina State Univ. Raleigh., United States)
Pastore, Christopher M. (North Carolina State Univ. Raleigh., United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1993
Publication Information
Publication: NASA. Langley Research Center, FIBER-TEX 1992: The Sixth Conference on Advanced Engineering Fibers and Textile Structures for Composites
Subject Category
Composite Materials
Accession Number
94N16861
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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