Stochastic failure analysis of an uncorrelated volume element using extended finite element method

S. H.R. Sanei, E. J. Barsotti, R. S. Fertig

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Variability present in composite microstructures was characterized using image analysis techniques. The quantified variability was incorporated in computersimulated microstructures. Microstructures were generated at a length scale associated with an uncorrelated volume element, which is a mesoscale for multiscale analysis. Nearest neighbor and radial distributions were used to evaluate the statistics of the generated microstructures. Fiber locations in the generated microstructures were rearranged to enforce statistical equivalence between all generated and actual microstructures. To predict mechanical properties, image-based finite element models were developed by importing fiber center locations and their corresponding radii. Extended finite element method (XFEM) was implemented in ABAQUS to model matrix cracking under transverse tension. Cohesive surfaces were defined at fibermatrix interface to model debonding between the two constituents. The failure initiation and the evolution path were predicted without assigning a preexisting crack. An ensemble of statistically equivalent microstructures was simulated to determine the variability in transverse strength. To evaluate the variability in strength under biaxial loading, stochastic failure envelopes were developed.

Original languageEnglish (US)
Title of host publicationProceedings of the American Society for Composites - 31st Technical Conference, ASC 2016
EditorsBarry D. Davidson, Michael W. Czabaj, James G. Ratcliffe
PublisherDEStech Publications Inc.
ISBN (Electronic)9781605953168
StatePublished - Jan 1 2016
Event31st Annual Technical Conference of the American Society for Composites, ASC 2016 - Williamsburg, United States
Duration: Sep 19 2016Sep 21 2016

Publication series

NameProceedings of the American Society for Composites - 31st Technical Conference, ASC 2016

Other

Other31st Annual Technical Conference of the American Society for Composites, ASC 2016
CountryUnited States
CityWilliamsburg
Period9/19/169/21/16

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

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    Sanei, S. H. R., Barsotti, E. J., & Fertig, R. S. (2016). Stochastic failure analysis of an uncorrelated volume element using extended finite element method. In B. D. Davidson, M. W. Czabaj, & J. G. Ratcliffe (Eds.), Proceedings of the American Society for Composites - 31st Technical Conference, ASC 2016 (Proceedings of the American Society for Composites - 31st Technical Conference, ASC 2016). DEStech Publications Inc..