Multiscale stochastic analysis of FRP based on variability in fiber volume fraction, epoxy stiffness and strength

Seyed Hamid Reza Sanei, Eric M. Jensen, Ray S. Fertig

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

3 Scopus citations

Abstract

For accurate prediction of composite failure, microstructural variability must be considered. The distribution of epoxy stiffness and hardness were determined by nanoindentation and used in stochastic finite element modeling. Another key microstructural feature, fiber volume fraction variability, was determined by image processing of an SEM image. Stochastic failure analysis was implemented on a hexagonal fiber packing micromechanics model to predict the initiation of failure under multiaxial loadings. Three failure criteria were employed for characterization of failure: maximum stress, von Mises, and Christensen. Failure envelopes were developed for three different reliability levels. The results revealed that the variability in epoxy strength influence the failure behavior significantly, whereas, stiffness variability has minimal effect.

Original languageEnglish (US)
Title of host publication56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Electronic)9781624103421
StatePublished - Jan 1 2015
Event56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 2015 - Kissimmee, United States
Duration: Jan 5 2015Jan 9 2015

Other

Other56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 2015
CountryUnited States
CityKissimmee
Period1/5/151/9/15

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Architecture
  • Mechanics of Materials
  • Building and Construction

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