Effect of material variability on progressive damage and micromechanics of composite materials

Joel Johnston, Cristopher Heitland, Aditi Chattopadhyay

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

Abstract

The effects of material variability on the mechanical response, damage, and failure of polymer matrix composites are investigated in this paper. A previously developed strain rate dependent, sectional micromechanics model is extended to account for the variability in microstructure and constituent material properties. The model presented in this paper also includes a three-dimensional damage law based on a work potential theory and a microscale failure criterion. Microstructural characterization of the composite is performed to understand the spatial variability. Additionally, the Bayesian information criterion is used to obtain the best fit statistical distributions which are needed for the stochastic methodologies. A Latin hypercube sampling technique is used to link the microstructural, statistical distributions to the sectional micromechanics. The results obtained show that the novel stochastic sectional model is more accurate than the deterministic sectional model.

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 (Print)9781624103421
StatePublished - 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

ASJC Scopus subject areas

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

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  • Cite this

    Johnston, J., Heitland, C., & Chattopadhyay, A. (2015). Effect of material variability on progressive damage and micromechanics of composite materials. In 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference American Institute of Aeronautics and Astronautics Inc..