A model for predicting damage dependent response of inelastic media with microstructure

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This paper presents a model developed for predicting the mechanical response of inelastic media with heterogeneous microstructure. Particular emphasis is given to the development of microstructural damage along grains. The model is developed within the concepts of continuum mechanics, with special emphasis on the development of internal boundaries in the continuum by utilizing fracture mechanics-based cohesive zone models. In addition, the grains are assumed to be characterized by nonlinear viscoplastic material behavior. Implementation of the model to a finite element computational algorithm is also briefly described, and example solutions are obtained. Finally, homogenization procedures are discussed for obtaining macroscopic damage ... continued below

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24 p.

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Allen, D.H.; DeVries, K.L. & Hurtado, L.D. December 1, 1997.

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  • Allen, D.H. Texas A and M Univ., College Station, TX (United States). Aerospace Engineering Dept.
  • DeVries, K.L. RE/SPEC, Inc., Rapid City, SD (United States)
  • Hurtado, L.D. Sandia National Labs., Albuquerque, NM (United States)

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

This paper presents a model developed for predicting the mechanical response of inelastic media with heterogeneous microstructure. Particular emphasis is given to the development of microstructural damage along grains. The model is developed within the concepts of continuum mechanics, with special emphasis on the development of internal boundaries in the continuum by utilizing fracture mechanics-based cohesive zone models. In addition, the grains are assumed to be characterized by nonlinear viscoplastic material behavior. Implementation of the model to a finite element computational algorithm is also briefly described, and example solutions are obtained. Finally, homogenization procedures are discussed for obtaining macroscopic damage dependent mechanical constitutive equations that may then be utilized to construct a well-posed boundary value problem for the macroscopically homogenized damage dependent medium.

Physical Description

24 p.

Notes

OSTI as DE98001367

Source

  • 35. annual technical meeting of the Society of Engineering Science, Pullman, WA (United States), 27-30 Sep 1998

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  • Other: DE98001367
  • Report No.: SAND--97-2707C
  • Report No.: CONF-980902--
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 658119
  • Archival Resource Key: ark:/67531/metadc710915

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • December 1, 1997

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • June 14, 2016, 6:01 p.m.

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Allen, D.H.; DeVries, K.L. & Hurtado, L.D. A model for predicting damage dependent response of inelastic media with microstructure, article, December 1, 1997; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc710915/: accessed January 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.