Characterization and modeling of polymeric matrix under static and dynamic loading

Brian T. Werner, Isaac M. Daniel*

*Corresponding author for this work

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

Abstract

A polymeric matrix (3501-6) used in composite materials was characterized under multi-axial loading at strain rates varying from quasi-static to dynamic ones. Tests were conducted under uniaxial compression, tension, pure shear and combinations of compression and shear. Quasi-static and intermediate strain rate tests were conducted in a servo-hydraulic testing machine. High strain rate tests were conducted using a split Hopkinson Pressure Bar (Kolsky bar) system built for the purpose. This SHPB system was made of a glass/epoxy composite (Garolite) bars having an impedance that is closer to that of the test polymer than metals. The typical stress-strain behavior of the polymeric matrix exhibits a linear elastic region up to a yield point, a nonlinear elastoplastic region up to an initial peak or "critical stress," followed by a strain softening region up to a local minimum and finally, a strain hardening region up to ultimate failure. A general three-dimensional elasto-viscoplastic model was developed incorporating strain rate effects, and including the large deformation region. The model was formulated in strain space unlike most models in the literature. The stress-strain curves obtained were used to develop and validate the new elasto-viscoplastic constitutive model.

Original languageEnglish (US)
Title of host publicationDynamic Behavior of Materials - Proceedings of the 2012 Annual Conference on Experimental and Applied Mechanics
Pages73-84
Number of pages12
DOIs
StatePublished - Jan 1 2013
Event2012 Annual Conference on Experimental and Applied Mechanics - Costa Mesa, CA, United States
Duration: Jun 11 2012Jun 14 2012

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
Volume1
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Other

Other2012 Annual Conference on Experimental and Applied Mechanics
CountryUnited States
CityCosta Mesa, CA
Period6/11/126/14/12

Keywords

  • Constituive modeling
  • Dynamic testing
  • Elasto-plastic behavior
  • Multi-axial testing
  • Polymer characterization
  • Strain rate effects

ASJC Scopus subject areas

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

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