Abstract

A piecewise-linear parametric uniaxial tension and compression stress-strain model with a simplified post-peak response is developed to obtain the nonlinear load deflection response of epoxy resin materials which are considerably stronger in compression than tension. This model could be used to obtain flexural strength when the complete post-peak behavior of the material in tension and compression is not available. The tension and compression stress-strain curves are bilinear for pre-peak response followed by a constant flow stress in tension and a constant yield stress in compression in the post-peak response. The simulations and experiments reveal the suitability of this model for predicting the threepoint bending and four-point bending response. This model gives an upper bound estimate for flexural over-strength factor.

Original languageEnglish (US)
Pages (from-to)18-31
Number of pages14
JournalJournal of Strain Analysis for Engineering Design
Volume47
Issue number1
DOIs
StatePublished - Jan 1 2012

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Keywords

  • Curvature
  • Deflection
  • Epoxy resin
  • Fourpoint bending (4PB)
  • Load
  • Moment distribution
  • Nonlinear response
  • Stress-strain relations
  • Three-point bending (3PB)

ASJC Scopus subject areas

  • Modeling and Simulation
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

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