Abstract

It has been shown that the direct use of tension and compression stress strain models underestimates the flexural strength of epoxy resin materials. The value of the flexural over-strength factor which is the ratio of the flexural strength to the strength obtained from tension and compression stress strain models depends on stress gradient, size and loading system. Fifty-two small-sized three point bending samples of epoxy resin Epon E863 and eight small-sized three point bending PR520 were tested at room temperature. All the samples had a groove in the middle of the beam. The Method of Moments and the Least Square Analysis Method were used to determine the Weibull parameters. Different common estimators for probability of fracture were used to estimate the flexural over-strength factor. The two-parameter Weibull model overestimates the flexural over-strength factor for epoxy resin materials.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
StatePublished - 2013
Event54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Boston, MA, United States
Duration: Apr 8 2013Apr 11 2013

Other

Other54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
CountryUnited States
CityBoston, MA
Period4/8/134/11/13

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ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Science(all)
  • Aerospace Engineering
  • Architecture

Cite this

Yekani Fard, M., & Chattopadhyay, A. (2013). Flexural over-strength factor for epoxy resin materials. In Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference [AIAA 2013-1906]