Description
The flexural behavior of epoxies was investigated by performing mechanical tests and applying statistical Weibull theory and analytical methods to the results. The effects of loading systems and environmental conditions were also considered. Three kinds of epoxies were studied: Epon

The flexural behavior of epoxies was investigated by performing mechanical tests and applying statistical Weibull theory and analytical methods to the results. The effects of loading systems and environmental conditions were also considered. Three kinds of epoxies were studied: Epon E863, PRI 2002, and PR520. In total, 53 three-point-bending (3PB) Epon E863 samples and 26 3PB PR520 were tested immediately after curing, together with 26 four-point-bending (4PB) PRI2002 samples stored at 60°C and 90% Rh for 48 weeks. The Weibull parameters were estimated using both linear regression and the moments method. The statistical character of the Weibull model leads to uncertainty in the evaluated parameters, even for a large number of experiments. This study analyzed the ratio of flexural strength to tensile strength in bulk epoxy resin polymers. An analytical method previously developed by the authors to study the relationship between uniaxial tension/compression stress-strain curves and flexural load-deflection response was used to obtain the ratio. The results show that the Weibull model overpredicted the aforementioned ratio in different load arrangements.
Downloads
PDF (8.9 MB)

Details

Title
  • The ratio of flexural strength to uniaxial tensile strength in bulk epoxy resin polymeric materials
Date Created
2014-12-01
Resource Type
  • Text
  • Collections this item is in
    Identifier
    Note
    • NOTICE: this is the author's version of a work that was accepted for publication. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published at http://dx.doi.org/10.1016/j.polymertesting.2014.09.002.

    Citation and reuse

    Cite this item

    This is a suggested citation. Consult the appropriate style guide for specific citation guidelines.

    M. Yekani Fard, B. Raji, A. Chattopadhyay, The ratio of flexural strength to uniaxial tensile strength in bulk epoxy resin polymeric materials, Polymer Testing, Volume 40, December 2014, Pages 156-162, http://dx.doi.org/10.1016/j.polymertesting.2014.09.002.

    Machine-readable links