The ratio of flexural strength to uniaxial tensile strength in bulk epoxy resin polymeric materials

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6 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Pages (from-to)156-162
Number of pages7
JournalPolymer Testing
Volume40
DOIs
StatePublished - 2014

Fingerprint

Epoxy Resins
Epoxy resins
Bending strength
Tensile strength
Polymers
Stress-strain curves
Method of moments
Linear regression
Curing
Experiments
EPON
Uncertainty

Keywords

  • Analytical simulation
  • Epoxy resin
  • Experimental mechanics
  • Flexural strength
  • Nonlinear behavior
  • Weibull model

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

Cite this

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title = "The ratio of flexural strength to uniaxial tensile strength in bulk epoxy resin polymeric materials",
abstract = "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.",
keywords = "Analytical simulation, Epoxy resin, Experimental mechanics, Flexural strength, Nonlinear behavior, Weibull model",
author = "{Yekani Fard}, Masoud and B. Raji and Aditi Chattopadhyay",
year = "2014",
doi = "10.1016/j.polymertesting.2014.09.002",
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pages = "156--162",
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issn = "0142-9418",
publisher = "Elsevier Limited",

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T1 - The ratio of flexural strength to uniaxial tensile strength in bulk epoxy resin polymeric materials

AU - Yekani Fard, Masoud

AU - Raji, B.

AU - Chattopadhyay, Aditi

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

KW - Analytical simulation

KW - Epoxy resin

KW - Experimental mechanics

KW - Flexural strength

KW - Nonlinear behavior

KW - Weibull model

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