FRP composite compressive strength and its dependence upon interfacial bond strength, fiber misalignment, and matrix nonlinearity

G. Zhang, R. A. Latour

Research output: Contribution to conferencePaperpeer-review

2 Scopus citations

Abstract

The uniaxial compressive strength of fiber reinforced polymer (FRP) composite is a very complex issue which is still not fully understood. Although FRP composites characteristically possess excellent ultimate and fatigue strength when loaded in tension in the fiber direction, compressive properties are typically not as good. This behavior is due to the fact that while tensile properties are fiber dominated, compressive properties are dependent upon other factors such as matrix modulus and strength, fiber/matrix interfacial bond strength, and fiber misalignment. An analytical model of fiber microbuckling within a polymer matrix has been developed for the purpose of investigating the micromechanical relationships between compressive strength and fiber microbuckling deformation, fiber volume fraction, matrix nonlinearity, interfacial bond strength, and initial fiber curvature. The results from this study provide insight into the micromechanics governing uniaxial compressive behavior of FRP composite materials. Results indicate that when both normal and shear interfacial stresses are considered, extension mode microbuckling is actually never the favored low energy mode of microbuckling. Results also demonstrate that depending upon material properties, service environment, and processing (fiber misalignment), either the fiber, matrix, or fiber/matrix interface can be the material component initiating compressive failure.

Original languageEnglish
Pages519-528
Number of pages10
StatePublished - 1994
EventProceedings of the 8th Technical Conference of the American Society for Composites (ASC) - Cleveland, OH, USA
Duration: Oct 19 1993Oct 21 1993

Conference

ConferenceProceedings of the 8th Technical Conference of the American Society for Composites (ASC)
CityCleveland, OH, USA
Period10/19/9310/21/93

ASJC Scopus subject areas

  • Chemical Engineering (all)
  • Chemical Engineering (miscellaneous)
  • Building and Construction
  • Polymers and Plastics

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