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Influence on fiber inclination and interfacial conditions on fracture in composite materials

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Abstract

Dynamic photoelasticity has been used to study the effect of the fiber-matrix interface and fiber orientation on dynamic crack growth in fiber composites. Two types of fiber-matrix interfaces are considered: well bonded and partly debonded. The fiber-matrix interface is characterized by conducting fiber pullout tests. Partly debonded fibers aligned with the loading direction, result in higher fiber debonded lengths, lower dynamic stress-intensity factorK ID and lower fracture surface roughness compared to well bonded fibers. Orientation of brittle fibers, with respect to the loading direction, impairs their ability to lowerK ID , while oriented ductile fibers produce no significant change inK ID . Misalignment of fibers from the loading direction reduces the fiber debonded length due to kinding of the fiber at the crack face.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Texas A&M University, 77843-3123, College Station, TX

    S. K. Khanna (Assistant Research Engineer)

  2. Department of Mechanical Engineering, University of Rhode Island, 02881, Kingston, RI

    A. Shukla (Professor)

Authors
  1. S. K. Khanna
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  2. A. Shukla
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Khanna, S.K., Shukla, A. Influence on fiber inclination and interfacial conditions on fracture in composite materials. Experimental Mechanics 34, 171–180 (1994). https://doi.org/10.1007/BF02325714

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  • DOI: https://doi.org/10.1007/BF02325714

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