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Alternative test method for interlaminar fracture toughness of composites

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Abstract

Two methods of determining the mode I interlaminar fracture toughness for fiber-reinforced polymer matrix (FRPM) composites using a double cantilever beam (DCB) test are compared. The standard method of determining G IC is based in linear-elastic fracture mechanics theory and requires a visual measurement of the crack length, presenting data acquisition and analysis difficulties. The proposed method makes use of elastic–plastic fracture mechanics theory and an analytical closed form solution to the J-integral to relate the fracture toughness J IC , load, and angular displacement at the load application points. This method has the advantage of replacing visually acquired data with data easily obtained using inexpensive transducers as well as being applicable to a broader class of materials.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Boise State University, 1910 University Drive, Boise, ID, 83725, USA

    Joshua D. Gunderson, John F. Brueck & Anthony J. Paris

Authors
  1. Joshua D. Gunderson
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  2. John F. Brueck
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  3. Anthony J. Paris
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Correspondence to Joshua D. Gunderson.

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Gunderson, J.D., Brueck, J.F. & Paris, A.J. Alternative test method for interlaminar fracture toughness of composites. Int J Fract 143, 273–276 (2007). https://doi.org/10.1007/s10704-007-9063-8

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  • DOI: https://doi.org/10.1007/s10704-007-9063-8

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