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Crack propagation at material interfaces: I. Experimental technique to determine crack profiles

Instrumentation is developed to measure crack-opening displacements at the front of interfacial cracks with micrometer resolution while adherend displacement history is prescribed to the same accuracy

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Abstract

The analysis of the strength of adhesively bonded joints depends to a large degree on concepts of linear fracture mechanics. This discipline rests on appropriate fracture criteria and their evaluation in terms of the linearized theory of (visco) elasticity. We document here the technique and the instrumentation that allows close experimental scrutiny of the linearity assumption as well as an exploration of criteria for interfacial unbonding.

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Authors and Affiliations

  1. General Dynamics, Fort Worth, 76101, TX

    K. M. Liechti (Research Scientist)

  2. Graduate Aeronautical Laboratory, California Institute of Technology, 91125, Pasadena, CA

    W. G. Knauss (Professor)

Authors
  1. K. M. Liechti
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  2. W. G. Knauss
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Liechti, K.M., Knauss, W.G. Crack propagation at material interfaces: I. Experimental technique to determine crack profiles. Experimental Mechanics 22, 262–269 (1982). https://doi.org/10.1007/BF02326391

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  • DOI: https://doi.org/10.1007/BF02326391

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