Measurement of mixed mode (I,II) stress intensity factors (SIFs) of an interface crack by the optical method of caustics

Lyndon Edwards; H. Y. Ahmad

doi:10.1117/12.158596

27 September 1993 Measurement of mixed mode (I,II) stress intensity factors (SIFs) of an interface crack by the optical method of caustics

Lyndon Edwards, H. Y. Ahmad

Author Affiliations +

Proceedings Volume 1999, Adhesives Engineering; (1993) https://doi.org/10.1117/12.158596
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

The optical method of caustics has been utilized to study the problem of a crack lying along the interface of adhesively bonded aluminum structures. The basic principles of the method, the mathematical description and the derivation of caustic evaluation formulas are presented for homogeneous and dissimilar materials. Optically flat mirror surfaces were achieved by developing a 'coating adhesion' technique. Predicted caustics using the derived equations were compared with the caustics obtained experimentally which show good agreement.

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Lyndon Edwards and H. Y. Ahmad "Measurement of mixed mode (I,II) stress intensity factors (SIFs) of an interface crack by the optical method of caustics", Proc. SPIE 1999, Adhesives Engineering, (27 September 1993); https://doi.org/10.1117/12.158596

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