Influence of the orthotropy of the ductile materials and the stress-assisted diffusion on the caustics

George A. Papadopoulos

doi:10.1117/12.49533

1 December 1991 Influence of the orthotropy of the ductile materials and the stress-assisted diffusion on the caustics

George A. Papadopoulos

Proceedings Volume 1554, Second International Conference on Photomechanics and Speckle Metrology; (1991) https://doi.org/10.1117/12.49533
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

The optical method of reflected caustics was applied up-to-now to various elastic problems containing singularities and especially to problems with cracked plates from isotropic materials. In this paper the influence of the stress-assisted diffusion is studied. Around the crack tip a core-region is developed by the stress-assisted diffusion. This core-region is a strongly brittle area which depends on the sum of the principal stresses at the crack tip and on phenomenological coefficients. So, this core-region influences the initial curve of the caustic and consiquently the shape and size of the caustic. Also, the effect of line - plastic zones developed ahead of crack tip in orthotropic plates on the shape and size of reflected caustics is discussed.

Citation Download Citation

George A. Papadopoulos "Influence of the orthotropy of the ductile materials and the stress-assisted diffusion on the caustics", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.49533

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