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Proceedings Paper

Influence of the orthotropy of the ductile materials and the stress-assisted diffusion on the caustics
Author(s): George A. Papadopoulos
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Paper 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.

Paper Details

Date Published: 1 December 1991
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Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); doi: 10.1117/12.49533
Show Author Affiliations
George A. Papadopoulos, National Technical Univ. of Athens (Greece)


Published in SPIE Proceedings Vol. 1554:
Second International Conference on Photomechanics and Speckle Metrology
Fu-Pen Chiang; Fu-Pen Chiang, Editor(s)

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