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Dynamic penny-shaped crack in a transversely isotropic material

โœ Scribed by Y.M. Tsai

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
563 KB
Volume
31
Category
Article
ISSN
0013-7944

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โœฆ Synopsis

The scattering of a harmonic longitudinal wave by a penny-shaped crack in a transversely isotropic material is investigated using the techniques of Hankel transform. The wave impinges normally on the crack surfaces. A complete contour integration is employed to simplify the expressions of the results. An exact expression of the dynamic stress-intensity factor is obtained as a function of the frequency factor and the anisotropic material constants. The normalized dynamic stress-intensity factor is shown to have different maximum values at different wave frequencies for the sample composite and metallic materials. The distortion of the dynamic crack shape and the displacement at the crack center are also shown to be dependent of the wave frequency and the anisotropy of the material.

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