Extension of a plane crack in a pre-stressed infinite elastic medium

✍ Scribed by A.N. Das

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 609 KB
• Volume: 46
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(93)90161-k

✦ Synopsis

The problem of non-symmetric extension of an infinitesimal flaw into a plane crack due to two identical linearly varying plane SH-waves with parallel wave fronts in an infinite elastic medium which is initially in a state of uniform anti-plane shear has been considered. Fracture is assumed to initiate along the line where the wave fronts cross a finite time after crossing and the crack is assumed to extend non-symmetrically along the line of the wave intersection. The method of analysis is based on the observation that certain field quantities show dynamic similarity. The results include expressions for the stress intensity factors at the crack tips and the rate of energy flux into the crack edges. Numerical calculations are carried out to obtain stress intensity factors and the rate of energy flux into the crack tips for different values of the parameters.

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