Dynamic analysis of wedge-assisted surface crack growth in tension

✍ Scribed by Y. C. Deng; L. M. Brock; J. C. Thompson

• Book ID: 104620684
• Publisher: Springer Netherlands
• Year: 1986
• Tongue: English
• Weight: 599 KB
• Volume: 16
• Category: Article
• ISSN: 0374-3535
• DOI: 10.1007/bf00043582

✦ Synopsis

The dynamic analysis of constant-speed tension crack growth in an elastic half-plane assisted by a rigid wedge traveling also at a constant speed is performed. By modeling the crack as an array of dislocations distributed w.r.t, speed, the analysis reduces to dual integral equations. These equations can, in turn, be replaced by one singular integral equation of the Cauchy type subject to constraint equations. A standard numerical solution approach then yields not only the solution but information on the crack growth in terms of various dimensionless input parameters.

In particular, it is found that the wedge speed uniquely determines the wedge half-plane/material separation point speed, while the crack speed depends on the wedge angle, half-plane tension and a dynamic stress intensity factor parameter. Moreover, these input quantities cannot be specified independently.