The stability of a wedge crack under a uniform applied stress

✍ Scribed by E. Smith

• Publisher: Springer Netherlands
• Year: 1965
• Tongue: English
• Weight: 349 KB
• Volume: 1
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00186855

✦ Synopsis

The usual approach in finding the conditions for crack extensiol) is to determine the stationary values of the total energy of the system with respect to crack length; this necessitates the calculation of all the terms which combine to form the total energy. However, a very simple alternative approach is described; this allows the crack extension condition to be expressed in terms of the local dislocation distribution functions which represent the displacement of the crack surface near a tip. Such functions can quite often be obtained in simple form, and the method is used to discuss the stability of a wedge shaped crack subject to a general uniform applied stress system. It is shown how microcrack models, discussed by other workers, can be treated as special cases.