Some elastodynamic problems of cracks

✍ Scribed by G. C. Sih

• Publisher: Springer Netherlands
• Year: 1968
• Tongue: English
• Weight: 853 KB
• Volume: 4
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00189147

✦ Synopsis

Elastodynamie problems of both stationary and moving cracks are discussed. Previous work on the dynamics of fracture has been limited mostly to the model of a semi-infinite crack. In this paper, special emphasis is placed on the configuration of a crack having finite length. By retaining the additional characteristic dimension in the dynamic problem, namely tlae crack length, several typical features of the dynamical stress solution can be ex. hibited. These are the peak values of the crack-tip stress intensity factors occurring at certain wave length for cracks opened by periodic cyclic loadings, and at a given time for cracks opened by rapidly applied tractions. A general solution to the problem of cracks travelling at constant speed is also given, It is shown that the extension of Dugdale's plasticity model to the case of a moving eraek is straightforward.