Weight functions for interface cracks
โ Scribed by Leslie Banks-Sills
- Publisher
- Springer Netherlands
- Year
- 1993
- Tongue
- English
- Weight
- 263 KB
- Volume
- 60
- Category
- Article
- ISSN
- 1573-2673
No coin nor oath required. For personal study only.
โฆ Synopsis
Weight functions are developed for determining stress intensity factors of cracks along an interface between two linear, elastic materials. As a result of the interface, both mode I and II components will be present for all but very special loading cases. The weight functions are employed to produce exactly the known stress intensity factors of a crack along an interface loaded by tensile and shear point forces.
๐ SIMILAR VOLUMES
Mixed-mode stress intensity factors were computed for kink cracks in front of a pre-existing semi-infinite crack. It will be shown that the differences between the weight function considerations by Cotterell and Rice and highly precise results from literature are a consequence of higher-order terms
The method of determining approximative weight functions, well known for straight through surface cracks ("edge cracks"), is extended to internal straight through cracks. The procedure is outlined in detail for central cracks in endless strips of infinite and finite widths. For the finite width stri
An analysis of known analytical and numerical weight functions for cracks in mode I has revealed that they all have a similar singular term and that it is possible to approximate them with one universal expression with three unknown parameters. The unknown parameters can be determined directly from
## A closed-form wide-range weight function for center cracks in various finite bodies was presented based on a more accurate crack surface displacement representation. This weight function covers a large relative crack length a/w up to 0.85. High accuracy level was established through careful com