Fracture parameters for the orthotropic bimaterial interface cracks
β Scribed by Hwu Chyanbin
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 581 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0013-7944
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β¦ Synopsis
In order to define a proper bimaterial stress intensity factor, a general solution for the collinear interface cracks between dissimilar anisotropic media is applied to the near tip of an interface crack. Through the operation of normalization, scaling, nondimensionalization and transformation, a comparable definition which can be reduced to the classical stress intensity factors for a crack tip in homogeneous media has been obtained. For special cases of orthotropic bimaterial interface cracks, the explicit solutions are derived in terms of engineering constants.
π SIMILAR VOLUMES
A&dract--The complex stress intensity factor, K = Kt + i&t, which is used to chara~terixe the near tip fields of a bimaterial interface crack may atso be written as K = &ti, aud it has been shown that K, is directly related to the strain energy rele8se rate. An e&ient means of obtaining this quantit
## Abstract Partition of unity enrichment techniques are developed for bimaterial interface cracks. A discontinuous function and the twoβdimensional nearβtip asymptotic displacement functions are added to the finite element approximation using the framework of partition of unity. This enables the d
Zero thickness crack tip interface elements for a crack normal to the interface between two materials are presented. The elements are shown to have the desired r\*-' (0 < I < 1) singularity in the stress field at the crack tip and are compatible with other singular elements. The stiffness matrices o
The stress intensity factors for bimaterial interface cracks are determined by the boundary element method employing the multi-region technique and the double-point concept. A formula relating the stress intensity factors to the crack surface displacement, which is applicable to both the homogeneous