Using hybrid element method to solve 3D elliptic crack problems with multi-materials structure
✍ Scribed by D. Peng; R. Jones; S. Pitt
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 592 KB
- Volume
- 9
- Category
- Article
- ISSN
- 1350-6307
No coin nor oath required. For personal study only.
✦ Synopsis
This paper presents a new hybrid element method, based on the finite element alternating technique (FEAT), for calculating the elastic stress-intensity factors for 3D structural components with complex loads, geometry and multiplematerials. It focuses attention on the problem of elliptic cracks. To this end a hybrid element formulation has been developed where the hybrid element has its stiffness matrix corrected to reflect exactly the existence of the true 3D crack geometry within the element. To obtain the stiffness matrix of the hybrid element, this approach involves the combined use of the redundant force method together with the displacement field results arising from the finite element alternating technique. This matrix was subsequently used together with a standard commercial finite element package to obtain the force field of the nodes. Finally these forces were used to determine the stress-intensity factors along the crack front.