Three dimensional fracture mechanics computations using tetrahedral finite elements
Author(s)
Rajaram, Harish, 1976-![Thumbnail](/bitstream/handle/1721.1/28214/43320058-MIT.pdf.jpg?sequence=5&isAllowed=y)
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Alternative title
3D fracture mechanics computations using tetrahedral finite elements
Advisor
David M. Parks.
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Show full item recordAbstract
With the development of CAD packages which can create complicated 3-D models and mesh them with tetrahedral elements with relative ease, the application of finite element techniques in mechanical design has reached unprecedented proportions. However, the extension of these techniques to fracture mechanics studies is hindered by the unavailability of a general method to obtain fracture mechanics singularity strength (J, K1, etc.) for tetrahedral meshes. An approach to obtain these parameters along a 3-D crack front using tetrahedral elements is presented here. The method is then validated on well-known crack geometries using tetrahedral meshes generated from commercially-available CAD-FEA packages or both elastic and elastic-plastic problems.
Description
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999. Includes bibliographical references (leaves 130-133).
Date issued
1999Department
Massachusetts Institute of Technology. Department of Mechanical EngineeringPublisher
Massachusetts Institute of Technology
Keywords
Mechanical Engineering