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Title
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Elastic Crack Analysis by a Finite Element Hybrid Method
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Description
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The paper presents an efficient finite element method for evaluating the elastic stress intensity factors at the tip of a sharp crack. The method is based on a hybrid stress model for which special stress terms which represent the correct singularity behavior at the crack tip can be included. The magnitudes of such singular terms which are among the unknowns of the final matrix equations are, in fact, the stress intensity factors to be evaluated. Example solutions include plane stress cracks of both the opening type (Mode I) and in-plane shear type (Mode II) for isotropic materials and· of the opening type for anisotropic materials.
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Creator
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Pian, T. H. H.
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Tong, P.
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Luk, C. H.
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Abstract
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The paper presents an efficient finite element method for evaluating the elastic stress intensity factors at the tip of a sharp crack. The method is based on a hybrid stress model for which special stress terms which represent the correct singularity behavior at the crack tip can be included. The magnitudes of such singular terms which are among the unknowns of the final matrix equations are, in fact, the stress intensity factors to be evaluated. Example solutions include plane stress cracks of both the opening type (Mode I) and in-plane shear type (Mode II) for isotropic materials and· of the opening type for anisotropic materials.
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Corporate Author
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Massachusetts Institute of Technology
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Report Number
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AFFDL TR 71-160 p. 661-682
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Publisher
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Wright-Patterson Air Force Base, OH : Air Force Flight Dynamics Laboratory, Air Force Systems Command and Air Force Institute of Technology, Air University
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Date
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1973
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Type
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article
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Date Issued
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1973-12
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Provenance
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Bombardier/Aero
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Report Availability
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Full text available
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Distribution Classification
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1
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Distribution Conflict
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No
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DTIC Record Exists
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No
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Format
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1 online resource (23 pages) : ill.
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Extent
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23
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Identifier
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AD0785968
