Finite-Element Analysis of Some Full- and PartialRing CrackPropagation Test Specimens

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Report Number: AFWAL TR 82-4015
Author(s): Ashbaugh, Noel E., Ahmad, Jalees
Corporate Author(s): Systems Research Laboratories, Inc.
Date of Publication: 1982-03-01
Pages: 51
DoD Task:
Identifier: ADA117674

Ring-shaped specimens containing cracks are analyzed by a finite-element method. Results are obtained for the stress-intensity factor and the deformation or compliance of the specimen at locations which are convenient for experimental measurement. The specimens which are analyzed are the full-ring geometries under tensile and compressive loads having a single or double crack emanating from the inner radius, with the crack plane perpendicular to the load line for tensile loads and coinciding with the load line for compressive loads. A modified C-specimen and half rings under tensile loads having a single crack are analyzed. Results are obtained for various crack lengths and aspect ratios (inner radius divided by outer radius) equal to 0.5, 0.333, and 0.25. The results for the modified C-specimen are determined only for an aspect ratio of 0.5. Functional expressions are given for the stress-intensity factor and the compliance for the single-crack ring tension specimen and the modified C-specimen.

Provenance: IIT

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