Some mechanical components cease to function satisfactorily, failing either under excessive elastic deformation or extensive plastic yielding. In the case of constrained plastification, the researcher is faced with some difficulties in evaluating plastic and elastic-plastic strain behavior near the crack tip. In the present study local strains are measured by microstrain gages, mounted near the crack tip on CT specimens made from the high strength aluminum alloy 2024-T351 under cyclic loading at constant ΔK. The behavior and the evolution of the elastic-plastic zone are studied as a function of the stress ratio R, the thickness of the specimen and the level of ΔK. The experimental results are compared with those given by numerical and theoretical analyses based on the concepts of linear elastic fracture mechanics (LEFM).
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April 1994
Research Papers
Experimental Characterization of the Elastic-Plastic Strain Fields at the Crack Tip Due to Cyclic Loading
N. Ranganathan,
N. Ranganathan
Department of Materials Science and Mechanical Engineering, E´cole Nationale Supe´rieure de Me´canique et d’Ae´rotechnique, 86034 Poitiers, France
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K. Jendoubi,
K. Jendoubi
Department of Mechanical Engineering, E´cole Polytechnique, Montre´al, Que´bec, H3C 3A7, Canada
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N. Merah
N. Merah
Department of Mechanical Engineering, E´cole Polytechnique, Montre´al, Que´bec, H3C 3A7, Canada
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N. Ranganathan
Department of Materials Science and Mechanical Engineering, E´cole Nationale Supe´rieure de Me´canique et d’Ae´rotechnique, 86034 Poitiers, France
K. Jendoubi
Department of Mechanical Engineering, E´cole Polytechnique, Montre´al, Que´bec, H3C 3A7, Canada
N. Merah
Department of Mechanical Engineering, E´cole Polytechnique, Montre´al, Que´bec, H3C 3A7, Canada
J. Eng. Mater. Technol. Apr 1994, 116(2): 187-192 (6 pages)
Published Online: April 1, 1994
Article history
Received:
May 30, 1991
Revised:
December 28, 1992
Online:
April 29, 2008
Citation
Ranganathan, N., Jendoubi, K., and Merah, N. (April 1, 1994). "Experimental Characterization of the Elastic-Plastic Strain Fields at the Crack Tip Due to Cyclic Loading." ASME. J. Eng. Mater. Technol. April 1994; 116(2): 187–192. https://doi.org/10.1115/1.2904271
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