Experimental characterization of the elastic-plastic strain fields at the crack tip due to cyclic loading

Journal Article · Thu Mar 31 23:00:00 EST 1994 · Journal of Engineering Materials and Technology; (United States)

DOI:https://doi.org/10.1115/1.2904271· OSTI ID:7104850

Ranganathan, N ^[1]; Jendoubi, K; Merah, N ^[2]

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1. Ecole Nationale Superieure de Mecanique et d'Aerotechnique, Poitiers (France). Dept. of Materials Science and Mechanical Engineering
2. Ecole Polytechnique, Montreal, Quebec (Canada). Dept. of Mechanical Engineering

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 [Delta]K. 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 [Delta]K. The experimental results are compared with those given by numerical and theoretical analyses based on the concepts of linear elastic fracture mechanics (LEFM).

• OSTI ID: 7104850
• Journal Information: Journal of Engineering Materials and Technology; (United States), Journal Name: Journal of Engineering Materials and Technology; (United States) Vol. 116:2; ISSN 0094-4289; ISSN JEMTA8
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
CRACKS
DATA
EXPERIMENTAL DATA
FAILURES
INFORMATION
LIFETIME
MATERIALS TESTING
MEASURING INSTRUMENTS
MECHANICAL PROPERTIES
MECHANICAL TESTS
NUMERICAL DATA
PLASTICITY
SERVICE LIFE
STRAIN GAGES
STRAINS
TESTING