Experimental Characterization of the Elastic-Plastic Strain Fields at the Crack Tip Due to Cyclic Loading

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...

Full description

Saved in:
Bibliographic Details
Published in:Journal of engineering materials and technology 1994-04, Vol.116 (2), p.187-192
Main Authors: Ranganathan, N, Jendoubi, K, Merah, N
Format: Article
Language:English
Subjects:
360103 - Metals & Alloys- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
CRACKS
DATA
Exact sciences and technology
EXPERIMENTAL DATA
FAILURES
Fundamental areas of phenomenology (including applications)
INFORMATION
LIFETIME
MATERIALS SCIENCE
MATERIALS TESTING
Measurement and testing methods
Measurement methods and techniques in continuum mechanics of solids
MEASURING INSTRUMENTS
MECHANICAL PROPERTIES
MECHANICAL TESTS
NUMERICAL DATA
Physics
PLASTICITY
SERVICE LIFE
Solid mechanics
STRAIN GAGES
STRAINS
Structural and continuum mechanics
TESTING
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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).
ISSN:0094-4289
1528-8889
DOI:10.1115/1.2904271