An Evaluation of Microgridding Techniques for Determining Local Plastic Strain Distributions.
Abstract
The fatigue and fracture properties of most engineering metals are determined by localized plastic deformation in the vicinity of defects such as cracks and/or geometric discontinuities such as notches. Local stresses in these regions may exceed the yield stress even through the bulk of the material is deforming elastically. A knowledge of the local plastic strain distribution at cracks and notches is fundamental to improve our understanding of the fatigue and fracture properties of laboratory specimens, and to correlate these properties with those of structures and components of the same material. The local plastic strain distributions at crack tips and geometric discontinuities have been examined using a variety of methods which fall into two general categories: a) direct observations of the displacements associated with the strains, and b) indirect methods in which measurements are compared with a set of calibrated standards. (Australia)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1986
- Accession Number
- ADA178518
Entities
People
- P. W. Beaver