Characterization of elastic-plastic corner deformation and stress fields
International Journal of Structural Integrity
ISSN: 1757-9864
Article publication date: 2 September 2019
Issue publication date: 23 September 2019
Abstract
Purpose
The purpose of this paper is to present the characteristics of elastic-plastic deformation and stress fields at the intersection of a crack front and the free surface of a three-dimensional body, referred to as corner fields.
Design/methodology/approach
The structures of elastic-plastic corner deformation field were assessed experimentally by looking at the corner border displacement and strain fields on the surface of a compact tension (CT) specimen using digital image correlation method. For assessment and verification purposes, the results were compared with the fields predicted through finite element analysis. The latter method was used further to assess the corner stress field.
Findings
The characteristics of displacement, strain and stress fields in the vicinity of a corner vertex in a finite geometry CT specimen in a strain hardening condition are independent of load and geometry. One of the distinctive features that becomes evident in this study is that the stress state at the corner vertex at θ=0° is a simple uniaxial tension.
Originality/value
This paper provides some insights on the structure of elastic-plastic corner fields that could optimistically be served as a fundamental framework towards the development of analytical solutions for elastic-plastic corner fields.
Keywords
Citation
Yusoff, N. and Yusof, F. (2019), "Characterization of elastic-plastic corner deformation and stress fields", International Journal of Structural Integrity, Vol. 10 No. 5, pp. 660-677. https://doi.org/10.1108/IJSI-03-2019-0023
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited