The fatigue crack growth rate in L-72 Al-alloy plate specimens with cold worked holes

Arora, PR and Dattaguru, B and Hande, Subramanya HS (1992) The fatigue crack growth rate in L-72 Al-alloy plate specimens with cold worked holes. In: Engineering Fracture Mechanics, 42 (6). pp. 989-1000.

PDF THE_FATIGUE_CRACK.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy

Abstract

A fatigue crack growth rate study has been carried out on L-72 aluminium alloy plate specimens with and without cold worked holes. The cold worked specimens showed significantly increased fatigue life compared to unworked specimens. Computer software is developed to evaluate the stress intensity factor for non-uniform stress distributions using Green's function approach. The exponents for the Paris equation in the stable crack growth region for cold worked and unworked specimens are 1.26 and 3.15 respectively. The reduction in exponent value indicates the retardation in crack growth rate. An SEM study indicates more plastic deformation at the edge of the hole for unworked samples as compared to the worked samples during the crack initiation period.

Item Type:	Journal Article
Publication:	Engineering Fracture Mechanics
Publisher:	Elsevier science
Additional Information:	Copyright of this article belongs to Elsevier science.
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering) Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	30 May 2011 05:47
Last Modified:	30 May 2011 05:47
URI:	http://eprints.iisc.ac.in/id/eprint/37769

Actions (login required)

View Item