ISSN: 1945-7553
CODEN: JTEVAB
Published Online: 21 October 2004
Page Count: 7

Fatigue Crack Closure and Crack Growth Following an Overload

Verma, BB
National Institute of Technology, Rourkela,

Pandey, RK
Indian Institute of Technology, New Delhi,

(Received 21 January 2002; accepted 3 May 2004)

Abstract

The present investigation studies the effect of a single tensile overload cycle on fatigue crack closure and its mechanism. Attempts have also been made to study the crack growth kinetics following the overload application. It is concluded that Stage I-type of crack propagation occurs in the early stage of crack growth subsequent to overloading and the same is dominated by asperity-induced closure. A material - and loading-independent relationship has also been attempted between an overload-induced closure parameter and the overloading ratio.

Keywords:
overload, fatigue crack closure, crack growth retardation, overloading ratio, Stage I crack extension

Paper ID: JTE11142
DOI: 10.1520/JTE11142
ASTM International is a member of CrossRef.