Reference Type:  Journal Article
Record Number: 1
Author: Hyland, C. W. K., Ferguson , W. G. and Butterworth, J. W.
Year: 2007
Title: Assessment of cyclic ductile endurance of structural steel members
Journal: Advanced Steel Construction
Volume: 4
Issue: 3
Pages: 20
Start Page: 210
Short Title: Assessment of cyclic ductile endurance of structural steel members
DOI: 10.18057/IJASC.2008.4.3.4
Keywords: Specific work of fracture, fracture toughness, structural ductility, cyclic endurance, seismic, finite element analysis, CTOD
Abstract: This paper describes a new method using Crack Tip Opening Displacement (CTOD) testing in conjunction with a relatively simple elasto-plastic finite element analysis to assess the likelihood of fast running or slow stable fracture during monotonic and cyclic loading of steel members.  The similitude relationship between monotonic and cyclic displacement ductility is then used to assess cyclic endurance of the steel member. The fracture toughness of steel defined by the critical specific work of fracture Rc of the steel is determined from CTOD specimens making allowance for remote plastic flow. A finiteelement model is used to assess elastic compliance of a cracked bar with varying lengths of cracks as well as to assess the inelastic displacement of the bar at calculated cracking loads.   Failure limit state surfaces comprising plastic hinging, plastic over-strength and cracking limits are plotted in 3-D surfaces to identify the characteristics of how fracture behaviour changes dramatically as the strain hardening and crack length increases.
Author Address: Secretary Manager, Steel Construction New Zealand Inc., PO Box 76403, Manukau City 2241, New Zealand