0
RESEARCH PAPERS: Offshore Mechanics

An Analysis of a Crack in Weld by Using Near-Field as Well as Far-Field Crack Parameters

[+] Author and Article Information
M. Nakagaki

Department of Mechanical System Engineering, Kyushu Institute of Technology, Iizuka-City, Japan

C. W. Marschall, F. W. Brust

Battelle, Columbus Division, Columbus, OH 43201

J. Offshore Mech. Arct. Eng 112(4), 304-312 (Nov 01, 1990) (9 pages) doi:10.1115/1.2919871 History: Received October 15, 1987; Revised November 20, 1989

Abstract

A study of ductile crack growth characteristics in stainless steel welds is reported in this paper. A hybrid-type analysis of combined experimental, analytical, and predictive procedures on the subject is addressed. The study focuses on the effects of a stress/strain interaction phenomenon occurring between the crack tip and the weld-base material interface. Clear dependence of the crack initiation fracture characteristics on the weld size relative to the specimen size was found. Also, fracture toughness of a tungsten inert gas weld is shown to be comparable to that for the base stainless steel metal, whereas that of a submerged arc weld is shown to be significantly lower than the base metal. Because of the stress/strain nonproportionality associated with a local unloading due to crack growth in a ductile material, the use of a crack-tip parameter such as ΔTP * or Ĵ -integral was emphasized. On the other hand, prediction of a crack instability was attempted using a less rigorous J -estimation scheme procedure.

Copyright © 1990 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Related

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In