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Title: Application of the key curve method to determining J-R curves for A533B steel

Abstract

The experimental development is described of a key curve for compact specimens of A533B steel and the use of this experimental key curve to generate the J-Resistance curve directly from the load displacement records without obtaining crack length estimates from unloading compliance, ultrasonics, electric potential or other techniques. Two complete key curve functions were developed, the first using subsized fatique precracked specimens, the second using subsized but machine notched specimens. In each case eight 1/2 T compact specimens with crack lengths from a/W = 0.5 to 0.9 were used to generate a series of digital load displacement records which were assembled in a computer file as the key curve for geometrically similar compact specimens. This key curve can be thought of as defining the locus of load displacement records expected for geometrically similar compact specimens of this material for similar loading conditions if no crack extension were to take place. Deviations between the key curve function and the load displacement record for a particular specimen can then be attributed to crack extension and a calculation for the amount of crack extension can be made. The key curve also allows corrections to be made to J values to account for effectsmore » of this crack extension.« less

Authors:
Publication Date:
Research Org.:
Naval Academy, Annapolis, MD
OSTI Identifier:
5492072
Report Number(s):
NUREG/CR-1290
TRN: 80-005696
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; STEEL-ASTM-A533-B; TEARING INSTABILITY; CHEMICAL COMPOSITION; COMPUTER CALCULATIONS; CRACKS; MATHEMATICAL MODELS; MECHANICAL PROPERTIES; TENSILE PROPERTIES; ALLOYS; CARBON STEELS; INSTABILITY; IRON ALLOYS; IRON BASE ALLOYS; PLASMA INSTABILITY; PLASMA MACROINSTABILITIES; STEELS; 360103* - Metals & Alloys- Mechanical Properties

Citation Formats

Joyce, J A. Application of the key curve method to determining J-R curves for A533B steel. United States: N. p., 1980. Web. doi:10.2172/5492072.
Joyce, J A. Application of the key curve method to determining J-R curves for A533B steel. United States. https://doi.org/10.2172/5492072
Joyce, J A. 1980. "Application of the key curve method to determining J-R curves for A533B steel". United States. https://doi.org/10.2172/5492072. https://www.osti.gov/servlets/purl/5492072.
@article{osti_5492072,
title = {Application of the key curve method to determining J-R curves for A533B steel},
author = {Joyce, J A},
abstractNote = {The experimental development is described of a key curve for compact specimens of A533B steel and the use of this experimental key curve to generate the J-Resistance curve directly from the load displacement records without obtaining crack length estimates from unloading compliance, ultrasonics, electric potential or other techniques. Two complete key curve functions were developed, the first using subsized fatique precracked specimens, the second using subsized but machine notched specimens. In each case eight 1/2 T compact specimens with crack lengths from a/W = 0.5 to 0.9 were used to generate a series of digital load displacement records which were assembled in a computer file as the key curve for geometrically similar compact specimens. This key curve can be thought of as defining the locus of load displacement records expected for geometrically similar compact specimens of this material for similar loading conditions if no crack extension were to take place. Deviations between the key curve function and the load displacement record for a particular specimen can then be attributed to crack extension and a calculation for the amount of crack extension can be made. The key curve also allows corrections to be made to J values to account for effects of this crack extension.},
doi = {10.2172/5492072},
url = {https://www.osti.gov/biblio/5492072}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Feb 01 00:00:00 EST 1980},
month = {Fri Feb 01 00:00:00 EST 1980}
}