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An Experimental Study to Determine the Limits of CTOD Controlled Crack Growth / JR. Gordon, RL. Jones, NV. Challenger

Conference Author
Constraint Effects in Fracture (1991 : Indianapolis, Indiana)
Physical Description
1 online resource (19 pages) : illustrations, figures, tables
Additional Creators
Challenger, NV., Gordon, JR., Jones, RL., American Society for Testing and Materials, and ASTM International
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Summary
This paper presents the results of an experimental program to study size and geometry effects in CTOD R-curves. The results were obtained from room temperature unloading compliance R-curve tests on different-sized single-edge-notch-bend (SENB) specimens made from Ti-3Al-2.5V alloy, HY100 steel, and nickel-aluminum-bronze (NAB). The crack growth resistance was measured in terms of conventional CTOD, ?0 (i.e., as defined in BS 5762), CTOD corrected for crack growth, ?R, and CTOD derived using a double clip gage arrangement, ?dc. It was found that all the CTOD R-curves exhibited upswings after crack extensions corresponding to approximately 15% of the initial uncracked ligament. Based on the results obtained in this study, it is postulated that the crack growth limit for CTOD controlled crack growth in R-curves is 15% of the initial uncracked ligament. This condition alone, however, is not sufficient to guarantee size/geometry independent results. It is also necessary to have the same level of specimen constraint.
Dates of Publication and/or Sequential Designation
Volume 1993, Issue 1171 (January 1993)
Subject(s)
Other Subject(s)
ISBN
9780803152298 (e-ISBN)
9780803114814
0803114818
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 16.
Other Forms
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
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Also available in PDF edition.
Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1993. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
Source of Acquisition
ASTM International PDF Purchase price USD25.
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