FRACTURE CONTROL FOR SURFACE SHIPS

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Authors
  1. KarisAllen, K.
  2. Matthews, J.R.
Corporate Authors
Facts Engineering Inc, Halifax NS (CAN);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Determining susceptibility of structural steels and weldments to transgranular cleavage instabilities is of primary importance in the safe design of any structure. Gaining acceptance during the Liberty Ship failures during the Second World War, the Charpy V-notch test (ASTM E23) has since dominated material transition curve testing in the nuclear, pipeline, pressure vessel, shipping and offshore industries. Acceptance has been inpart derived from the inexpensive and simplistic nature of the test. It was recognized early on that there were a number of serious problems associated with the interpretation of the data realized from such a test. Of these perhaps the most significant was the fact that because of the notch detail and small size of the specimen, the transition curve obtained may not reflect actual structural performance of the material. Debate on the magnitude of the transition curve shift still continues (especially with the increasing use of thermo-mechanically controlled rolled steels). DREA has been developing alternative testingt procedures which provide directly transferable, structurally relevant temperature transition data. These tests will be described with respect to their applicability to fracture control issues of CF surface ships.
Report Number
DREA-NAMT-95-4-PAP-3 — CONTAINED IN 99-00779
Date of publication
30 May 1995
Number of Pages
16
DSTKIM No
99-00797
CANDIS No
510361
Format(s):
Hardcopy;Document Image stored on Optical Disk

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