OVERVIEW OF THE SIGNIFICANCE OF DEFECTS IN SUBMARINE PRESSURE HULLS

Authors
  1. Porter, J.F.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
It is well acknowledged that the present acceptance criteria for the presence of defects, such as cracks, porosity or slag in submarine pressure hull materials and weldments is overly conservative. As materials improve and perhaps more significantly as non destructive techniques for detecting defects improve, there is a need to re-evaluate the standards with the aim of producing a more realistic condemnation criteria. As such, a study investigating the role of defects on the overall structural integrity of submarine presure hulls has been initiated at DREA. The approach is to first experimentally determine the true residual stress states present in the butt and T-butt weldment joints using the blind hole drilling procedure. Measurements recorded after drilling over one hundred holes in an actual pressure hull indicate that the levels of surface residual stress are considerably lower than yield. TRUNCATED
Report Number
DREA-TC-87-310-SES-5-PAP-1 — @Paper presented at 2nd Canadian Forces/CRAD Meeting, Halifax, 26-28 May 1987; CONTAINED IN 88-02296
Date of publication
15 May 1987
Number of Pages
23
DSTKIM No
88-02279
CANDIS No
55503
Format(s):
Microfiche filmed at DSIS;Originator's fiche received by DSIS;Document Image stored on Optical Disk

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