HIGH STRAIN RATE IMPACT STUDY OF SUBMARINE PRESSURE HULL WELDMENTS

Authors
  1. Bassim, M.N.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Manitoba Univ, Winnipeg MAN (CAN)
Abstract
The report describes the results of fracture toughness tests performed at high strain rates on three submarine steels, namely HY80, HY80 weldment and HY100 supplied by DREA. The high strain rates were achieved by using a specially designed version of a Split Hopkinson Pressure Bar. In the tests, a regular compact tension (CT) specimen is used. The load is applied by the action of a projectile travelling at very high speed which hits a swing-arm mechanism causing a mode I fracture to occur. A data acquisition and analysis system produces a load-displacement curve which allows calculation of J sub I max (dynamic) for these materials. Furthermore, to determine J sub IC (dynamic), stretch zone width measurements were performed on the fractured surfaces using scanning electron microscopy.
Report Number
DREA-CR-89-404 — Contractor Report
Date of publication
15 Feb 1989
Number of Pages
85
DSTKIM No
89-01885
CANDIS No
59810
Format(s):
Hardcopy;Originator's fiche received by DSIS

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