Experimental Investigation of the Strength of Damaged Pressure Hulls – Phase 1

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Authors
  1. MacKay, J.R.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Abstract
This document presents the results of Phase 1 of an experimental program to determine the collapse pressures of small-scale pressure hulls (ring-stiffened cylinders) with various amounts and patterns of simulated material loss due to corrosion. Six ring-stiffened aluminium cylinders have been tested as part of Phase 1: two undamaged specimens, three specimens with simulated localized corrosion, and one specimen with reinforced hull penetrations. Material loss was found to decrease the collapse pressure of each of the corroded specimens relative to similar undamaged cylinders. This loss of strength was attributed to reduced structural stiffness in the corroded regions, and was typically associated with an early onset of material yield. In two cases, yielding occurred at the corrosion well before the ultimate collapse load, and would thus further decrease the allowable working load. The results of the entire experimental program, which will include upwards of 40 cylinders, will be used to develop guidelines for corrosion tolerance, and to validate analytical and numerical methods.

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Keywords
pressure hull;ring-stiffened cylinder;submarine;collapse pressure;corrosion;structural analysis;Ring-stiffened cylinder
Report Number
DRDC-ATLANTIC-TM-2006-304 — Technical Memorandum
Date of publication
01 Feb 2007
Number of Pages
112
DSTKIM No
CA029853
CANDIS No
528274
Format(s):
CD ROM

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