Development of Constitutive Behavior of Materials for SDRW's
2007
Knauss, W. G.
This investigation was part of a failure analysis project concerned with repeated malfunctioning of sonar windows installed on vessels and submersibles. The problem encountered was the gradual failure of large wire reinforced rubber domes containing sonar equipment. The particular failure mode encountered was the corrosion of the wire reinforcement in such domes in the vicinity of seams on the forward centerline of these large structures. It appeared from the initial investigations as well as subsequent and detailed examinations that the construction of the seam with its multiple overlays led to local stress concentrations which could, under sufficiently high and prolonged sea states, induce failure in the rubber component of the structure with subsequent access by the sea water to the steel wire structure. Two aspects of assistance were involved under this contract: one addressed the assistance in the engineering and failure analysis of the typical structure, with repeated reviews of the progress and alternate design options; the other aspect concerned the development of constitutive description of the steel/rubber composite material used in the dome construction.
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