IMPACT PROPERTIES OF COMPOSITE SONAR DOME MATERIALS

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Authors
  1. Szabo, J.P.
  2. Russell, A.J.
  3. Hiltz, J.A.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
In an effort to reduce the costs associated with the repair and overhaul of the C5 stainless steel sonar dome, DMSS-7 is examining the feasibility of using composite materials in the C5 dome. As part of the project, DREA was tasked to study the acoustic and mechanical properties of glass and Spectra (TRADEMARK) reinforced composites panels. This paper discusses the effects of impact damage on the acoustic properties of the composite panels. A total of six 30 cm x 30 cm panels were impacted using a drop tower until damage was evident both visually and ultrasonically. The six panels were fabricated using various combinations of reinforcing fibre, resin system, and weave. The normal incidence insertion loss in the 1 - 10 kHz range was measured for both damaged and undamaged panels using a parametric array source and a PVDF hydorphone. The effect of water uptake on the insertion loss, and the implications for sonar performance will be discussed.
Report Number
DREA-SR-97-002-PAP-9 — CONTAINED IN 98-00986
Date of publication
01 Oct 1997
Number of Pages
35
DSTKIM No
98-00995
CANDIS No
507212
Format(s):
Hardcopy;Document Image stored on Optical Disk

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