Summary of Acoustic and Mechanical Characterization of Composite Sonar Dome Materials

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Authors
  1. Hiltz, J.A.
  2. Szabo, J.P.
  3. Russell, A.J.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
This report summarizes research carried out under a DMCS 3 (DMSS 7) tasking entitled "Comparison of the Acoustic, Self Noise, and Mechanical Properties of Composite and Stainless Steel Sonar Dome Materials". It incorporates results from several contracted research programs and DREA Technical Memoranda and is meant to provide a concise record of the tasked research. Static (tensile and compression tests), fatigue and impact testing were used to characterize the mechanical properties of high strength polyethylene (Spectra) and glass fibre composites. Insertion loss measurements were used to characterize the acoustic performance of the composites. The effect of impact damage and angle of incidence of sound on the performance of the composites were also measured. The results show that Spectra fibre composites have superior acoustic properties compared to glass fibre composites and the double walled stainless steel presently used in the C5 sonar dome. However, the mechanical properties of the Spectra composites were inferior to the glass composites.
Keywords
C5 sonar;Spectra Fiber;Fibre glass;Epoxy;Cyanate ester;Tensile modulus;Compressive modulus
Report Number
DREA-TM-1999-120 — Technical Report
Date of publication
01 Aug 1999
Number of Pages
48
DSTKIM No
CA000128
CANDIS No
512082
Format(s):
Hardcopy;Document Image stored on Optical Disk

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