ASSESSING THE LONG TERM DURABILITY OF GLASS FIBRE COMPOSITES

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Authors
  1. Russell, A.J.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
This paper describes part of a test program being carried out to substantiate the long term durability of glass fibre-re-inforced composites for use in sonar domes and other Naval applications. This program, which was designed to encompass the combined effects of fatigue loading, impact damage and the marine environment, is generating data for material selection purposes as well as providing insight into degradation mechanisms. The testing reported here includes cyclic loading of 9 mm thick woven fabric composite laminates loaded in four point bending at R-ratios of R = 0.1 and R = -1 (fully reversed) as well as under bi-axial conditions (also at R = 0.1). An approach for predicting impact resistance is described and some results are presented which show the level of protection afforded by several different elastomeric coatings to 10 mm thick panels subjected to low velocity impact. In addition, the nature of the micro-cracking observed in two different glass fibre materials subjected to the aforementioned tests is compared.
Keywords
Sonar domes
Date of publication
01 Feb 1988
Number of Pages
13
DSTKIM No
98-00628
CANDIS No
507459
Format(s):
Hardcopy;Document Image stored on Optical Disk

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