Abstract
With the accelerated use of woven composites in many industries like aerospace, marine, sports, construction, automobile and many more their repairs have become an inevitable part of it. The current problem with repairs is, even with precise machining there are bond failures due to inadequate surface quality. In this research, machining techniques like stepped and scarf repairs and abrasion techniques are used on the woven coupons to evaluate their influence on the surface characteristics. Preliminary evaluation of the surface characteristics is done using a surface profiler, to measure the topographical features like surface roughness and amplitude of the peaks and valleys. Further, the results obtained from the profiler are validated using microscopy and contact angle test to identify the trend between surface roughness and wettability. Finally, the results obtained from the various experiments helps us to identify an optimum surface quality needed prior to bonding in terms of surface roughness and contact angle. The results for 3K woven glass fibre shows an optimum surface roughness in the range of 2-4 µm and contact angle below 60˚
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