Multiple performance characteristics optimisation in drilling of glass fibre reinforced polyester composite at different weightage of performance by Grey relational analysis. (1st January 2012) - Hansda, Sunil
The delamination is a major problem associated with the drilling of chopped glass fibre reinforced polyester composites. It reduces the structural integrity of the material, results in poor assembly tolerance and has the potential for long term performance deterioration. Surface roughness is also an important aspect of drilling fibre reinforced polyester composites. Poor surface finish can cause high stress on rivets and bolts, leading to failure. Optimisation of process parameters for multiple performance characteristics for this material is yet to be reported. In the present investigation, therefore, feed rate, material thickness and cutting velocity were chosen as drilling parameters. Delamination factor and average surface roughness were taken as the measure of performances. Experiments were conducted based on Taguchi L9 (3 4 ) orthogonal array design. Analysis was performed based on Grey-relational analysis. Relative contribution and optimal combination of different process parameters were determined at different weightage value of performances.