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Low Velocity Impact Response on GFRP and GF-SMP Panels in Structural and High Frequency Bands

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Document pages: 13 pages

Abstract: A lowvelocity impact response study has been carried out on glass fibre compositelaminates, made up of regular aircraft grade epoxy (GFRP) and shape memorypolymer (GF-SMP). Under various impact loading intensities (4J, 6J, 12J), theresponses are measured by a network of PZT (Lead Zirconate Titanate) sensors. Asignal analysis methodology is subsequently developed to process the very highfrequency (60 MHz) sampled data. In two frequency bands, namely 0 - 2000 Hz and0 - 100 KHz, the results are examined and the transient dynamic behaviours ofthe composite laminates are evaluated. It is observed that both the laminateshave generated the high frequency structural waves (0 - 100 KHz), which can beexploited to examine the BVID. However, GF-SMP laminate has shown someadvantage in terms of energy dissipation in the structural frequency band(

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