TITLE:
Low Velocity Impact Response on GFRP and GF-SMP Panels in Structural and High Frequency Bands
AUTHORS:
R. Basavanna, S. Raja, Karisiddappa
KEYWORDS:
Impact, Low Velocity, PZT Patches, GFRP, Composite Laminate, Transient Dynamics
JOURNAL NAME:
Advances in Aerospace Science and Technology,
Vol.5 No.2,
June
28,
2020
ABSTRACT: A low
velocity impact response study has been carried out on glass fibre composite
laminates, made up of regular aircraft grade epoxy (GFRP) and shape memory
polymer (GF-SMP). Under various impact loading intensities (4J, 6J, 12J), the
responses are measured by a network of PZT (Lead Zirconate Titanate) sensors. A
signal analysis methodology is subsequently developed to process the very high
frequency (60 MHz) sampled data. In two frequency bands, namely 0 - 2000 Hz and
0 - 100 KHz, the results are examined and the transient dynamic behaviours of
the composite laminates are evaluated. It is observed that both the laminates
have generated the high frequency structural waves (0 - 100 KHz), which can be
exploited to examine the BVID. However, GF-SMP laminate has shown some
advantage in terms of energy dissipation in the structural frequency band
(