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

• 作者: Karisiddappa R. Basavanna S. Raja
• 来源期刊: 航空科学与技术(英文)
• 学科: 工学
• 关键词: Impact Low Velocity PZT Patches GFRP Composite Laminate Transient Dynamics
• 年，卷（期）: 2020,（2）
• 页码范围: 58-70
• 页数: 13页
• 分类号: TB3

摘要

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 (<2000 Hz). Further, the GF-SMP laminate has demonstrated its capability to generate very high frequency structural waves, which could carry the damage information like BVID due to impact event to nearby sensors for impact event monitoring and health assessment.