Impact Damage Localisation with Piezoelectric Sensors under Operational and Environmental Conditions

Sensors

M. H. Ferri Aliabadi¹  Zahra Sharif Khodaei¹  Mohammad Saleh Salmanpour¹ 

[1] Department of Aeronautics, Imperial College London, Kensington, London SW7 2AZ, UK;

关键词: structural health monitoring;    temperature compensation;    Lamb wave;    CFRP;    delay and sum;    piezoelectric;    vibration;   

DOI  :  10.3390/s17051178

来源: DOAJ

【 摘 要 】

Guided-wave structural health monitoring (SHM) systems with piezoelectric sensors are investigated for localisation of barely visible impact damage in CFRP plates under vibration and different thermal conditions. A single baseline set is used in a delay-and-sum algorithm with temperature correction for damage localisation in a large temperature range. Damage localisation is also demonstrated under transient thermal conditions, with signals recorded while the temperature is rapidly decreased. Damage severity due to successive impact events is studied under constant temperature. Damage is also localised when the plate is subjected to random vibration.

【 授权许可】

Unknown