DOI QR코드

DOI QR Code

Non-contact damage monitoring technique for FRP laminates using guided waves

  • Garg, Mohit (Department of Mechanical Engineering, Thapar University) ;
  • Sharma, Shruti (Department of Civil Engineering, Thapar University) ;
  • Sharma, Sandeep (Department of Mechanical Engineering, Thapar University) ;
  • Mehta, Rajeev (Department of Chemical Engineering, Thapar University)
  • 투고 : 2015.08.09
  • 심사 : 2016.02.26
  • 발행 : 2016.05.25

초록

A non-contact, in-situ and non-invasive technique for health monitoring of submerged fiber reinforced polymers (FRP) laminates has been developed using ultrasonic guided waves. A pair of mobile transducers at specific angles of incidence to the submerged FRP specimen was used to excite Lamb wave modes. Lamb wave modes were used for comprehensive inspection of various types of manufacturing defects like air gaps and missing epoxy, introduced during manufacturing of FRP using Vacuum Assisted Resin Infusion Molding (VARIM). Further service induced damages like notches and surface defects were also studied and evaluated using guided waves. Quantitative evaluation of transmitted ultrasonic signal in defect ridden FRPs $vis-{\grave{a}}-vis$ healthy signal has been used to relate the extent of damage in FRPs. The developed technique has the potential to develop into a quick, real time health monitoring tool for judging the service worthiness of FRPs.

키워드

과제정보

연구 과제 주관 기관 : Naval Research Board

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