Rapid Inspection of Aircraft Components using Laser Doppler Vibrometry and Computational Techniques

2009-2014

The objective of this project is to establish rapid inspection of structural components using Laser Doppler Vibrometry (LDV) as a new laser-ultrasonic inspection method and develop an integrated platform. A collaborative research component of this project aims to develop LDV based signal processing techniques based on guided wave theory by the project partner Georgia Institute of Technology USA. The platform development effort aims to address various aspects of inspection processes for various different types of metallic and composite structural components of aircrafts. Specific objective is to demonstrate feasibility of the new technology for application in large area scanning based inspection, associated quantitative prediction regarding hidden and inaccessible damages using guided wave propagation theory and computational techniques.

Remote monitoring of structures with laser Doppler ultrasound; image shows a 3D Laser scanning of a composite structural joint with hidden damage. Inset shows the hidden damage detected with the help of a new technique of ultrasound Doppler imaging and computation.

Project Partners

India Indian Institute of Science Bangalore/India

USA Georgia Institute of Technology Atlanta/USA

Contact

India Prof. D. Roy Mahapatra Department of Aerospace Engineering Indian Institute of Science, Bengaluru/ India Email droymahapatra@aero.iisc.ernet.in

USA Prof. S. Hanagud School of Aerospace Engineering, Georgia Institute of Technology, Atlanta/USA Email hanagud@aerospace.gatech.edu

Research Funding

NPMASS Program, ADA, DRDO

Government of India

Publication

Laser Doppler imaging of delamination in a composite T-joint with remotely located ultrasonic actuators, G. Kolappan Geetha, D. Roy Mahapatra, S. Gopalakrishnan, S. Hanagud, Composite Structures, 147, 197-210 (2016).