The capability of embedded piezoelectric wafer active sensors (PWAS) to perform in-situ Nondestructive evaluation (NDE) for structural health monitoring (SHM) of fiber reinforced polymer (FRP) composite plate like structures is explored. The basic principles of Lamb wave transmission and reception with PWAS transducers were verified with simple laboratory experiments, performed on both isotropic and anisotropic plates. In the second case, Noncontact measurements for Lamb wave sensing using Laser Doppler Velocimeter were explored. © 2007 American Institute of Physics.

Krishnan Balasubramaniam

Department of Mechanical Engineering

C V Krishnamurthy

Department Of Physics

Purnendu Padma Kumar

B. V. Soma Sekhar

Bruce W. Maxfield

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

In‐Situ Damage Detection in Plate Structures Using PWAS and Non‐Contact Laser Doppler Velocimeter

AIP Conference Proceedings

The feasibility of imaging low-velocity impact damage in thin multi-layered composite plates using Lamb wave tomography is explored. Low-velocity impact damages (6-20 J) are induced by the drop-weight method on graphite fiber epoxy matrix composite laminates of cross-ply and quasi-isotropic lay-up and the damage assessment is carried out by conventional C-scans and ultrasonic Lamb wave tomography. Lamb wave based tomography based on modified cross-hole sensor configuration is used to image the damage as a function of impact energy for graphite composite plates. The reconstructed tomograms are able to capture the lateral extent of the damage even for impact energies as low as 11 J in a 2 mm graphite epoxy quasi-isotropic lay-up sample that can be classified as barely visible impact damage. Copyright © 2006 SAGE Publications.

Structural Health Monitoring

Structural health monitoring of fiber-reinforced composite plates for low-velocity impact damage using ultrasonic Lamb wave tomography

Smart Materials and Structures

Modeling and testing of PZT and PVDF piezoelectric wafer active sensors

Structural health monitoring using scanning laser vibrometry: I. Lamb wave sensing

Structural Health Monitoring: An International Journal

Piezoelectric Wafer Embedded Active Sensors for Aging Aircraft Structural Health Monitoring

Interlacing for improved performance of laminates with embedded devices

In-situ damage detection in plate structures using PWAS and non-contact Laser Doppler Velocimeter

Journal	AIP Conference Proceedings
ISSN	0094243X
Open Access	No