Detection of impact damage on thermal protection systems using thin-film piezoelectric sensors for integrated structural health monitoring

2008 ◽  
Author(s):  
Jeong K. Na ◽  
Samuel J. Kuhr ◽  
Kumar V. Jata
Keyword(s):  
Thin Film ◽  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Thermal Protection ◽  
Impact Damage ◽  
Piezoelectric Sensors ◽  
Thermal Protection Systems ◽  
Structural Health ◽  
Protection Systems

Structural Health Monitoring of Space Vehicle Thermal Protection Systems

2013 ◽  
Vol 558 ◽  
pp. 268-280 ◽  
Author(s):  
Nigel Hoschke ◽  
Don C. Price ◽  
D. Andrew Scott ◽  
W. Lance Richards
Keyword(s):  
Acoustic Emission ◽  
Structural Health Monitoring ◽  
Optical Fibre ◽  
Health Monitoring ◽  
Thermal Protection ◽  
Successful Implementation ◽  
Fibre Bragg Grating ◽  
Thermal Protection Systems ◽  
Structural Health ◽  
Protection Systems

The thermal protection systems of spacecraft are vulnerable to damage from impacts by foreign objects moving at high velocities. This paper describes a proposed novel structural health monitoring system that will detect, locate and evaluate the damage resulting from such impacts. This system consists of a network of intelligent local agents, each of which controls a network of piezoelectric acoustic emission sensors to detect and locate an impact, and a network of optical fibre Bragg grating sensors to evaluate the effect of the impact damage by means of a thermographic technique. The paper concentrates on two issues that are critical to the successful implementation of the proposed SHM system: measurement of the elastic properties of the thermal protection material, knowledge of which is essential to the design and operation of the acoustic emission sensor network; and investigation of the practical feasibility of a switched network of optical fibre sensors.

scholarly journals DIRECT INTEGRATION OF THIN FILM PIEZOELECTRIC SENSORS WITH STRUCTURAL MATERIALS FOR STRUCTURAL HEALTH MONITORING

2006 ◽  
Vol 83 (1) ◽  
pp. 139-148 ◽  
Author(s):  
W. D. NOTHWANG ◽  
S. G. HIRSCH ◽  
J. D. DEMAREE ◽  
C. W. HUBBARD ◽  
M. W. COLE ◽  
...  
Keyword(s):  
Thin Film ◽  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Structural Materials ◽  
Piezoelectric Sensors ◽  
Direct Integration ◽  
Structural Health

scholarly journals Smart Sensing Technologies for Structural Health Monitoring of Civil Engineering Structures

2010 ◽  
Vol 2010 ◽  
pp. 1-13 ◽  
Author(s):  
M. Sun ◽  
W. J. Staszewski ◽  
R. N. Swamy
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Smart Materials ◽  
Civil Engineering ◽  
Piezoelectric Sensors ◽  
Sensors And Actuators ◽  
Engineering Structures ◽  
Structural Health ◽  
Civil Engineering Structures ◽  
Smart Sensing

Structural Health Monitoring (SHM) aims to develop automated systems for the continuous monitoring, inspection, and damage detection of structures with minimum labour involvement. The first step to set up a SHM system is to incorporate a level of structural sensing capability that is reliable and possesses long term stability. Smart sensing technologies including the applications of fibre optic sensors, piezoelectric sensors, magnetostrictive sensors and self-diagnosing fibre reinforced composites, possess very important capabilities of monitoring various physical or chemical parameters related to the health and therefore, durable service life of structures. In particular, piezoelectric sensors and magnetorestrictive sensors can serve as both sensors and actuators, which make SHM to be an active monitoring system. Thus, smart sensing technologies are now currently available, and can be utilized to the SHM of civil engineering structures. In this paper, the application of smart materials/sensors for the SHM of civil engineering structures is critically reviewed. The major focus is on the evaluations of laboratory and field studies of smart materials/sensors in civil engineering structures.

A Strain Sensing Structural Health Monitoring System for Delaminated Composite Structures

2012 ◽  
Vol 249-250 ◽  
pp. 849-855 ◽  
Author(s):  
Andrea Alaimo ◽  
Alberto Milazzo ◽  
Calogero Orlando
Keyword(s):  
Structural Health Monitoring ◽  
Fiber Optics ◽  
Health Monitoring ◽  
Composite Structures ◽  
Piezoelectric Sensors ◽  
Strain Sensing ◽  
Health Monitoring System ◽  
Structural Health ◽  
Monitoring Model ◽  
Element Approach

Structural Health Monitoring (SHM) for composite materials is becoming a primary task due to their extended use in safety critical applications. Different methods, based on the use of piezoelectric transducers as well as of fiber optics, has been successfully proposed to detect and monitor damage in composite structural components with particular attention focused on delamination cracks.In the present paper a Structural Health Monitoring model, based on the use of piezoelectric sensors, already proposed by the authors for isotropic damaged components, is extended to delaminated composite structures. The dynamic behavior of the host damaged structure and the bonded piezoelectric sensors is modeled by means of a boundary element approach based on the Dual Reciprocity BEM. The sensitivity of the piezoelectric sensors has been studied by varying the delamination length characterizing the skin/stiffener debonding phenomenon of composite structures undergoing dynamic loads.

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