TY - GEN
T1 - Continuous sensors for mode selective actuation and reception of waves for structural health monitoring of woven composite laminates
AU - Kirikera, Goutham R.
AU - Petculescu, Gabriela
AU - Krishnaswamy, Sridhar
AU - Achenbach, Jan D.
PY - 2007
Y1 - 2007
N2 - The quantitative evaluation of damage in woven composites using mode selective excitation of Lamb waves is reported in this paper. PVDF (polyvinylidene fluoride) comb sensors are used to generate and detect a single plate mode. The top electrode is a single set of equidistant fingers connected in parallel to the same potential while the bottom electrode is kept at ground. First, a pair of such sensors is used to generate and detect a single plate mode. Group velocity changes of a wave packet traveling through the damaged area are used for quantitative damage estimation. Second, a new electrode configuration is used in order to improve the receiver signal. The proposed configuration referred to as continuous sensors, is used in structural health monitoring (SHM) for detection of growing cracks. Theoretical and experimental results are presented. In addition, an analog circuitry to actuate the structure at high frequency (∼1MHz) based on energy tapped from a vibrating cantilever beam (∼20Hz) is developed, towards a high-frequency energy-harvested SHM.
AB - The quantitative evaluation of damage in woven composites using mode selective excitation of Lamb waves is reported in this paper. PVDF (polyvinylidene fluoride) comb sensors are used to generate and detect a single plate mode. The top electrode is a single set of equidistant fingers connected in parallel to the same potential while the bottom electrode is kept at ground. First, a pair of such sensors is used to generate and detect a single plate mode. Group velocity changes of a wave packet traveling through the damaged area are used for quantitative damage estimation. Second, a new electrode configuration is used in order to improve the receiver signal. The proposed configuration referred to as continuous sensors, is used in structural health monitoring (SHM) for detection of growing cracks. Theoretical and experimental results are presented. In addition, an analog circuitry to actuate the structure at high frequency (∼1MHz) based on energy tapped from a vibrating cantilever beam (∼20Hz) is developed, towards a high-frequency energy-harvested SHM.
KW - Continuous sensors
KW - Energy harvesting
KW - Mode selective excitation and reception
KW - Quantitative prediction of damage
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U2 - 10.1117/12.715235
DO - 10.1117/12.715235
M3 - Conference contribution
AN - SCOPUS:35648996898
SN - 0819466530
SN - 9780819466532
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Health Monitoring of Structural and Biological Systems 2007
T2 - Health Monitoring of Structural and Biological Systems 2007
Y2 - 19 March 2007 through 22 March 2007
ER -