Application of a Lamb waves based technique for structural health monitoring of GFRP undercyclic loading

International Conference on Mechanical Engineering, Automation and Control Systems 2015

机械制造;无线电电子学;计算机科学

Eremin, A.^1,2 ; Byakov, A.^1,2 ; Panin, S.^1,2 ; Burkov, M.^1,2 ; Lyubutin, P.^1,2 ; Sunder, R.^3

Inst. of Strength Phys. and Mat. Science of the Siberian Branch of the Russian Academy of Sciences, 2/4, Akademicheskiy ave., Tomsk

634021, Russia^1

Tomsk Polytechnic University, 30, Lenina ave., Tomsk

634050, Russia^2

Bangalore Integrated System Solutions Ltd, Peenya Industrial Area, 497E 14th Cross, Bangalore

560058, India^3

关键词: Adhesively bonded;    Glass fiber reinforced polymer;    Informative parameters;    Mechanical state;    Optical image characterizations;    Received signals;    Specimen surfaces;    Ultrasonic techniques;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/124/1/012084/pdf
DOI  :  10.1088/1757-899X/124/1/012084

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

A Lamb wave based ultrasonic technique as well as optical image characterization was utilized to estimate a current mechanical state of glass fiber reinforced polymers (GFRP) under cyclic tension. The ultrasonic acoustic method was applied in a 'pitch-catch' mode using piezoelectric transducers adhesively bonded onto a specimen surface. Numerical evaluation of acoustic data was performed by calculating two informative parameters: maximum of amplitude of the received signal and variance of signal envelopes. Optical images were registered and then analysed by calculating Shannon entropy that makes it possible to characterize changing of GFRP specimen translucency. The obtained results were treated in order to find out the relation between the current mechanical state of a specimen and informative parameter values being computed from the acoustic and optical signals.