Damage identification in composite materials using ultrasonic based Lamb wave method |
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| Authors: | B.S. Ben B.A. Ben K.A. Vikram S.H. Yang |
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| Affiliation: | 1. Institute of Mechanical Engineering Technology, Kyungpook National University, Daegu, South Korea;2. Department of Mechanical Engineering (AUCE), Andhra University, Visakhapatnam 530 003, India;3. School of Mechanical Engineering, Kyungpook National University, Daegu 702-701, South Korea |
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| Abstract: | The paper presents an ultrasonic based Lamb waves propagation method for identifying and measuring the damage location in a material for SHM. The present work determines the experimental and analytical effects of various parameters on the sensitivity of damage detection and a methodology is proposed for estimating and measuring the location of damage in the test specimens. An experimental setup is used for generating Ao Lamb waves by calibrating ultrasonic pulse generation for optimal value of the parameters. The experiment is performed on two carbon fiber reinforced plastic bars in both undamaged and damaged state, where the two damaged states are (1) having a cut partway through the bar, perpendicular to the long axis of the bar and (2) having a circular hole. The Lamb wave propagation parameters are calibrated using the ultrasonic pulse generator test setup and the method was compared with direct measured values of ultrasonic instrument. |
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| Keywords: | Lamb waves Propagation parameters Damage detection SHM |
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