Structural damping of composite materials using combined FE and lamb wave method

B.S. Ben, B.A. Ben, S.H. Kweon and S.H. Yang

Abstract

The article presents the methodology for finding material damping capacity at higher frequency and at relatively lower amplitudes. The Lamb wave dispersion theory and loss less finite element model is used to find the damping capacity of composite materials. The research has been focused on high frequency applications materials. The method was implemented on carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer (GFRP) plates. The Lamb waves were generated using ultrasonic pulse generator setup. The hybrid method has been explored in this article and the results have been compared with bandwidth methods available in the literature.

Key Words

lamb wave; acoustic emission; vibration; carbon fibers; glass fibers; damping

Address

B.S. Ben : Department of Mechanical Engineering, National Institute of Technology, Warangal, 506004, India B.A. Ben : Department of Mechanical Engineering (AUCE), Andhra University, Visakhapatnam, 530003, India S.H. Kweon and S.H. Yang : School of Mechanical Engineering, Kyungpook National University, Daegu 702-701,South Korea

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