Nondestructive Determination of Elastic Constants of Thin Plates Based on PVDF Focusing Ultrasound Transducers and Lamb Wave Measurements
This paper presents a nondestructive method for determining elastic constants of thin isotropic plate using ultrasound transducer and Lamb wave measurement. Lens-less PVDF line-focus transducer and Lamb wave defocusing measurement are fabricated and established for measuring the multimode Lamb wave dispersion curves of stainless steel and glass plate samples. An modified V(f,z) image waveform processing is carried out to obtain the Lamb wave dispersion curves accurately from measured data. Matlab simplex optimization function is then further used for inversely determining Lames constants of isotropic plate sample. Measurement accuracy and potential applications for other types of nondestructive evaluation will be also addressed and discussed in this work.
Lamb Waves V(f z) Simplex optimization algorithm Elastic constants.
Leo-Shin WEI Cheng-Hsien CHUNG Yung-Chun LEE
Department of Mechanical Engineering, National Cheng Kung University No. 1, University Road, Tainan City 701, Taiwan R.O.C.
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
1096-1101
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）