Guided circumferential waves in orthotropic cylindrical curved plate and the mode conversion by the end-reflection |
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Authors: | Yu Jiangong Wu Bin He Cunfu |
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Institution: | College of Mechanical Engineering and Applied Electronic Technology, Beijing University of Technology, Ping Le Yuan 100#, Chaoyang District, Beijing 100022, PR China |
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Abstract: | In ultrasonic nondestructive inspection of large-diameter pipes and curved plate, longitudinal cracks are detected more efficiently by using guided circumferential waves. In the present, the study of guided circumferential waves and their application in detecting longitudinal defect were relative adequate when pipe material is isotropic. Based on linear three-dimensional elasticity, an orthogonal polynomial series expansions approach is used for determining the guided circumferential waves dispersion curves in homogeneous infinitely long orthotropic hollow cylinders. Results are compared with those published earlier and with the finite element simulation to check up the accuracy and range of applicability of this polynomial approach. Through the analysis of the displacements distributions and finite element simulation, the mode conversion of guided circumferential waves by end-reflection in cylindrical curved plate is discovered. |
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Keywords: | Orthotropic cylindrical plate Guided circumferential waves Orthogonal polynomial Mode conversion Finite element simulation |
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