Affiliation:
1. Institute for Microstructural Sciences, National Research Council, Ottawa, Ontario K1A OR6, Canada
Abstract
The generation and reflection of guided elastic waves in hollow cylinders with corrosion defects have been investigated numerically for the purpose of nondestructive evaluation (NDE) of tubular structures. A new guided wave transducer model, time-delay periodic ring arrays (TDPRAs), has been used to generate the axisymmetric guided wave modes in hollow cylinders, and this is simulated by a finite element calculation. Unidirectional guided wave emission can be achieved by arranging a TDPRA’s parameters according to the principle of constructive and destructive interference. The guided wave reflections by axisymetric and nonaxisymmetric corrosion defects are analyzed using a 2-D and a 3-D FE simulation, respectively. The reflection features as well as mode conversion under the L0,1 and L0,2 mode incidences are discussed in association with the corrosion depth, the axial and circumferential extents in hollow cylinders.
Subject
Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality
Reference21 articles.
1. Chimenti, D. E.
, 1997, “Guided Waves in Plates and Their Use in Materials Characterization,” Appl. Mech. Rev., 50, pp. 247–284.
2. Rose, J. L., Rajana, K. M., and Carr, F. T., 1994, “Ultrasonic Guided Wave Inspection Concepts for Steam Generator Tubing,” Mater. Eval., 52, pp. 307–311.
3. Alleyne, D. N., and Cawley, P., 1997, “Long Range Propagation of Lamb Waves in Chemical Plant Pipework,” Mater. Eval., 55, pp. 504–508.
4. Ditri, J. J., and Rose, J. L., 1992, “Excitation of Guided Elastic Wave Modes in Hollow Cylinders by Applied Surface Tractions,” J. Appl. Phys., 72, pp. 2589–2597.
5. Alleyne, D. N., and Cawley, P., 1996, “The Excitation of Lamb Waves in Pipes Using Dry Coupled Piezoelectric Transducers,” J. Nondestruct. Eval., 15, pp. 11–20.
Cited by
40 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献