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Numerical Simulation Analyses on Thick Wall Pipe with Radial Cracks Using Circumferential Lamb Wave
Abstract:
The thick wall pipes have been widely used in the field of petrochemical industry, nuclear power, weapons and special equipment. In this paper, the propagation characteristics of circumferential Lamb wave in thick wall pipe and the interaction law with radial cracks were studied. A large number of simulation were carried out by using the commercial finite element software ABAQUS. The propagation characteristics of circumferential Lamb wave in thick wall pipe were analyzed. The research results show that the propagation process of Lamb wave in thick wall pipes are totally different from with that in the thin wall pipes, the energy distribution in the wall thickness direction are changing constantly. It is hard to evaluate the depth of smaller defects. The influence of various factors on acoustic field distribution should be considered synthetically in the practical inspection, such as the size of crystal, the angle of wedge, the excited signal. So detection sensitivity of the small defects can be improved.
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105-109
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Online since:
June 2014
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© 2014 Trans Tech Publications Ltd. All Rights Reserved
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