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Finite element modeling of heating phenomena of cracks excited by high-intensity ultrasonic pulses |
Chen Zhao-Jiang(陈赵江), Zheng Jiang(郑江), Zhang Shu-Yi(张淑仪)†, Mi Xiao-Bing(米小兵), and Zheng Kai(郑凯) |
Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China |
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Abstract A three-dimensional thermo-mechanical coupled finite element model is built up to simulate the phenomena of dynamical contact and frictional heating of crack faces when the plate containing the crack is excited by high-intensity ultrasonic pulses. In the finite element model, the high-power ultrasonic transducer is modeled by using a piezoelectric thermal-analogy method, and the dynamical interaction between both crack faces is modeled using a contact-impact theory. In the simulations, the frictional heating taking place at the crack faces is quantitatively calculated by using finite element thermal-structural coupling analysis, especially, the influences of acoustic chaos to plate vibration and crack heating are calculated and analysed in detail. Meanwhile, the related ultrasonic infrared images are also obtained experimentally, and the theoretical simulation results are in agreement with that of the experiments. The results show that, by using the theoretical method, a good simulation of dynamic interaction and friction heating process of the crack faces under non-chaotic or chaotic sound excitation can be obtained.
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Received: 11 April 2010
Revised: 23 May 2010
Accepted manuscript online:
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PACS:
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02.70.Dh
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(Finite-element and Galerkin methods)
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43.38.+n
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(Transduction; acoustical devices for the generation and reproduction of sound)
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81.70.-q
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(Methods of materials testing and analysis)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10574073). |
Cite this article:
Chen Zhao-Jiang(陈赵江), Zheng Jiang(郑江), Zhang Shu-Yi(张淑仪), Mi Xiao-Bing(米小兵), and Zheng Kai(郑凯) Finite element modeling of heating phenomena of cracks excited by high-intensity ultrasonic pulses 2010 Chin. Phys. B 19 118104
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