Diffraction of SH-waves by a cylinder based on inhomogeneous spring interface model

作者：Liu Xi Qiang^*; Wei Pei Jun; Zhang Gui; Wu Ou

来源：Journal of PLA University of Science and Technology(Natural Science Edition), 2011, 12(4): 372-377.

• Far-field scattering
• Interface crack
• Scattering cross-section
• SH-wave
• Spring model

To study the diffraction of SH-waves by single cylinder inclusion based on inhomogeneous interface spring model, the problem that the orthogonal properties of wave functions can not be used under the inhomogeneous spring interface condition was solved by the discretization along the circumference, and a linear algebraic equation sets was derived from the interface conditions. The linear algebraic equation sets were solved numerically and the wave function expansion coefficients were obtained. The numerical simulation was carried out for the composites Ge-Al. Both scattering cross-section and far-field scattering amplitude were computed. In addition, the scattering problem of single cylinder with local debond could be solved in the present inhomogeneous interface spring model assuming that the spring flexible coefficient at the debond region was infinite. The numerical results indicate that both the scattering cross-section and the far-field scattering amplitude are related with the number and the location of the cracks, and the calculation results are closer to the debonded case gradually as the number of the cracks increases.

• 出版日期2011