Converging super-elliptic torsional shear waves in a bounded transverse isotropic viscoelastic material with nonhomogeneous outer boundary
Converging super-elliptic torsional shear waves in a bounded transverse isotropic viscoelastic material with nonhomogeneous outer boundary
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DOI：
10.1121/1.5134657
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发表时间：
2019-11-01
影响因子：
2.4
通讯作者：
Royston, Thomas J.
中科院分区：
文献类型：
--
作者：
Guidetti, Martina;Caratelli, Diego;Royston, Thomas J.
最近引入了一种理论方法[Guidetti和Royston，J.Acoust。SoC。上午好。144,2312-2323(2018)]，用于横向各向同性材料受轴对称激励，在材料外边界垂直于各向同性轴线时的径向收敛慢剪切波模式。这种方法是通过变换到具有各向同性属性的椭圆坐标系来实现的。将该方法推广到包含各向同性轴的平面内由轴对称扭转运动极化驱动的快剪切波的收敛。该方法涉及到具有各向同性性质的超椭圆形状的变换和使用数值有效的边值近似。(C)2019年美国声学学会
A theoretical approach was recently introduced [Guidetti and Royston, J. Acoust. Soc. Am. 144, 2312-2323 (2018)] for the radially converging slow shear wave pattern in transverse isotropic materials subjected to axisymmetric excitation normal to the axis of isotropy at the outer boundary of the material. This approach is enabled via transformation to an elliptic coordinate system with isotropic properties. The approach is extended to converging fast shear waves driven by axisymmetric torsional motion polarized in a plane containing the axis of isotropy. The approach involves transformation to a super-elliptic shape with isotropic properties and use of a numerically efficient boundary value approximation. (C) 2019 Acoustical Society of America