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arXiv 0804.4695cond-mat.mtrl-sci
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各向异性弹性固体中简并横波的非线性演化方程

Nonlinear evolution equations for degenerate transverse waves in anisotropic elastic solids

Wlodzimierz Domanski, Andrew N. Norris

摘要:

横向弹性波在非线性各向同性和各向异性介质中表现不同。在各向同性固体中,波振幅演化方程中的二次非线性耦合是不可能的,但在各向异性材料中,这种耦合在某些方向上可能发生。我们确定的表达式负责耦合,我们推导出耦合正则演化方程的横波振幅的情况下,两重和三重对称的声轴。我们用立方晶体的例子来说明我们的考虑。

英文摘要:

Transverse elastic waves behave differently in nonlinear isotropic and anisotropic media. Quadratically nonlinear coupling in the evolution equations for wave amplitudes is not possible in isotropic solids, but such a coupling may occur for certain directions in anisotropic materials. We identify the expression responsible for the coupling and we derive coupled canonical evolution equations for transverse wave amplitudes in the case of two-fold and three-fold symmetry acoustic axes. We illustrate our considerations by examples for a cubic crystal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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