State Space Approach to Characterize Rayleigh Waves in Nonlocal Thermoelastic Medium with Double Porosity under Three-Phase-Lag Model

IF 0.7 4区 数学 Q3 MATHEMATICS, APPLIED Computational Mathematics and Mathematical Physics Pub Date : 2024-04-22 DOI:10.1134/s0965542524030060
Chandra Sekhar Mahato, Siddhartha Biswas
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Abstract

The present article focuses on the Rayleigh surface wave propagation in homogeneous isotropic thermoelastic medium. This works aims to develop a new nonlocal elasticity model based on three-phase-lag model of hyperbolic thermoelasticity under double porosity structure. New constitutive relations and equations are derived using nonlocal continuum mechanics. State space approach is employed to solve the problem. Frequency equation is derived using appropriate boundary conditions. Path of surface particles is found elliptical at the time of Rayleigh surface wave propagation. Different characteristics of Rayleigh waves are calculated numerically and presented graphically for different wave number. Various characteristics of wave for different thermoelastic models are also presented graphically. The effect of nonlocal parameters and void parameters on phase velocity, attenuation coefficient, penetration depth, and specific loss of Rayleigh waves are shown graphically. Some special cases are deduced from this study which agree with the existing literatures.

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用状态空间法描述三相滞后模型下具有双孔隙率的非局部热弹性介质中的瑞利波
摘要 本文主要研究雷利面波在均质各向同性热弹性介质中的传播。本文以双孔隙结构下双曲热弹性的三相滞后模型为基础,建立了一种新的非局部弹性模型。利用非局部连续介质力学推导出新的构成关系和方程。采用状态空间方法来解决问题。利用适当的边界条件推导出频率方程。发现表面粒子的路径在瑞利表面波传播时是椭圆形的。对不同波数的瑞利波的不同特性进行了数值计算,并以图表形式展示。不同热弹性模型的波的各种特征也以图表形式呈现。非局部参数和空隙参数对雷利波的相速度、衰减系数、穿透深度和比损耗的影响用图表表示。本研究还推导出一些特殊情况,与现有文献相吻合。
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来源期刊
Computational Mathematics and Mathematical Physics
Computational Mathematics and Mathematical Physics MATHEMATICS, APPLIED-PHYSICS, MATHEMATICAL
CiteScore
1.50
自引率
14.30%
发文量
125
审稿时长
4-8 weeks
期刊介绍: Computational Mathematics and Mathematical Physics is a monthly journal published in collaboration with the Russian Academy of Sciences. The journal includes reviews and original papers on computational mathematics, computational methods of mathematical physics, informatics, and other mathematical sciences. The journal welcomes reviews and original articles from all countries in the English or Russian language.
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