Anti‐plane stress analysis for V‐notch in a piezomagnetic half space under SH wave

Xi‐Meng Zhang, Hui Qi
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Abstract

In this paper, the anti‐plane stress analysis of a V‐notch with complex boundary conditions in a piezomagnetic half space is studied. Firstly, SH wave is considered as an external load acting on piezomagnetic half space, on the basis of repeated image superposition, the analytical expression of scattering wave is conducted, which satisfies the boundary conditions on the boundary of the half space. Then, the analytical expression of standing wave is established, which satisfies the stress free and magnetic insulation conditions on the boundaries of V‐notch by the fractional Bessel function expansion method and Graf addition theorem. Finally, Green's function method is applied, the half space is divided into two parts along the vertical interface, a pair of in‐plane magnetic field and out‐plane forces are applied on the vertical interface, and the first kind of Fredholm integral equations are set up and solved by applying orthogonal function expansion technique and effective truncation. Results clarified the influence on the dynamic stress concentration factor and magnetic field intensity concentration factor under proper conditions. Besides, the analytical solutions are compared with the finite element solutions to verify the accuracy of the conclusions in this article.
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SH 波下压磁半空间 V 型缺口的反平面应力分析
本文研究了压磁半空间中具有复杂边界条件的 V 型缺口的抗平面应力分析。首先,将 SH 波视为作用于压磁半空间的外部载荷,在重复图像叠加的基础上,进行散射波的解析表达,该解析表达满足半空间边界的边界条件。然后,通过分数贝塞尔函数展开法和格拉夫加法定理建立了驻波的解析表达式,它满足 V 型缺口边界上的无应力和磁绝缘条件。最后,应用格林函数法,沿垂直界面将半空间分为两部分,在垂直界面上施加一对平面内磁场和平面外力,建立第一类弗雷德霍姆积分方程,并应用正交函数展开技术和有效截断法求解。结果阐明了在适当条件下动态应力集中系数和磁场强度集中系数的影响。此外,还将分析解与有限元解进行了比较,以验证本文结论的准确性。
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