T-stress analysis for a Griffith crack in a magnetoelectroelastic solid

T-stress analysis for a Griffith crack in a magnetoelectroelastic solid
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磁电弹性固体中格里菲斯裂纹的 T 应力分析

DOI:
10.1007/s00419-007-0143-z
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发表时间:
2008-02
影响因子:
2.8
通讯作者:
Li, Xian-Fang
Li, Xian-Fang
中科院分区:
工程技术4区
文献类型:
--
作者:
Zhong, Xian-Ci;Li, Xian-Fang

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t应力作为表征裂纹尖端周围应力场的一个重要参数受到了广泛的关注。本文研究了磁电弹性固体裂纹尖端附近的t应力。通过傅里叶变换,我们解决了相关的混合边值问题。采用与裂纹张开位移非线性相关的裂纹面电磁边界条件,推导了耦合对偶积分方程。然后,得到了t应力的闭型解。对裂纹磁电弹性固体和裂纹纯弹性材料的应力进行了比较。得到的结果表明,除了施加机械载荷外,真空裂纹的t应力还取决于电和磁载荷。
T-stress as an important parameter characterizing the stress field around a cracked tip has attracted much attention. This paper concerns theT-stress near a cracked tip in a magnetoelectroelastic solid. By applying the Fourier transform, we solve the associated mixed boundary-value problem. Adopting crack-faces electromagnetic boundary conditions nonlinearly dependent on the crack opening displacement, coupled dual integral equations are derived. Then, the closed-form solution for theT-stress is obtained. A comparison of theTstresses for a cracked magnetoelectroelastic solid and for a cracked purely elastic material is made. Obtained results reveal that in addition to applied mechanical loading, theT-stress is dependent on electric and magnetic loadings for a vacuum crack.
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