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首页> 外文期刊>Journal of thermal stresses >Dynamic analysis of cracks under thermal shock considering thermoelasticity without energy dissipation
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Dynamic analysis of cracks under thermal shock considering thermoelasticity without energy dissipation

机译：考虑热弹性而无耗能的热冲击裂纹动态分析

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This article reports a study of a cracked finite isotropic medium under nonclassic thermal shock based on thermoelasticity without energy dissipation. The time history of stress intensity factors as well as the temperature distribution around the crack tip is analyzed thoroughly. The fully coupled governing equations are discretized in the space by employing the extended finite-element method. The Newmark method is used as the time integration scheme to solve discretized equations. The stress intensity factors, which are extracted using the interaction integral method, are compared with other theories of thermoelasticity. The results of a cracked plate under temperature shock demonstrate that the stress intensity factors based on thermoelasticity without energy dissipation are significantly greater than those based on classic and Lord-Shulman models, whereas the peaks of stress intensity factors under heat flux shock are nearly equal for various theories of thermoelasticity. Furthermore, a mobile cold region is created along slanted crack in the temperature distribution, in which the temperature is less than the applied thermal boundary condition.
机译：本文报道了基于热弹性且无能量耗散的非经典热冲击下裂纹有限各向同性介质的研究。全面分析了应力强度因子的时间历程以及裂纹尖端周围的温度分布。通过使用扩展的有限元方法，完全耦合的控制方程在空间中离散。 Newmark方法用作时间积分方案来求解离散方程。使用相互作用积分法提取的应力强度因子与其他热弹性理论进行了比较。在温度冲击下破裂的板的结果表明，基于热弹性的无能量耗散的应力强度因子明显大于基于经典模型和Lord-Shulman模型的应力强度因子，而在热通量冲击下，应力强度因子的峰值几乎相等。各种热弹性理论。此外，沿着温度分布中的倾斜裂纹创建了一个可移动的寒冷区域，其中温度低于所施加的热边界条件。

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