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Conditions of stress-free deformation of anisotropic FGM interface under constant temperature

机译:恒温下各向异性FGM界面无应力变形的条件

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This article demonstrates conditions of stress-free deformation of anisotropic FGM interface under thermal loading. Existence of such a deformation is theoretically possible in the case of constant temperature, reduction of the covariant differential along direction of functional gradation to the partial differential, and simultaneously the linear gradation of thermal expansion tensor. Nevertheless, two examples of engineering structures, a thick three-layer plate and a thick-walled cylinder, show that either the compatible deformation of three-layer structure or an application of the curvilinear interface results in stress state appearance. Both examples under consideration take the advantage of an alumina-based composite Al-Al2O3, the thermomechanical properties of which are subjected to transverse isotropy.
机译:本文演示了在热载荷下各向异性FGM界面无应力变形的条件。从理论上讲,在恒定温度,协变微分沿功能梯度方向减小到部分微分以及同时使热膨胀张量呈线性梯度的情况下,这种变形的存在是可能的。尽管如此,工程结构的两个示例(厚的三层板和厚壁的圆柱体)表明,三层结构的兼容变形或曲线界面的应用都会导致应力状态出现。所考虑的两个示例都利用了基于氧化铝的复合材料Al-Al2O3,其热机械性能受到横向各向同性的影响。

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