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首页> 外文期刊>Composites: mechanics, computations, applications >ANALYSIS OF STEADY-STATE CREEP IN A FUNCTIONALLY GRADED ROTATING DISC OF VARIABLE THICKNESS
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ANALYSIS OF STEADY-STATE CREEP IN A FUNCTIONALLY GRADED ROTATING DISC OF VARIABLE THICKNESS

机译：可变厚度的功能梯度旋转圆盘中的稳态蠕变分析

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摘要

The article presents an analysis of steady-state creep in a variable-thickness rotating disc made of functionally graded composite containing linear and nonlinear distributions of silicon carbide particles in an aluminum matrix. The composite is assumed to creep according to a threshold stress-based law. The stresses and strain rates have been calculated in the FGM discs as well as in a similar composite disc but having uniform distribution of reinforcement. The presence of a linear or nonlinear reinforcement gradient in the composite disc leads to an increase in the radial stress over the entire disc radius, however, the tangential and effective stresses increase significantly near the inner radius but decrease towards the outer radius. A nonlinear FGM disc exhibits a relatively higher amount of increase or decrease in stresses than a linear FGM or uniform disc. The magnitudes of tangential and radial strain rates in FGM discs are significantly lower than in a uniform composite disc. An FGM disc, having nonlinear distribution of reinforcement, possess the lowest and relatively uniform distribution of strain rates, thereby, it is susceptible to lesser distortion.
机译：这篇文章介绍了由功能梯度复合材料制成的可变厚度旋转盘中稳态蠕变的分析，该复合材料包含铝基质中碳化硅颗粒的线性和非线性分布。假定复合材料根据基于阈值应力的定律蠕变。已经在FGM圆盘以及类似的复合材料圆盘中计算了应力和应变率，但钢筋分布均匀。复合圆盘中线性或非线性增强梯度的存在会导致整个圆盘半径上的径向应力增加，但是，切线应力和有效应力在内半径附近显着增加，而朝外半径减小。与线性FGM或均匀盘相比，非线性FGM盘显示出相对较高的应力增加或减小量。 FGM圆盘的切向和径向应变率的幅度明显低于均匀复合圆盘。具有钢筋的非线性分布的FGM圆盘具有最低且相对均匀的应变率分布，因此，其变形较小。

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