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首页> 外文期刊>International Journal of Computational Materials Science and Surface Engineering >Mathematical modelling of steady state creep in a functionally graded rotating disc of variable thickness
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Mathematical modelling of steady state creep in a functionally graded rotating disc of variable thickness

机译：可变厚度的功能梯度转盘中稳态蠕变的数学模型

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摘要

A mathematical model has been developed to investigate steady state creep in a rotating disc having linearly varying thickness. The disc is assumed to be composed of functionally graded (FG) composite containing linearly varying content of silicon carbide particles (SiCp) reinforced in a matrix of pure aluminium (Al). The disc material undergoes steady state creep as described by a creep law based on threshold stress with a stress exponent of 5. The mathematical model developed has been employed to investigate the effect of imposing various linear gradients of SiCp on the creep performance of the FG disc. The study indicates that with the increase in SiCp gradient, the radial stress increases throughout the disc. However, the increase in SiCp gradient results in increase of tangential and effective stresses near the inner radius of the disc but a decrease near the outer radius The tangential as well as radial strain rates in the FG disc reduce to a significant extent with the increase in SiCp gradient.
机译：已经开发出数学模型来研究具有线性变化厚度的旋转盘中的稳态蠕变。假定该光盘由功能梯度（FG）复合材料组成，该复合材料包含线性变化含量的纯铝（Al）基质中增强的碳化硅颗粒（SiCp）。圆盘材料会经历稳态蠕变，该蠕变由基于应力指数为5的阈值应力的蠕变定律描述。已开发的数学模型已用于研究对SiCp施加各种线性梯度对FG圆盘蠕变性能的影响。研究表明，随着SiCp梯度的增加，整个圆盘的径向应力都会增加。但是，SiCp梯度的增加会导致圆盘内半径附近的切向应力和有效应力增加，而外圆半径附近的切应力却减小。FG圆盘中的切向应力和径向应变率会随着圆盘内半径的增加而显着降低。 SiCp梯度。

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