Abstract

Primary (unsteady) and secondary (steady) regimes of creep deformation of a rotating disk made of an Al–SiC functionally graded material (FGM) is investigated using the generalized differential quadrature (GDQ) method. The disk is subjected to three different types of the temperature gradient in the radial direction, and a temperature dependence of the material properties is assumed. The primary and secondary creep is described by Norton’s law in which the creep parameters depend on the volume fraction distribution of SiC reinforcement particles, temperature, and particle size. It is shown that the creep rates are strongly dependent on the temperature gradient type, prevailing temperature, and content of reinforcing particles at any point of the disk.

中文翻译：

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旋转温度依赖的FGM盘中非稳态蠕变的GDQ分析

摘要

使用广义微分正交（GDQ）方法研究了由Al-SiC功能梯度材料（FGM）制成的转盘的蠕变变形的初级（非稳态）和次级（稳态）状态。盘在径向上经受三种不同类型的温度梯度，并且假定材料特性的温度依赖性。一次和二次蠕变由诺顿定律描述，其中蠕变参数取决于SiC增强颗粒的体积分数分布，温度和粒径。结果表明，蠕变速率在很大程度上取决于温度梯度类型，主要温度以及在圆盘任何一点处的增强颗粒含量。