热机械载荷作用下多孔功能梯度转盘的极限角速度分析

IF 1.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Royal Madan, Shubhankar Bhowmick, L. Hadji, A. Alnujaie
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引用次数: 3

摘要

目的通过对功能梯度多孔旋转圆盘(PFGM)在热机械载荷作用下的极限弹性速度分析,研究了孔隙率体积分数、孔隙率类型、材料分级指数、可变圆盘轮廓和纵横比对圆盘性能的影响。设计/方法/方法通过使用幂律函数来改变成分变化。根据混合物的密度和热膨胀系数的修正规则,估算了PFGM的热机械性能,如杨氏模量和屈服强度。将圆盘中孔隙率的均匀和不均匀分布视为均匀、对称、内最大值和外最大值。然后利用变分原理和伽辽金误差最小化理论对该问题进行了求解。研究表明,与纵横比相比,级配参数、圆盘几何形状和孔隙率分布对极限弹性速度有显著影响。实际意义该研究确定了多孔和非多孔圆盘剖面的一系列可操作速度,工业界可以利用这些速度来估计结构性能。原创性/价值进行了有限元调查,以验证本研究的结果。多孔FG圆盘在热-机械载荷作用下的极限弹性分析以前没有进行过研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Limit angular speed analysis of porous functionally graded rotating disk under thermo-mechanical loading
PurposeIn this work, the effect of porosity volume fraction, porosity types, material grading index, variable disk profiles and aspect ratio on disk performance was studied by performing limit elastic speed analysis of functionally graded porous rotating disks (PFGM) under thermo-mechanical loading.Design/methodology/approachThe composition change was varied by employing the power law function. The thermo-mechanical properties of PFGM such as Young's modulus and yield strength were estimated using modified rule of mixture, for density and coefficient of thermal expansion rule of mixture was used. The even and uneven distribution of porosity in a disk was taken as uniform, symmetrical, inner maximum and outer maximum. The problem was then solved with the help of the variational principle and Galerkin's error minimization theory.FindingsThe research reveals that the grading parameter, disk geometry and porosity distribution have a significant impact on the limit elastic speed in comparison to the aspect ratio.Practical implicationsThe study determines a range of operable speeds for porous and non-porous disk profiles that the industry can utilize to estimate structural performance.Originality/valueA finite element investigation was conducted to validate the findings of the present study. Limit elastic analysis of porous FG disks under thermo-mechanical loading has not been studied before.
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来源期刊
CiteScore
3.70
自引率
5.00%
发文量
60
期刊介绍: Multidiscipline Modeling in Materials and Structures is published by Emerald Group Publishing Limited from 2010
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