Stress Wave Propagation in 2D Functionally Graded Media: Optimization of Materials Distribution

Subject Areas : Mechanical Engineering

Parham Rajabi ¹ , Hossein Rahmani ² , Alireza Amiri ³

1 - Department of Mechanical Engineering, University of Sistan and Baluchestan, Zahedan, Iran
2 - Department of Mechanical Engineering, University of Sistan and Baluchestan, Zahedan, Iran
3 - Department of Mechanical Engineering, University of Sistan and Baluchestan, Zahedan, Iran

Received: 2020-09-05 Accepted : 2020-12-01 Published : 2021-06-01

Keywords: finite difference method, Genetic Algorithm, Functionally graded material, Optimization, Stress Wave Propagation,

Abstract :

In this paper, the analysis and optimization of the effect of the materials distribution on the behavior of 2D functionally graded media subjected to impacted loading has been investigated. First, it is assumed that there are two cases for distributing the components in the FG material. In the first case, the power law is considered for materials distribution, and in the second case, the volume fractional changes of the components are made by third degree interpolation. Considering the elastodynamic behavior of the FG materials under loading, the general governing equations of the wave propagation are extracted for the case of properties variation in two dimensions and then the equations are solved using the finite difference method. Finally, an optimization has been made using a single objective genetic algorithm. The results show that the materials distribution has a considerable effect of stress wave propagation in FGMs.

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