Abstract
Functionally graded material is a new class of composite materials with gradually varying material contents. In this article, a two-dimensional axisymmetric time-domain spectral finite element meth...
Highlights
Graded material (FGM) is a new kind of composite materials with gradually varying material properties tailored to specific applications
It can be seen that after the load is applied to the top surface of the functionally graded (FG) cylinder, the longitudinal and transverse waves are produced in the cylinder
The time-domain spectral finite element method (SFEM) based on the high-order interpolation functions and the GLL node collocation and integration is attractive because it can avoid Runge’s phenomenon and needs lower computational costs compared to the conventional finite element method
Summary
Graded material (FGM) is a new kind of composite materials with gradually varying material properties tailored to specific applications. Compared with the common layered composite material, one of the superior properties of FGM is that the continuous gradation in material content can overcome the interfacial problem arisen from sudden change in material properties at the interfaces of different phases.[1] FGMs have been increasingly used in aerospace, nuclear, automotive and defense industries In many of these applications, FGM structures usually serve as critical parts in the whole assemble. To effectively detect damages in FGM structures which is critical to enable system reliability and safety, many damage detection methods have been proposed in recent years, such as vibration-based methods, and ultrasonic-based methods. Among these current methods, the guided wave damage detection method has attracted much attention
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