【摘 要】
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Background, Motivation and Objective Functionally graded materials (FGM) are heterogeneous media, in which the mechanical parameters are functions of the distance from the surface into the bulk of the
【机 构】
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Polish Academy of Sciences, Poland
论文部分内容阅读
Background, Motivation and Objective Functionally graded materials (FGM) are heterogeneous media, in which the mechanical parameters are functions of the distance from the surface into the bulk of the material. FGMs can provide elevated mechanical properties (e.g., high strength and hardness) and superior exploitation characteristics (e.g., crack, wear and corrosion resistance). Love waves may be used to study spatial profiles changes in mechanical properties (e.g., modulus of elasticity) of FGMs. Love wave penetration depth depends on the frequency. Thus, by changing the frequency of the wave one can probe subsurface profiles of materials. Love wave energy is concentrated near the surface of the waveguide. For this reason, any disturbance in the material parameters in the surface region have considerable impact on the dispersion characteristics of the Love wave (i.e., velocity and attenuation). Therefore, the Love waves are particularly convenient to study the physical properties of inhomogeneous graded materials. Conventional methods for investigation the elastic properties of FGM are destructive methods. By contrast, Love wave method used to investigate the elastic properties of the FGM is a nondestructive method.
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