RAYLEIGH SURFACE WAVES IN A FUNCTIONALLY GRADED MATERIAL (FGM) INFINITE HALF SPACE
To investigate the propagation behavior of Rayleigh surface waves along the surface of a functionally graded material (FGM) half space, both coordinate transformation method and power series technique are employed for the asymptotic analytical derivations. By considering three basic FGM graded variation models, the propagation properties, including dispersion relations, mode analysis, attenuation tendency along depth, and characters of particles displacements trajectory are discussed. Results obtained indicate that coupled Rayleigh waves can propagate at the surface of an FGM half space, their dispersion relations, attenuation tendency and the direction of particles displacements motion at the free surface are dependent upon the graded variation tendency of the material parameters; there is not only one mode when the material bulk shear wave velocity increase along depth direction. These results may provide theoretical guidance for nondestructive evaluation (NDT) of FGM in engineering applications as well as the explanation of some seismic wave propagation phenomenon.
functionally graded material (fgm) rayleigh surface wave dispersion property
Xiaoshan Cao Feng Jin
Micro Optoelectronic Systems Labs, Xi an Technological University, No 4 North Jinhua Road,Xian 710 MOE Key Laboratory for Strength and Vibration, School of Aerospace, Xian Jiaotong University,Xian
国际会议
南京
英文
367-370
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）