An analysis of surface acoustic wave propagation in a plate of functionally graded materials with a layered model

• 来源期刊: 中国科学G辑（英文版）
• 年，卷（期）: 2008,（2）
• 页码范围: 165-175
• 页数: 11页
• 语种: 英文
• DOI: 10.1007/s 11433-008-0022-9

摘要

In a homogeneous plate, Rayleigh waves will have a symmetric and anti-symmetric mode regarding to the mid-plane with different phase velocities. If plate properties vary along the thickness, or the plate is of functionally graded material (FGM), the symmetry of modes and frequency behavior will be modified, thus producing dif-ferent features for engineering applications such as amplifying or reducing the velocity and deformation. This kind of effect can also be easily realized by utilizing a layered structure with desired material properties that can produce these effects in terms of velocity and displacements, since Rayleigh waves in a solid with gen-eral material property grading schemes are difficult to analyze with known methods. Solutions from layered structures with exponential and polynomial property grad-ing schemes are obtained from the layered model and comparisons with known analytical results are made to validate the method and examine possible applica-tions of such structures in engineering.