کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
252482 502966 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Guided waves in functionally graded viscoelastic plates
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Guided waves in functionally graded viscoelastic plates
چکیده انگلیسی

In this paper, a dynamic solution for the propagating viscoelastic waves in functionally graded material (FGM) plates subjected to stress-free conditions is presented in the context of the Kelvin–Voigt viscoelastic theory. The FGM plate is composed of two orthotropic materials. The material properties are assumed to vary in the thickness direction according to a known variation law. The three obtained wave equations are divided into two groups, which control viscoelastic Lamb-like wave and viscoelastic SH wave, respectively. They are solved respectively by the Legendre orthogonal polynomial series approach. The validity of the method is confirmed through a comparison with the Lamb wave solution of a pure elastic FGM plate and a comparison with the SH wave solution of a viscoelastic homogeneous plate. The dispersion curves and attenuation curves for the graded and homogeneous viscoelastic plates are calculated to highlight their differences. The viscous effect on dispersion curves is shown. The influences of gradient variations are illustrated.


► Viscous effect on the dispersion curves mainly occurs at lower frequencies.
► Viscous effect on dispersion often occurs mainly only on quasi-longitudinal waves.
► The gradient shape has influences on both dispersion and attenuation curves.
► Attenuation curves in graded plates are more dispersive and kinkier.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composite Structures - Volume 93, Issue 11, October 2011, Pages 2671–2677
نویسندگان
, , ,