نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه یاسوج، دانشکده مهندسی، گروه مهندسی مکانیک
2 دانشگاه شیراز، دانشکده مهندسی، گروه مهندسی مکانیک
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In the present research, vibration behavior is presented for a thermally postbuckled double layered graphene sheet (DLGS). The DLGS is modeled as a nonlocal orthotropic plate which contains small scale effects. The formulations are based on the Kirchhoff's plate theory, and von Karman-type nonlinearity is considered in strain-displacement relations. The thermal effects, van der Waals forces between layers and chirality are also included and the material properties are assumed to be temperature-dependent. A semi analytical solution is obtained using multiple time scales method. The effects of variation of small scale parameter to the natural frequencies, deflections and response curve of DLGS are analyzed and the numerical results are obtained from the nonlocal plate model. Numerical results are compared with those of similar researches. Effects of various parameters on the postbuckled vibration of DLGS in thermal environments such as scale parameter, length and thermal load are presented. Stability of vibration modes around a buckled configuration is investigated. Results show that the scale parameter and thermal changes have important roles on nonlinear vibrational behavior of nano scale buckled structures.
کلیدواژهها [English]
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