کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6778184 1432067 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Postbuckling of functionally graded graphene-reinforced composite laminated cylindrical shells subjected to external pressure in thermal environments
ترجمه فارسی عنوان
پس از اتمام شونده های استوانه ای لمینت تقویت شده با گرافن عملکردی تحت فشار خارجی در محیط های حرارتی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
The current investigation deals with the buckling and postbuckling behaviors of graphene-reinforced composite (GRC) laminated cylindrical shells subjected to lateral or hydrostatic pressure under thermal environmental conditions. The piece-wise GRC layers are arranged in a functionally graded (FG) pattern along the thickness direction of the shells. The temperature dependent material properties of GRCs are estimated by the extended Halpin-Tsai micromechanical model with graphene efficiency parameters being calibrated against the GRC material properties from a molecular dynamics simulation study. We employ the Reddy's higher order shear deformable shell theory in association with the von Kármán geometric nonlinearity to model the shell buckling problem under different thermal environmental conditions. The buckling pressure and the postbuckling equilibrium path for the perfect and geometrically imperfect GRC laminated cylindrical shells are obtained by applying a singular perturbation technique along with a two-step perturbation approach. We observe that the piece-wise functionally graded distribution of graphene reinforcement can increase the buckling pressure and the postbuckling strength of the GRC laminated cylindrical shells subjected to external pressure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin-Walled Structures - Volume 124, March 2018, Pages 151-160
نویسندگان
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