Nghiên cứu độ oằn phi tuyến của các vỏ vỏ hình cầu vành khuyên mỏng FGM dưới tải trọng cơ học và trạng thái tĩnh trên nền đàn hồi

• Ngôn ngữ: vie
• Ký hiệu phân loại: 620.1 Engineering mechanics and materials
• Thông tin xuất bản: Vietnam Journal of Mechanics, 2014
• Mô tả vật lý: 291-306
• Bộ sưu tập: Metadata
• ID: 506664

Tóm tắt

This paper presents an analytical approach to investigate the nonlinear buckling and post-buckling of thin annular spherical shells made of functionally graded materials (FGM) and subjected to mechanical load and resting on Winkler-Pasternak type elastic foundations. Material properties are graded in the thickness direction according to a simple power law distribution in terms of the volume fractions of constituents. Equilibrium and compatibility equations for annular spherical shells are derived by using the classical thin shell theory in terms of the shell deflection and the stress function. Approximate analytical solutions are assumed to satisfy simply supported boundary conditions and Galerkin method is applied to obtain closed-form of load-deflection paths. An analysis is carried out to show the effects of material and geometrical properties and combination of loads on the stability of the annular spherical shells.