Hương Sơn ngoạn mục

Title: Hương Sơn ngoạn mục
Authors: Văn Tuế
Keywords: Tôn giáo
Phật giáo
Danh lam thắng cảnh
Issue Date: 1999
Publisher: Viện nghiên cứu Phật học Việt Nam
Description: Tạp chí nghiên cứu Phật học - Số 1/1999 ; 5 tr. ; TNS08547
URI: http://repository.vnu.edu.vn/handle/VNU_123/54710
Appears in Collections:Nghiên cứu Phật học và Phật hoàng Trần Nhân Tông (LIC)

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Torsional buckling and post-buckling behavior of eccentrically stiffened functionally graded toroidal shell segments surrounded by an elastic medium

The nonlinear buckling and post-buckling problems of functionally graded stiffened toroidal shell segments surrounded by an elastic medium under torsion based on an analytical approach are investigated. The rings and stringers are attached to the shell, and material properties of the shell are assumed to be continuously graded in the thickness direction. The classical shell theory with the geometrical nonlinearity in von Kármán sense and the smeared stiffeners technique are applied to establish theoretical formulations. The three-term approximate solution of deflection is chosen more correctly, and the explicit expression to find critical load and post-buckling torsional load-deflection curves is given. The effects of geometrical parameters and the effectiveness of stiffeners on the stability of the shell are investigated. Title:  Torsional buckling and post-buckling behavior of eccentrically stiffened functionally graded toroidal shell segments surrounded by an elas...
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Bedeutungswandel in der deutschen spracheam beispiel der modalverben = Biến đổi nghĩa trong tiếng Đức dựa trên ví dụ của động từ tình thái. Luận văn ThS. Ngôn ngữ học: 60 22 02 05

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Nonlinear buckling of higher deformable S-FGM thick circular cylindrical shells with metal-ceramic-metal layers surrounded on elastic foundations in thermal environment

An analytical approach on the nonlinear response of thick functionally graded circular cylindrical shells with temperature independent material property surrounded on elastic foundations subjected to mechanical and thermal loads is presented. Material properties are graded in the thickness direction according to a Sigmoid power law distribution in terms of the volume fractions of constituents (S-FGM). The formulations are based on the third order shear deformation shell theory taking into account von Karman nonlinearity, initial geometrical imperfection and Pasternak type elastic foundation. By applying Galerkin method and using stress function, explicit relations of thermal load-deflection curves of the S-FGM shells are determined. Detailed parametric studies are carried out to investigate effects of volume fraction index, material properties and geometrical shapes, axial compressions and thermal load, foundation stiffness and imperfection on nonlinear buckling behaviors ...
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