Nonlinear Analysis and Construction Method of a Silo Dome with Grain

2014 ◽  
Vol 501-504 ◽  
pp. 2213-2216
Author(s):  
Jian Wan
Keyword(s):  
Nonlinear Analysis ◽  
Buckling Analysis ◽  
Nonlinear Buckling ◽  
Roof Structure ◽  
Shell Design ◽  
Linear Buckling ◽  
New Type ◽  
Buckling Failure ◽  
Nonlinear Buckling Analysis ◽  
Linear Buckling Analysis

Combined with the project which a grain silo need be transformed, a new type of silo is put forward. The silo system consists of supporting columns, the silo body and latticed shell roof structure. In view of the force is different between silo shell roof and conventional roof, and silo shell roof prones to buckling failure. The linear and nonlinear buckling analysis was carried out for latticed shell with a diameter of 20m, the results show that the buckling loads obtained by linear buckling analysis is greater than that obtained by nonlinear buckling analysis, and nonlinear analysis is more secure for structures. Through the comparison the rationality and stability of reticulated shell design are verified, finally construction measures of this system are given, and these can provide references for design and construction of similar engineering.

Linear Buckling Analysis Considering No-compression Property of Metal Grid Shells Stiffened by Tension Braces

2021 ◽  
Vol 62 (3) ◽  
pp. 195-205
Author(s):  
Kenji Yamamoto ◽  
Hayato Utebi
Keyword(s):  
Geometrical Nonlinearity ◽  
Buckling Analysis ◽  
Nonlinear Buckling ◽  
Compression Property ◽  
Buckling Behavior ◽  
Metal Grid ◽  
Linear Buckling ◽  
Nonlinear Buckling Analysis ◽  
Linear Buckling Analysis ◽  
Lattice Shells

In order to analyze the buckling behavior of lattice shells stiffened by cables or slender braces without pre-tension, it is necessary to consider the no-compression property of braces. This paper proposes an innovative method of linear buckling analysis that considers the no-compression property of braces. Moreover, in order to examine the proposed method's validity, its results are compared with the results from a nonlinear buckling analysis with geometrical nonlinearity and material nonlinearity to express the no-compression property of braces. The results show that the proposed method can well-predict the buckling behaviors of lattice shells stiffened by tension braces.

Nonlinear Buckling Analysis of Cylindrical Shell With Normal Nozzle Subjected to Axial Loads

2017 ◽  
Author(s):  
Qianyu Shi ◽  
Zhijian Wang ◽  
Hui Tang
Keyword(s):  
Cylindrical Shell ◽  
Industrial Development ◽  
Large Scale ◽  
Pressure Vessels ◽  
Buckling Analysis ◽  
Fe Model ◽  
Axial Loads ◽  
Nonlinear Buckling ◽  
Buckling Failure ◽  
Nonlinear Buckling Analysis

Design of Large-scale and light-weight pressure vessels is an inexorable trend of industrial development. These large thin-walled vessels are prone to buckling failure when subjected to compression loads and other destabilizing loads. Thus, buckling analysis is a primary and even the most important part of design for these pressure vessels. Local buckling failure will probably occur when cylindrical shells with nozzle subjected to axial loads. In this paper, a FE model of cylindrical shell with a normal nozzle is established in ANSYS Workbench. The bifurcation buckling analysis is performed by using an elastic-plastic stress analysis with the effect of nonlinear geometry, and a collapse analysis is performed with an initial imperfection. The axial buckling loads are obtained by these two types of method. Some issues about nonlinear buckling analysis are discussed through this study case.

scholarly journals Linear Buckling Analysis of Landing Gear

2019 ◽  
Vol 8 (6) ◽  
pp. 2365-2368
Keyword(s):  
Impact Load ◽  
Landing Gear ◽  
Buckling Analysis ◽  
The Body ◽  
Large Magnitude ◽  
Critical System ◽  
Mode Of Failure ◽  
Linear Buckling ◽  
Buckling Failure ◽  
Linear Buckling Analysis

In an aircraft the landing gear is the most critical system which acts as suspension during landing and take-off. During this, it experiences very large magnitude of impact load which is mostly compressive in nature. Hence, a major concern in this structure is buckling failure. Buckling is a mode of failure in which compressive forces act along the axis of the component. Buckling can cause catastrophic deformation of the component for slight increase in load acting on the body. Many a time buckling is the deciding factor for allowable stress. So, the buckling strength of the material used for landing gear should be sufficiently high enough to resist failure. Good corrosion resistance and low density makes Ti-6Al-4V (also called TC4) the most commonly used material for the landing gear. This paper deals with linear buckling analysis of landing gear and compares the result of three titanium alloys (TC4, Ti-7Al-4Mo, TIMETAL 834) for landing gear. The landing gear assembly is designed in CREO 3.0 and linear buckling analysis is performed in ANSYS 19.2

Parametric Modeling and Stability Analysis of Temporary Grandstand

2014 ◽  
Vol 578-579 ◽  
pp. 907-916 ◽  
Author(s):  
Lin He ◽  
Cong Liu ◽  
Zhen Yu Wu
Keyword(s):  
Bearing Capacity ◽  
Three Dimensional ◽  
Ultimate Bearing Capacity ◽  
Parametric Modeling ◽  
Buckling Analysis ◽  
Structural Deformation ◽  
Buckling Mode ◽  
Nonlinear Buckling ◽  
Linear Buckling ◽  
Linear Buckling Analysis

Temporary grandstands bear crowd load, which is created when spectators jumping on the structure. The simplified loads applied to temporary grandstand have been obtained based on experiment data of human body jumping forces. By the ABAQUS software, the parametric and automatic modeling of three-dimensional (3D) temporary grandstand structures has been realized with Python scripting. The linear buckling analysis and nonlinear buckling analysis of the structure have been carried out. The ultimate bearing capacity and the structural deformation under crowd load have been acquired. Results show that the nonlinear effect of the structure under crowd load is very obvious; the linear buckling analysis cannot get the ultimate bearing capacity of the structure and the first order buckling mode cannot simulate the final deformation of the structure either. The research of this paper greatly improve the efficiency of the construction and automation design of temporary structures and reveal the mechanical behavior of such structure to a certain degree.

scholarly journals Non-linear buckling analysis of functionally graded shallow spherical shells

2009 ◽  
Vol 31 (1) ◽  
pp. 17-30 ◽  
Author(s):  
Dao Huy Bich
Keyword(s):  
External Pressure ◽  
Buckling Analysis ◽  
Functionally Graded ◽  
Power Law Distribution ◽  
Governing Equations ◽  
Spherical Shells ◽  
Buckling Loads ◽  
Linear Buckling ◽  
Non Linear ◽  
Linear Buckling Analysis

In the present paper the non-linear buckling analysis of functionally graded spherical shells subjected to external pressure is investigated. The material properties are graded in the thickness direction according to the power-law distribution in terms of volume fractions of the constituents of the material. In the formulation of governing equations geometric non-linearity in all strain-displacement relations of the shell is considered. Using Bubnov-Galerkin's method to solve the problem an approximated analytical expression of non-linear buckling loads of functionally graded spherical shells is obtained, that allows easily to investigate stability behaviors of the shell.

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