Small-Scaled Experimental Research on the Buckling of Steel Containment Under Axial Compression

2017 ◽  
Author(s):  
Pengfei Li ◽  
Fuquan Hu ◽  
Xuwei Wang ◽  
Zheng He ◽  
Zhi Gang
Keyword(s):  
Finite Element Method ◽  
Reference Value ◽  
Fem Analysis ◽  
Nonlinear Finite Element ◽  
Geometrical Parameters ◽  
Nonlinear Finite Element Method ◽  
Arc Length ◽  
Axial Pressure ◽  
Elastoplastic Constitutive Model ◽  
Shape Imperfection

Focusing on the general and localized elastoplastic buckling of the cylindrical section of steel containment under axial pressure, nonlinear finite element method (FEM) and small-scaled experiments are applied to analysis. First, FEM analysis is conducted considering nonlinear items caused by geometric shape imperfection and elastoplastic constitutive model by the arc-length method RIKS procedure. Parameter sensitivity of the buckling is revealed. Then, small-scaled experiments are carried out. Buckles status is observed, and key geometrical parameters’ influence are found. The results show that cylindrical buckling under axial pressure is sensitive to geometrical parameters and imperfection. It is necessary to employ more realistic parameters to the FEM analysis via accurate geometrical measurement. This research has reference value for the design and fabrication of AP series steel containment vessel.

Effect Factors Study on Ultimate Strength of Aluminum Stiffened Plates under Cyclic Loading

2014 ◽  
Vol 904 ◽  
pp. 132-136
Author(s):  
Hu Wei Cui ◽  
Ping Yang ◽  
Liang Zhou ◽  
Can Shen ◽  
Xiao Jing Chen
Keyword(s):  
Finite Element Method ◽  
Cyclic Loading ◽  
Ultimate Strength ◽  
Reference Value ◽  
Nonlinear Finite Element ◽  
Stiffened Plates ◽  
Nonlinear Finite Element Method ◽  
Effect Factors ◽  
Distribution Mode ◽  
Design And Manufacture

Nonlinear finite element method is used in this paper to research the ultimate strength characteristics of aluminum stiffened plates under uniaxial tension-compression cyclic loading. This paper focused on the effect of the distribution mode of HAZ, the range of HAZ and different cyclic loading process on the ultimate strength of aluminum stiffened plates. The results obtained have a certain reference value to the design and manufacture of aluminum stiffened plates.

Study on Antiseismic Measures of Tailings Dam

2011 ◽  
Vol 90-93 ◽  
pp. 44-47
Author(s):  
Jian Ping Pan ◽  
Sheng Yi Wang ◽  
Shui Tai Xu
Keyword(s):  
Finite Element Method ◽  
Rock Pressure ◽  
Deformation Characteristic ◽  
Nonlinear Finite Element ◽  
Stone Column ◽  
Tailings Dam ◽  
Nonlinear Finite Element Method ◽  
Reinforcement Effect ◽  
Earthquake Action ◽  
Seismic Deformation

Tailings dam due to earthquake action may lead to severe slippage damage, and setting antiseismic measure is an effective method to prevent damage. Dynamic nonlinear finite element method is used in the efforts to analyze the earthquake reaction and the deformation characteristic. To reduce dam seismic deformation, the reinforcement effect of geotextiles, rock pressure and stone column is studied. Finally, a synthetically antiseismic measure that is composed of geotextiles-reinforced in sub-dam, rock pressure out of starter dam and densification foundation is proposed. It is found that the synthetically antiseismic measure produces better antiseismic effect, and offers a consult for the antiseismic design of tailings dam.

Relevance of Mesh Dimension Optimization, Geometry Simplification and Discretization Accuracy in the Study of Mechanical Behaviour of Bare Metal Stents

2011 ◽  
Vol 2 (1) ◽  
pp. 1-15
Author(s):  
Mariacristina Gagliardi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Degrees Of Freedom ◽  
Bare Metal Stents ◽  
Nonlinear Finite Element ◽  
Metal Stents ◽  
Bare Metal ◽  
Nonlinear Finite Element Method ◽  
Convergence Test ◽  
Geometry Simplification

In this paper, the authors propose a set of analyses on the deployment of coronary stents by using a nonlinear finite element method. The goal is to propose a convergence test able to select the appropriate mesh dimension and a methodology to perform the simplification of structures composed of cyclically repeated units to reduce the number of degrees of freedom and the analysis run time. A systematic study, based on the analysis of seven meshes for each model, was performed, gradually reducing the element dimension. In addition, geometric models were simplified considering symmetries; adequate boundary conditions were applied and verified based on the results obtained from the analysis of the whole model.

Cause Analysis on the Cracks in Concrete Plate of Canal Lining

2013 ◽  
Vol 405-408 ◽  
pp. 2596-2599 ◽  
Author(s):  
Jian Hua Cui ◽  
Zhi Qiang Xie ◽  
Han Jiang Xiao
Keyword(s):  
Finite Element Method ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
Foundation Soil ◽  
Cause Analysis ◽  
Construction Period ◽  
Concrete Plate ◽  
Operation Period ◽  
External Loads

Concrete cracks often appear in construction period and operation period of the canal lining. For analyzing the cause of these cracks, the factors which will cause cracks are classified based on the data collected. Also sensitivity analysis on these factors is carried out with 3D contact nonlinear finite element method. The result shows that, the factors which resulting in concrete cracks are temperature variation, humidity, uneven settlement of foundation, expansion deformation of foundation soil, external loads etc.; Joint-cutting should be done as soon as possible, expansive property of the foundation soil and construction quality of canal lining should be strictly controlled.

Performance Evaluation of Spring for the Vehicle Suspension System Using the Nonlinear Finite Element Method

2014 ◽  
Vol 635-637 ◽  
pp. 594-597
Author(s):  
Byeong Soo Kim ◽  
Byung Young Moon ◽  
Sung Kwan Kim
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Composite Material ◽  
Suspension System ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
Air Spring ◽  
Rubber Sleeve ◽  
The Impact ◽  
Element Method

Air spring is used for the suspension system and it affects the vehicle stability and riding comfort by improving the impact-relief, braking, and cornering performance. Air Spring is comprised of the upper plate, lower plate, and rubber sleeve. Rubber sleeve is the composite material, which is made up of combination of rubber and Nylon, and the characteristics are changed according to the shape of rubber-sleeve, the angle of reinforcement cord. In this study, the distribution of internal stresses and the deformation of rubber composite material are analyzed through the nonlinear finite element method. The result showed that the internal maximum stresses and deformations about the changes of cord angle caused the more the Young's modulus decrease, the more maximum stress reduced.

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