Static and vibration characteristics of thin-walled box beams: An experimental investigation

2017 ◽  
Vol 20 (10) ◽  
pp. 1540-1559 ◽  
Author(s):  
Kiana Kashefi ◽  
Abdul Hamid Sheikh ◽  
Michael C Griffith ◽  
MS Mohamed Ali ◽  
Kazuo Tateishi
Keyword(s):  
Three Dimensional ◽  
Time History ◽  
Displacement Transducer ◽  
Vibration Characteristics ◽  
Element Analysis ◽  
Linear Variable Displacement Transducer ◽  
Dimensional Finite Element ◽  
Box Beams ◽  
Thin Walled ◽  
Three Dimensional Finite Element

Static and vibration characteristics of thin-walled straight and curved box beams were investigated experimentally. Three different beam configurations were considered for the tests: one straight and two curved box beams. The load was applied at the centroid of the box section for the straight and one curved beam specimens. However, for the other curved specimen, the load was applied eccentrically to investigate its behavior under the additional torsion induced by the eccentricity. Displacements and strains were obtained using linear variable displacement transducer, one-directional and rosette strain gages. The specimens were excited using an impact at their free ends. The time history of strains was obtained to calculate natural frequencies and damping ratios. The experiment results were compared with those obtained from three-dimensional finite element analysis for all cases. The results obtained from implementing tests on the straight specimen were also used to validate an efficient numerical method recently developed by the authors.

Fire Durations of Concern for a Modern Legal Weight Truck Cask

2006 ◽  
Author(s):  
Neelima Mallidi ◽  
Miles Greiner ◽  
Venkata V. R. Venigalla
Keyword(s):  
Thermal Protection ◽  
Three Dimensional ◽  
Time History ◽  
Element Analysis ◽  
Pressurized Water ◽  
Dimensional Finite Element ◽  
Term Creep ◽  
Three Dimensional Finite Element ◽  
The Impact ◽  
Containment Integrity

The response of a truck package designed to transport four pressurized water reactor fuel assemblies to a simplified radiation fire model is simulated for a range of fire durations using three-dimensional finite element analysis. A model is developed to determine the cumulative seal degradation from its temperature versus time history. This model is used to determine the minimum fire duration that causes the seal to lose containment integrity. The fire durations that cause the maximum cladding temperature to reach its long term creep deformation and burst rupture temperatures are determined and found to be longer than the duration that cause the seal to lose containment integrity. These simulations are repeated for package models without the compliant regions of the impact limiters, and for a package with the impact limiter completely removed. These simulations quantify the level of thermal protection the impact limiters provide to the seals and cladding during simulated fires.

A Finite Element Analysis on Mechanical Property of Externally Strengthened Prestressed Box Beams

2011 ◽  
Vol 187 ◽  
pp. 790-796
Author(s):  
Rong Xia Wang ◽  
Hong Jiang Li
Keyword(s):  
Mechanical Property ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Concrete Strength ◽  
Three Dimensional ◽  
Analysis Model ◽  
Element Analysis ◽  
Dimensional Finite Element ◽  
Box Beams ◽  
Three Dimensional Finite Element

The mechanical property of external prestressed beams is affected by many parameters. Based on experimental study on externally strengthened prestressed box beams, a three-dimensional finite element analysis model was built in ANSYS. The calculation results was proved to be correct by being compared with experimental results. The effect of some parameters on deflection and stress in externally strengthened box beam was deeply analyzed in serviceability stage and ultimate status. The study shows that different original status of strengthened beam may affect the deflection and stress in different degree. The parameters change, such as effective prestress, concrete strength, the area and depth of external tendons and displacement coupling character for contact node, will result in a little difference in deflection and stress in serviceability stage, but obvious in ultimate status. For box beams in the model, changing the tendons lateral distance to the web results in litlle change in deflection and stress. No matter it is inside or outside the box at cross section.

Finite Element Analysis of Nonuniformity of Tires with Imperfections5

2007 ◽  
Vol 35 (3) ◽  
pp. 226-238 ◽  
Author(s):  
K. M. Jeong ◽  
K. W. Kim ◽  
H. G. Beom ◽  
J. U. Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Radial Force ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Dimensional Finite Element ◽  
Force Variation ◽  
Three Dimensional Finite Element

Abstract The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis. In order to evaluate tire uniformity, a three-dimensional finite element model of the tire with imperfections is developed. This paper considers how imperfections, such as variations in stiffness or geometry and run-out, contribute to detrimental effects on tire nonuniformity. It is found that the radial force variation of a tire with imperfections depends strongly on the geometrical variations of the tire.

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