Seismic assessment of an industrial frame structure designed according to Eurocodes. Part 1: Experimental tests and their numerical simulation

2005 ◽  
Vol 27 (5) ◽  
pp. 709-723 ◽  
Author(s):  
S.L. Dimova ◽  
P. Negro
Keyword(s):  
Numerical Simulation ◽  
Experimental Tests ◽  
Seismic Assessment ◽  
Frame Structure

scholarly journals Numerical simulation of gas-solid flow in an interconnected fluidized bed

2015 ◽  
Vol 19 (1) ◽  
pp. 317-328 ◽  
Author(s):  
Giuseppe Canneto ◽  
Cesare Freda ◽  
Giacobbe Braccio
Keyword(s):  
Numerical Simulation ◽  
Fluidized Bed ◽  
Experimental Tests ◽  
Solid Particles ◽  
Multiphase Model ◽  
Cold Model ◽  
Conservation Equations ◽  
Solid Flow

The gas-particles flow in an interconnected bubbling fluidized cold model is simulated using a commercial CFD package by Ansys. Conservation equations of mass and momentum are solved using the Eulerian granular multiphase model. Bubbles formation and their paths are analyzed to investigate the behaviour of the bed at different gas velocities. Experimental tests, carried out by the cold model, are compared with simulation runs to study the fluidization quality and to estimate the circulation of solid particles in the bed.

scholarly journals Cold Expansion Process with Multiple Balls—Numerical Simulation and Comparison with Single Ball and Tapered Mandrels

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5536
Author(s):  
David Curto-Cárdenas ◽  
Jose Calaf-Chica ◽  
Pedro Miguel Bravo Díez ◽  
Mónica Preciado Calzada ◽  
Maria-Jose Garcia-Tarrago
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Fatigue Life ◽  
Experimental Tests ◽  
The Finite Element Method ◽  
Expansion Process ◽  
Cold Expansion ◽  
Hoop Stresses ◽  
Element Method

Cold expansion technology is an extended method used in aeronautics to increase fatigue life of holes and hence extending inspection intervals. During the cold expansion process, a mechanical mandrel is forced to pass along the hole generating compressive residual hoop stresses. The most widely accepted geometry for this mandrel is the tapered one and simpler options like balls have generally been rejected based on the non-conforming residual hoop stresses derived from their use. In this investigation a novelty process using multiple balls with incremental interference, instead of a single one, was simulated. Experimental tests were performed to validate the finite element method (FEM) models and residual hoop stresses from multiple balls simulation were compared with one ball and tapered mandrel simulations. Results showed that the use of three incremental balls significantly reduced the magnitude of non-conforming residual hoop stresses and the extension of these detrimental zone.

Numerical Analysis and Simulation of the Straightening Process of Heavy Rails on a Horizontal Roller-Straightening Machine

2019 ◽  
Vol 946 ◽  
pp. 775-781
Author(s):  
E.V. Timakov ◽  
F.S. Dubinskiy
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Hot Rolling ◽  
Input Data ◽  
Experimental Tests ◽  
Cooling Process ◽  
Horizontal Roller ◽  
Initial Camber ◽  
Heavy Rail

In this paper, the ABAQUS is adopted to carry on numerical simulation on straightening process of R65 heavy rail. The straightening process has been simulated here using the FE package of ABAQUS. All the input data were extracted from experimental tests according to tail manufacturing. Moreover, initial camber of the rail was measured after hot rolling and cooling process.

Thermal Behavior of Teeth During Restoration Procedure With Composite: Experimental Tests and Numerical Simulation

2020 ◽  
Vol 143 (2) ◽  
Author(s):  
M. Potenza ◽  
P. Coppa ◽  
L. Cerroni ◽  
G. Bovesecchi
Keyword(s):  
Numerical Simulation ◽  
Finite Difference ◽  
Thermal Behavior ◽  
Heat Generation ◽  
Resin Composite ◽  
Experimental Tests ◽  
Cylindrical Sample ◽  
Temperature Trend ◽  
Thermal Capacitance ◽  
Hard Tissues

Abstract Different thermal mechanisms influence the tooth temperature during the reconstruction practice of tooth restoration: conduction in the hard tissues and their thermal capacitance, heat generation by composite curing, irradiation of the surface from the LED lamp, convection, and conduction to the environment. All these phenomena were considered into a numerical (finite difference, FD) model to simulate the temperature trend in a tooth during reconstruction with a resin composite addition, and results compared with experiments on cylindrical sample with a cavity filled with resin. Results demonstrate that all the phenomena have been sufficiently accurately described, and the way to apply the model to real teeth is recognized.

scholarly journals Numerical simulation of the flow into a circular pipe section

2019 ◽  
Vol 85 ◽  
pp. 02005
Author(s):  
Gelu Muscă ◽  
George Mădălin Chitaru ◽  
Costin Ioan Coşoiu ◽  
Cătalin Nae
Keyword(s):  
Numerical Simulation ◽  
Fluid Flow ◽  
Fluid Motion ◽  
Experimental Tests ◽  
Navier Stokes ◽  
Ansys Fluent ◽  
Turbulent Airflow ◽  
Quantitative Results ◽  
Computational Fluid Dynamics Cfd ◽  
Unsteady Numerical Simulation

Computational Fluid dynamics (CFD) is the science that evolves rapidly in numerical solving of fluid motion equations to produce quantitative results and analyses of phenomena encountered in the fluid flow. When properly used, CFD is often ideal for parameterization studies or physical significance investigations of flow that would otherwise be impossible to replicate through theoretical or experimental tests. The aim of this paper is the study of the turbulent airflow and how the vortices formed in turbulent airflow are influenced by the evolution of the hydraulic characteristics of the fluid flow. Unsteady numerical simulation were performed using Reynolds Average Navier-Stokes (RANS) turbulence model adapted to conventional flow into a pipe with variable section which was implemented in the ANSYS FLUENT expert software.

NUMERICAL AND EXPERIMENTAL APPROACH FOR THE OPTIMAL DESIGN OF A DUAL PLATE UNDER BALLISTIC IMPACT

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1538-1543
Author(s):  
JEONGHOON YOO ◽  
DONG-TEAK CHUNG ◽  
MYUNG SOO PARK
Keyword(s):  
Numerical Simulation ◽  
Optimization Technique ◽  
Mesh Size ◽  
Experimental Tests ◽  
Ballistic Impact ◽  
Plastic Energy ◽  
Dual Plate ◽  
Element Erosion ◽  
Parameter Values ◽  
The Impact

To predict the behavior of a dual plate composed of 5052-aluminum and 1002-cold rolled steel under ballistic impact, numerical and experimental approaches are attempted. For the accurate numerical simulation of the impact phenomena, the appropriate selection of the key parameter values based on numerical or experimental tests are critical. This study is focused on not only the optimization technique using the numerical simulation but also numerical and experimental procedures to obtain the required parameter values in the simulation. The Johnson-Cook model is used to simulate the mechanical behaviors, and the simplified experimental and the numerical approaches are performed to obtain the material properties of the model. The element erosion scheme for the robust simulation of the ballistic impact problem is applied by adjusting the element erosion criteria of each material based on numerical and experimental results. The adequate mesh size and the aspect ratio are chosen based on parametric studies. Plastic energy is suggested as a response representing the strength of the plate for the optimization under dynamic loading. Optimized thickness of the dual plate is obtained to resist the ballistic impact without penetration as well as to minimize the total weight.

The Numerical Simulation Analysis of Irregular Frame Structure Dynamic Characteristics

2013 ◽  
Vol 739 ◽  
pp. 373-375
Author(s):  
Fang Zhang
Keyword(s):  
Numerical Simulation ◽  
Dynamic Characteristics ◽  
Simulation Analysis ◽  
Structure Design ◽  
Frame Structure ◽  
Ansys Software ◽  
Mass Percentage ◽  
Structure Dynamic ◽  
Characteristics Analysis ◽  
Dynamic Characteristics Analysis

A bump of irregular frame structure as an example, the use of ANSYS software, the structure dynamic characteristics analysis, given the cycle ratio and modal participation mass percentage, as the bump of irregular frame structure design reference.

Development of a New Nonbuckling Segmented Brace

2015 ◽  
Vol 15 (08) ◽  
pp. 1540012 ◽  
Author(s):  
H. Hao
Keyword(s):  
Compressive Force ◽  
Seismic Loading ◽  
Experimental Tests ◽  
Frame Structure ◽  
Structural Deformation ◽  
Frame Structures ◽  
Seismic Responses ◽  
Loading Effects ◽  
Cyclic Loading Tests ◽  
Steel Frame Structure

This paper introduces a new design of segmented nonbuckling brace member for use in frame structures to resist earthquake loading. The proposed segmented brace member consists of one or more segments connected by either tension-only or compressive force controlled joints. Because it cannot resist or can only resist a limited amount of compressive force, it is effective only under tension, but buckling would not be a failure mechanism of the brace. Its capability of mitigating seismic responses remains effective throughout the entire ground excitation duration. The other advantages of this new design include light weight, easy installation, easy replacement, controlled damage locations, and minimum or no residual structural deformation. The disadvantage is that full energy dissipations can be achieved only when it is in tension. Therefore they will be effective in a frame structure only when cross bracings are used. This paper presents experimental tests and numerical simulation results to examine the effectiveness of this innovative brace member in mitigating seismic responses of frame structures. Laboratory cyclic loading tests on a single brace member and on steel frames without bracing or with cross bracing by conventional brace or segmented brace are carried out. The testing results are analyzed and compared. The effectiveness of segmented brace members in mitigation of seismic loading effects on frame structures is demonstrated. Nonlinear response analyses are then carried out to investigate the performance of this new segmented brace applied to a steel frame structure subjected to ground motions of different amplitudes. The results demonstrate that this new design is effective in mitigating seismic loading effect throughout the entire ground motion duration.

Numerical Simulation of Friction Stir Welding (FSW) Process Based on ABAQUS Environment

2016 ◽  
Vol 254 ◽  
pp. 272-277
Author(s):  
Monica Iordache ◽  
Claudiu Bădulescu ◽  
Eduard Niţu ◽  
Doina Iacomi
Keyword(s):  
Numerical Simulation ◽  
Friction Stir Welding ◽  
Finite Elements ◽  
Adaptive Mesh ◽  
Experimental Tests ◽  
Arbitrary Lagrangian Eulerian ◽  
Complex Issue ◽  
Friction Stir ◽  
Mechanical Phenomena

. Simulation of the FSW process is a complex issue, as it implies interactions between thermal and mechanical phenomena and the quality of the welding depends on many factors. In order to reduce the time of the experimental tests, which can be long and expensive, numerical simulation of the FSW process has been tried during the last ten years. However, there still remain aspects that cannot be completely simulated. In this paper the authors present the steps of the numerical simulation using the finite elements method, in order to evaluate the boundary conditions of the model and the geometry of the tools by using the Arbitrary Lagrangian Eulerian (ALE) adaptive mesh controls.

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