Numerical Simulation of Tornado Missile Impact on Steel Stack

2017 ◽  
Author(s):  
George Antaki ◽  
Ramiz Gilada ◽  
Derrick Pease
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Numerical Analysis ◽  
Failure Modes ◽  
Material Models ◽  
Design Basis ◽  
Damage Criteria

This paper describes the methods and criteria for the numerical analysis of damage caused by tornado missiles to steel stacks. The paper will describe the range of classic design-basis tornado missiles, the target steel stacks, and the key parameters that affect the analysis. The models of missile and targets will be addressed, as well as the benchmark of calculated damage compared to experimental data. Strain-based material models and strain-based criteria will be described, to predict the various failure modes and the structural and functional damage criteria.

Numerical Simulation and Experimental Research on Fatigue Strength of the Injector Guide Pillar under Complex Loads

2010 ◽  
Vol 118-120 ◽  
pp. 196-200
Author(s):  
Jin Guo Li ◽  
Xiao Gui Wang ◽  
Zeng Liang Gao
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Numerical Simulation ◽  
Experimental Study ◽  
Fatigue Life ◽  
Fatigue Strength ◽  
Numerical Analysis ◽  
Experimental Research ◽  
Contact Surface ◽  
Electronic Measurement

Under the complex loads, the injector guide pillar (IGP) used in injection machine was failure only after 1.5-year-service. In order to determine the cause of the fracture, the numerical simulation technology was applied to analyze the mechanical properties of the IGP. The contact between the mating surfaces of the clamping mechanism was modeled; nonlinear multi-region contact of surface-surface was applied to establish the contact model of FEA. The constraint of tie was used for modeling thread joint. The simulated results indicated that the smaller area of contact surface, the higher value of stress in the neck of IGP. Electronic measurement was also used to check the results of stress in IGP obtained by FEA. It was found that the experimental data agreed well with simulated results. Based on the numerical analysis and experimental study, the structure of IGP was improved by adopting a smoother double-round neck. The fatigue life of the improved structure was longer than that of the original machine.

scholarly journals Numerical analysis and experimental verification of elastomer bending process with different material models

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Stanislaw Kut ◽  
Grazyna Ryzinska ◽  
Bernadetta Niedzialek
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Bending Test ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
Material Models ◽  
Material Constants ◽  
Elastomeric Material ◽  
Bending Process ◽  
Tension Testing

Abstract The article presents the results of tests in order to verifying the effectiveness of the nine selected elastomeric material models (Neo-Hookean, Mooney with two and three constants, Signorini, Yeoh, Ogden, Arruda-Boyce, Gent and Marlow), which the material constants were determined in one material test - the uniaxial tension testing. The convergence assessment of nine analyzed models were made on the basis of their performance from an experimental bending test of the elastomer samples from the results of numerical calculations FEM for each material models. To calculate the material constants for the analyzed materials, a model has been generated by the stressstrain characteristics created as a result of experimental uniaxial tensile test with elastomeric dumbbell samples, taking into account the parameters received in its 18th cycle. Using such a calculated material constants numerical simulation of the bending process of a elastomeric, parallelepipedic sampleswere carried out using MARC / Mentat program.

Behavior of Simulated Molten Metal at Channel Modeled Boiling Water Reactors

2017 ◽  
Author(s):  
Yutaro Hihara ◽  
Kota Matsuura ◽  
Hideaki Monji ◽  
Yutaka Abe ◽  
Akiko Kaneko ◽  
...  
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Numerical Analysis ◽  
Molten Metal ◽  
Numerical Results ◽  
Boiling Water ◽  
Severe Accident ◽  
Boiling Water Reactors ◽  
Simulation Code ◽  
Water Reactors

When a severe accident occurs, decommissioning work becomes important task. In the decommissioning work after the severe accident, establishing the way to estimate the sedimentation place of molten debris is important. However, the technique to estimate exactly sedimentation place has not been enough. Therefore, the detailed and phenomenological numerical simulation code named JUPITER for predicting the molten core behavior is under development. The comparison between experimental and numerical results is necessary to clarify the validity of the numerical analysis code. This study provides the experimental data for a BWR to examine the numerical simulation code in order to contribute to progress of the decommissioning work.

Numerical Analysis of the Flow Within a Clark Turbocharger Compressor

2004 ◽  
Author(s):  
K. S. Chapman ◽  
Sudip Dey ◽  
Ali Keshavarz
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Numerical Analysis ◽  
Flow Field ◽  
Field Test ◽  
Numerical Results ◽  
Operating Conditions ◽  
Flow Recirculation ◽  
Flow Through

The flow field within a Clark turbocharger compressor has been thoroughly analyzed by numerical simulation. The numerical simulation was validated with experimental data collected from field test sites. The numerical results are found to closely match the experimental data. Once validated, the numerical simulation was used to investigate the flow field within the turbocharger compressor under a variety of operating conditions. Several regions of flow recirculation were identified that restrict flow through the turbocharger.

scholarly journals A comparative analysis of several material models in LS-DYNA at high velocity impact

2019 ◽  
Vol 221 ◽  
pp. 01007
Author(s):  
Arina Bakulina ◽  
Andrey Buzyurkin
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
High Velocity Impact ◽  
Element Analysis ◽  
Material Models ◽  
Dynamic Hardness ◽  
Velocity Impact ◽  
Analysis Package ◽  
Experimental Values ◽  
Comparison Of The Results

The questions of application of the LS-DYNA finite element analysis package for describing the interaction of a spherical projectile and a massive metal obstacle are considered. Based on a comparison of the results of numerical simulation with experimental data, a qualitative possibility has been shown to determine the magnitude of the dynamic hardness of the obstacle material.A simulation of the collision of a spherical impactor and a massive metal barrier shaped as a cube is performed. Data are obtained on the penetration of the striker into the barrier.Using the simulation curve, the values of the dynamic hardness of the obstacle were restored and a comparison was made with their experimental values. The qualitative correspondence is shown.

Effects of Mechanical Properties of Kevlar/PTFE Fabric-Reinforced Self-Lubricating Liners on Performance of Self-Lubricating Spherical Plain Bearings

2010 ◽  
Vol 29-32 ◽  
pp. 197-202 ◽  
Author(s):  
Yu Lin Yang ◽  
Chun Rong Ma ◽  
Shi Jun Huang ◽  
Li Qin Jing ◽  
Hao Tian Pang
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Numerical Simulation ◽  
Service Life ◽  
Load Capacity ◽  
The Self ◽  
Material Models ◽  
Reinforced Polymer ◽  
Optimum Model

The effects of the mechanical properties of Kevlar/PTFE fabric-reinforced polymer-based self-lubricating liners on the performance of the self-lubricating spherical plain bearings were investigated to improve the evaluation technology of the performance of the self-lubricating liners and the bearings. The mechanical experiments were carried out to study the mechanical properties of the liners with the use of Instron 5848 microtester. Based on these experimental data, several material models of liners were used to carry out the curve fitting, and the 3-terms Ogden form was chosen as an optimum model for the FEM numerical simulation of bearings with and without liners under the conditions of variable loads. These results show that: the mechanical properties of the liners has an important influence on the performance of the bearings; Owing to the elastic properties of the liners, the contact area is increased, and the contact stress between sliding faces are decreased, which improve the load capacity and service life of the bearings; An optimum elastic property of the liners is existed for the performance of the spherical plain bearings. The present study may provide evidence for the improvement of the evaluation technology of the liners and bearings, the further understanding of the role of the liners in the bearings, and the design of the fabric self-lubricating liners.

Design and laboratory verification of a physical model of sloping capillary barrier

2004 ◽  
Vol 41 (5) ◽  
pp. 814-830 ◽  
Author(s):  
Denny Tami ◽  
Harianto Rahardjo ◽  
Eng-Choon Leong ◽  
Delwyn G Fredlund
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Numerical Analysis ◽  
Physical Model ◽  
Water Pressure ◽  
Experimental Studies ◽  
Silty Sand ◽  
Capillary Barrier ◽  
Simulation Results ◽  
Barrier Model

A physical model was designed and constructed to study the mechanisms associated with capillary barriers for slope stabilization purposes. Prior to construction of the model, various numerical analyses were conducted to determine the optimum dimensions and appropriate soil types for the materials of the capillary barrier model. This paper is divided into three sections: the first two sections are related to the design of the model and are to obtain the optimum dimensions of the model and to investigate the range of soil properties that are most suitable for experimental studies in the laboratory; and the last section is laboratory verification of the numerical analysis where the numerical simulation results are compared with the experimental data. Based on the numerical simulation results, the physical capillary barrier model was constructed using two different combinations of soils, namely silty sand over gravelly sand and fine sand over gravelly sand. From the comparison of the numerical results and experimental data, it was found that the numerical analysis was able to simulate the experiment on the physical capillary barrier model reasonably well.Key words: physical capillary barrier model, unsaturated water flow, numerical simulation, pore-water pressure, volumetric water content, slope stability, infiltration.

scholarly journals Fibre-induced drag reduction

2008 ◽  
Vol 602 ◽  
pp. 209-218 ◽  
Author(s):  
J. J. J. GILLISSEN ◽  
B. J. BOERSMA ◽  
P. H. MORTENSEN ◽  
H. I. ANDERSSON
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Reynolds Number ◽  
Drag Reduction ◽  
Elastic Layer ◽  
Turbulent Drag Reduction ◽  
Rigid Polymer ◽  
Fibre Concentration ◽  
Induced Drag ◽  
Turbulent Drag

We use direct numerical simulation to study turbulent drag reduction by rigid polymer additives, referred to as fibres. The simulations agree with experimental data from the literature in terms of friction factor dependence on Reynolds number and fibre concentration. An expression for drag reduction is derived by adopting the concept of the elastic layer.

Simulation of a Free Standing Riser Model and Validation With Experimental Results

2014 ◽  
Author(s):  
Marcio Yamamoto ◽  
Sotaro Masanobu ◽  
Satoru Takano ◽  
Shigeo Kanada ◽  
Tomo Fujiwara ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Previous Experiment ◽  
Numerical Results ◽  
Experimental Results ◽  
Previous Article ◽  
Scale Model ◽  
Analysis Software ◽  
Free Standing ◽  
Reduced Scale

In this article, we present the numerical analysis of a Free Standing Riser. The numerical simulation was carried out using a commercial riser analysis software suit. The numerical model’s dimensions were the same of a 1/70 reduced scale model deployed in a previous experiment. The numerical results were compared with experimental results presented in a previous article [1]. Discussion about the model and limitations of the numerical analysis is included.

Vibro-Stone Column Reinforcement Mechanism and Numerical Analysis

2012 ◽  
Vol 446-449 ◽  
pp. 1940-1943
Author(s):  
Yang Liu ◽  
Hong Xiang Yan
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Pore Pressure ◽  
Numerical Procedure ◽  
Numerical Results ◽  
Excess Pore Pressure ◽  
Stone Column ◽  
Reinforcement Mechanism ◽  
Consolidation Theory ◽  
Excess Pore

Numerical simulation of vibro-stone column is taken to simulate the installation of vibro-stone column. A relationship based on test is adopted to calculate the excess pore pressure induced by vibratory energy during the installation of vibro-stone column. A numerical procedure is developed based on the formula and Terzaghi-Renduric consolidation theory. Finally numerical results of composite stone column are compared single stone column.

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