Finite Element Analysis of Reaction Front Tracking in Lime Calcination

2011 ◽  
Author(s):  
P. Ch. Gourisankar Sandaka ◽  
Ashok Kumar Nallathambi ◽  
Eckehard Specht
Keyword(s):  
Finite Element ◽  
Reaction Front ◽  
Temperature Profiles ◽  
Decomposition Rates ◽  
Element Analysis ◽  
Calcination Process ◽  
Front Position ◽  
Rotary Kilns ◽  
Lime Particle ◽  
Element Technique

Calcination process is carried out in shaft kilns or rotary kilns for producing the lime. In the present work, the decomposition rates of the limestone in shaft kiln are experimentally measured in laboratory scale equipment. Mathematical model has been developed by using Finite element technique to track the reaction front movement from the surface to the core. The results obtained from the experiments are compared and validated with that of the model. Influences of parameters such as ambient temperature and the particle size are studied. The variation of reaction zone thickness during the process of decomposition has been studied and analyzed. Temperature profiles inside the lime particle are calculated and the influence of the reaction front position on these temperature profiles has been analyzed.

Tire Bead Overheating in Urban Buses and Trucks Using Drum Brake Systems

1998 ◽  
Vol 26 (1) ◽  
pp. 51-62
Author(s):  
A. L. A. Costa ◽  
M. Natalini ◽  
M. F. Inglese ◽  
O. A. M. Xavier
Keyword(s):  
Heat Transfer ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Thermal Energy ◽  
Structural Integrity ◽  
Experimental Temperature ◽  
Temperature Profiles ◽  
Element Analysis ◽  
Drum Brake ◽  
Fea Model

Abstract Because the structural integrity of brake systems and tires can be related to the temperature, this work proposes a transient heat transfer finite element analysis (FEA) model to study the overheating in drum brake systems used in trucks and urban buses. To understand the mechanics of overheating, some constructive variants have been modeled regarding the assemblage: brake, rims, and tires. The model simultaneously studies the thermal energy generated by brakes and tires and how the heat is transferred and dissipated by conduction, convection, and radiation. The simulated FEA data and the experimental temperature profiles measured with thermocouples have been compared giving good correlation.

Determination of Stress Concentration Around an Oblique Hole by a Finite-Element Technique

1983 ◽  
Vol 105 (2) ◽  
pp. 206-212 ◽  
Author(s):  
Hua-Ping Li ◽  
F. Ellyin
Keyword(s):  
Finite Element ◽  
Stress Concentration ◽  
Maximum Stress ◽  
Plate Thickness ◽  
Two Dimensional ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Parametric Studies ◽  
Element Technique

A plate weakened by an oblique penetration of a circular cylindrical hole has been investigated. The stress concentration around the hole is determined by a finite-element method. The results are compared with experimental data and other analytical works. Parametric studies of effects of angle of inclination, plate thickness, and width are performed. The maximum stress concentration factor (SCF) obtained from the finite-element analysis is higher than experimental results, and this deviation increases with the increase of angle of skewness. The major reason for this difference is attributed to the shear-action between layers parallel to the plate surface which cannot be directly included in the two-dimensional elements. An empirical formula is derived which accounts for the shear-action and renders the finite-element predictions in line with experimentally observed data.

Experimental Analysis and FEA of Friction Stir Welding on Aluminium Plates

2012 ◽  
Author(s):  
Elias Ledesma ◽  
Eduardo Aguilera ◽  
Gilberto Villalobos
Keyword(s):  
Finite Element ◽  
Friction Stir Welding ◽  
Experimental Analysis ◽  
Tensile Tests ◽  
H13 Steel ◽  
Element Analysis ◽  
Friction Stir ◽  
Ale Formulation ◽  
Element Technique ◽  
Von Mises

An experimental study and a numerical simulation of friction stir welding (FSW) process on aluminum 6064 plates is presented. The numerical analysis is performed using finite element technique with LsDyna software and the Aleatory Lagrangian Eulerian (ALE) formulation. Input parameters on the FEM are the mechanical properties of the aluminum 6064 as workpiece and H13 steel properties as the tool. The finite element analysis results shown Von Mises stresses and plastic strain developed during the process. An experimental analysis was conducted with the variation of process parameters and the specimens obtained were evaluated by x-ray inspection, tensile tests, and hardness measurements.

Effect of Adhesive Behavior on Normal Stress Distributions in the Single-Lap Adhesive Joints

2015 ◽  
Vol 1088 ◽  
pp. 769-773
Author(s):  
Xiao Cong He
Keyword(s):  
Finite Element ◽  
Normal Stress ◽  
Three Dimensional ◽  
Adhesive Layer ◽  
Elastic Stiffness ◽  
Adhesive Joints ◽  
Stress Distributions ◽  
Element Analysis ◽  
Element Technique ◽  
Three Dimensional Finite Element

The effect of adhesives behavior on the normal stress distributions of single-lap adhesive joints is investigated using the three-dimensional finite element technique. Numerical examples are provided to show the influence on the normal stresses of the joints using adhesives of different characteristics which encompass the entire spectrum of elastic stiffness behaviour. finite element analysis solutions of the normal stress distributions in the adhesive layer have been obtained for four typical characteristics of adhesives. The results indicate that Young’s modulus and Poisson’s ratios of adhesives strongly affect the normal stress distributions of the joints.

The Finite Element Analysis of New Forged Coupler Knuckle

2013 ◽  
Vol 367 ◽  
pp. 122-125
Author(s):  
Guang Xin Wang ◽  
Xiang Shun Bu ◽  
Lin Jie Li ◽  
Li Li Zhu
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Direct Relationship ◽  
Element Analysis ◽  
Compression Load ◽  
The Finite Element Analysis ◽  
Simulation Results ◽  
Element Technique ◽  
Working Situation ◽  
Made In

As one of the most important load-bearing parts, coupler knuckle has a direct relationship with the safety in operation and reliability of the freight trains. A new forged coupler knuckle is made in order to meet the challenge to export ore train to Australia. Using the finite element technique, the stress characteristics of forged coupler knuckle under 1225kN load in tension and 1500kN compression load are evaluated. Simplify the load and boundary condition depend on the real working situation, the numerical simulation results coincide with experimental data.

Finite Element Analysis of Engine Bore Distortions During Boring Operation

1993 ◽  
Vol 115 (4) ◽  
pp. 379-384 ◽  
Author(s):  
N. N. Kakade ◽  
J. G. Chow
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Piston Ring ◽  
Experimental Studies ◽  
Temperature Gradients ◽  
Element Analysis ◽  
Temperature Changes ◽  
Simulation Procedure ◽  
Finite Element Package ◽  
Element Technique

Bore geometry is the major factor affecting oil comsumption, piston ring wear, and frictional losses in an engine. As such, auto industries have been constantly striving to develop better machining technologies to produce engine bores with greater precision. Experimental studies have shown that the bore distortion as a result of machining is mainly caused by temperatures and stresses created during cutting. Consequently, optimization of machining conditions so as to minimize both bore temperature gradients as well as mechanical stresses while machining should lead to the production of better bore geometry. This research develops a model aimed at simulating bore distortions caused by temperature changes and stresses generated during machining using finite element technique. The commercial finite element package ANSYS has been used along with the CAD package I-DEAS to simulate the boring process on DEC-VAX computers. The simulation procedure developed can be used to obtain a better understanding of the boring process, in particular, to determine distortion trends for different cutting conditions.

Strength Checking and Finite Element Analysis to Hoisting Pads for Launching on Horizontal Slipway

2013 ◽  
Vol 380-384 ◽  
pp. 181-185
Author(s):  
Ya Nan Huang ◽  
Da Lu Liu ◽  
Feng Sheng Sun ◽  
Yu Wang ◽  
Dong Lu
Keyword(s):  
Finite Element ◽  
Structural Strength ◽  
Frictional Coefficient ◽  
Bulk Carrier ◽  
Element Analysis ◽  
Processing Scheme ◽  
Proper Number ◽  
Box Beams ◽  
Pulling Force ◽  
Element Technique

In this paper, with a 92,500 ton bulk-carrier being mainly taken as an example, the preparing design of launching processing scheme on the horizontal berth is discussed. Calculation of needed hulling force and strength examination of hoisting pad are done, and then the structural strength of hoisting pads and their stiffening structures are analyzed with the aid of finite element technique. Once the total assembly of hull is completed on the berth, the launching weight should be calculated and proper number of box-beams should be determined. Sliding frictional media used between box-beams and slipping-rails should be selected, and according to combined frictional coefficient, the needed pulling force by which the hull may be hoisted forward securely should be fixed. In order to assure the safety of ship in the period of launching, strength examination calculating for hoisting pads and stiffening members should be done by means of finite element method as soon as their types and assembling positions are determined, so that the strength of hoisting pads and stiffening structures should be able to meet the requirements. Owing to that this ship having being successfully launched, the reliability and usability stated in this paper have being verified. Therefore, it is of quite value to be referred in technical analysis for launching on the horizontal slipway.

Evaluation of 3D Embedded Element Technique in the Finite Element Analysis for the Composite

2019 ◽  
Vol 801 ◽  
pp. 65-70
Author(s):  
Jian Hong Gao ◽  
Xiao Xiang Yang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Aspect Ratio ◽  
Conventional Method ◽  
Volume Fraction ◽  
Fe Model ◽  
Element Analysis ◽  
High Fiber ◽  
Fiber Aspect Ratio ◽  
Element Technique

RVE combined with finite element analysis (FEA) is a very popular method to predict the mechanical property of the composite reinforced by short fibers. In the conventional method, generally the “tie” approach is used. By this method, the FE model with high fiber aspect ratio can not be achieved and the non-convergence of the numerical calculation may appear because of the complex mesh. The embedded element techinique is considered to be a replaceable method . Using this method, the mechanical behavior of composite with high fiber aspect ratio would be simulated. Therefore, in this study, the 3D solid element was employed for the FE model with multi cylinder particles. The comparisions of the Mise stress and the displacement between the embedded and conventional method indicate that compared with the stress transfer, the simulated result of composite stiffness is more accurate. In addition, the effects of model size, fiber orientated angle, fiber volume fraction and fiber aspect ratio were investigated. The numerical results were compared with the Mori-Tanaka model and the good agreements verify the applicability of the embedded element technique we studied in this paper.

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