numerical simulation of resistance spot welding process

... hydroplaning and skid resistance of passenger cars and trucks on highway pavements by means of numerical simulation The first part of research deals with the study of hydroplaning of smooth vehicular ... patterns The simulations were performed using the computational fluid dynamics software FLUENT The second part of the study involves the simulation of wet pavement skid resistance measurements of smooth ... 1055.4.4 Effects of Groove Pattern and MTD on Hydroplaning Speed 1055.5 Analysis of Simulation Results of Skid Resistance using ADINA Model 1085.5.1 Effect of Pavement Grooving on Skid Resistance 108

Ngày tải lên: 10/09/2015, 15:51

... fraction of shales Recently, Ipek et al (2008) conducted numerical studies of interbedded shales in SAGD The purpose of this research was to determine the potential of pressure cycling as a method of ... article: T Q C Dang , Z Chen , T B N Nguyen , W Bae & C L Mai (2013) Numerical Simulation of SAGD Recovery Process in Presence of Shale Barriers, Thief Zones, and Fracture System, Petroleum Science ... particular, the effect of a fracture system on SAGD operation is also described STATEMENT OF THE PROBLEM The success of SAGD has been mostly demonstrated by numerical simulation with homogeneous

Ngày tải lên: 16/12/2017, 00:02

... operation of offshore crane vessel is an integral part of all offshore activities starting from transportation, installation, maintenance and salvaging of various offshore structures The stability of ... cause loss of valuable asset and time The current research focuses on providing an insight of the entire process of offshore installation via the evaluation of hydrodynamic performances of a crane ... Application of BEM also allows convenient numerical modeling of arbitrary complex bodies moving with six degrees of freedom The calculation of the velocities of grid points and the determination of the

Ngày tải lên: 09/09/2015, 11:24

... Computational cost 94 4.4 Numerical simulation of free oscillation of liquid 95 4.5 Numerical simulation of violent fluid flows with breaking 97 4.5.1 Free oscillation of liquid in a container ... study of CPM 87 4.3.1 Influence of weighting functions in weighted least-square solution 88 4.3.2 Influence of influence radius 90 4.3.3 Influence of particle sizes 92 4.3.4 Influence of time ... CHINA) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CIVIL ENGINEERING NATIONAL UNIVERSITY OF SINGAPORE 2011 Trang 3Professor T Balendra, for his invaluable advice

Ngày tải lên: 10/09/2015, 15:51

... multi-processingblock-• Simulation of flows in an extended, wider range of Reynolds and Bondnumbers for large, realistic ratios of the density and viscosity of the fluids:– Simulation of air ... function of the number of SR steps.117 7.9 Divergence of the velocity as a function of the number of SR steps.117 Trang 16LIST OF FIGURES xivTrang 17• Excessively expensive in terms of time or ... 7CONTENTS v5.1 Introduction 73 5.2 Numerical simulation of bubble path instability 74 5.2.1 Review of existing numerical results 74 5.2.2 Our numerical results 76 6 Bubble-bubble

Ngày tải lên: 11/09/2015, 10:14

... NUMERICAL SIMULATION OF UNSATURATED FLOW USING MODIFIED TRANSFORMATION METHODS CHENG YONGGANG NATIONAL UNIVERSITY OF SINGAPORE 2008 NUMERICAL SIMULATION OF UNSATURATED FLOW ... weights(nip),points(nip,ndim),der(ndim,nod),& deriv(ndim,nod),fun(nod),kp(ndof,ndof), & funny(1,nod),pm(ndof,ndof),kg(ndof,ndof)) call sample (element,points,weights) num = g_num(:,iel) coord = transpose( ... serious issue of practical concern 1.3 Convergence Problems Because of the high nonlinearity of soil hydraulic properties, convergence problems exist in numerical simulations of unsaturated.

Ngày tải lên: 11/09/2015, 16:02

... A NUMERICAL SIMULATION OF UNDERWATER SHOCK-CAVITATION-STRUCTURE INTERACTION XIE WENFENG NATIONAL UNIVERSITY OF SINGAPORE 2005 A NUMERICAL SIMULATION OF UNDERWATER SHOCK-CAVITATION-STRUCTURE ... Delannoy, Numerical simulation of the unsteady behaviour of cavitating flows, Int J Numer Meth Fluids, 42, pp 527-548 2003 Coutier-Delgosha, O., R Fortes-Patella, J L Reboud., Simulation of unsteady ... Computational Methodology for the Simulation of Turbulent Cavitating Flows, PhD Thesis, University of Florida, 2002 Shin, B R., Y Iwata and T Ikohagi Numerical simulation of unsteady cavitating flows

Ngày tải lên: 12/09/2015, 21:10

... Trang 1NUMERICAL SIMULATION OF SEDIMENT TRANSPORT AND MORPHOLOGICAL EVOLUTION LIN QUANHONG NATIONAL UNIVERSITY OF SINGAPORE 2009 Trang 2NUMERICAL SIMULATION OF SEDIMENT TRANSPORT ... from all of them Trang 6Table of Contents Acknowledgements ii Table of Contents iv Summary viii List of Tables x List of Figures xi List of Symbols xx 1 Introduction 1 1.1 Background of Sediment ... 4.25: Time history of the total volume of the concentration; the total volume of concentration is normalized by its initial value ……….……… 130 Figure 4.26: Numerical simulation of Gaussian hump

Ngày tải lên: 14/09/2015, 08:41

... solution 65 4.3 Simulation of natural forms using gel materials 71 4.3.1 Effect of Young's modulus 71 4.3.2 Simulation of fruits and vegetables 73 4.3.3 Simulation of the drying of leaves 78 ... Initial shape of a in-plane unit of a square lattice of cylindrical holes 42 Figure 3.5 the bifurcation pattern of a unit model of a square lattice of holes 42 Figure 4.1 A model of a gel layer ... Effect of the thickness of the soft layer with E=1×10-5 (A) ts=1 (B) ts=0.2 57 Figure 4.10 Effect of the thickness of the soft layer with E=1×10-8 (A) ts=1 (B) ts=0.2 58 Figure 4.11 Bifurcation of

Ngày tải lên: 30/09/2015, 10:11

... 7mechanism of the performance enhancement of the devices by some of the fabrication techniques introduced in the experiments Firstly, simulation of the effect of different thickness of AlGaN barrier ... Characteristic 43 Chapter 4 Numerical Simulation Fundamentals 45 Chapter 5 Simulation of the Effect of Stress on AlGaN/GaN MOSHEMT 80 Trang 6SUMMARY In this work, the fabrication of the AlGaN/GaN MOSHEMT ... of GaN devices in terms of the requirements of different types of devices is presented Table III A comparison of the lattice constants, spontaneous and piezoelectric constants/coefficients of

Ngày tải lên: 03/10/2015, 20:31

... 7mechanism of the performance enhancement of the devices by some of the fabrication techniques introduced in the experiments Firstly, simulation of the effect of different thickness of AlGaN barrier ... Characteristic 43 Chapter 4 Numerical Simulation Fundamentals 45 Chapter 5 Simulation of the Effect of Stress on AlGaN/GaN MOSHEMT 80 Trang 6SUMMARY In this work, the fabrication of the AlGaN/GaN MOSHEMT ... of GaN devices in terms of the requirements of different types of devices is presented Table III A comparison of the lattice constants, spontaneous and piezoelectric constants/coefficients of

Ngày tải lên: 12/10/2015, 17:36

... Element of tensor in the direction of x axis and in a plane perpendicular to x axis yy Element of tensor in the direction of y axis and in a plane perpendicular to y axis xy Element of tensor ... direction of y axis and in a plane perpendicular to x axis yx Element of tensor in the direction of x axis and in a plane perpendicular to y axis ss Element of tensor in the direction of s axis ... Element of tensor in the direction of n axis and in a plane perpendicular to n axis sn Element of tensor in the direction of n axis and in a plane perpendicular to s axis ns Element of tensor

Ngày tải lên: 27/11/2015, 11:12

... NUMERICAL SIMULATION OF CONTACT LINE PROBLEMS USING PHASE FIELD MODEL HAN JUN NATIONAL UNIVERSITY OF SINGAPORE 2015 NUMERICAL SIMULATION OF CONTACT LINE PROBLEMS USING ... is the numerical MEP 53 Chapter The string method 4.3 Application of the string method saddle minima 3 2 1 −1 −2 −1 −3 −2 −4 −5 −3 −6 −5 −6 −4 −2 (a) One of the minimas of the the (b) One of the ... Chapter 2 Numerical Methods 2.3 2.3 Numerical methods for the phase field model Numerical methods for the phase field model Before presenting a detailed description of numerical

Ngày tải lên: 27/11/2015, 11:12

... THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING NATIONAL UNIVERSITY OF SINGAPORE 2004 Trang 2 Acknowledgements Acknowledgements The author would, first of all, like ... packages, which often are intricate multilayer structures, forms the basis of the present research Numerical simulation is employed to gain a deeper understanding on the initiation of cracks in ... cracking process: crack initiation, crack growth and final fracture The very question of dependence of growth of micro voids on stress, temperature and moisture-induced conditions are of paramount

Ngày tải lên: 27/11/2015, 11:18

... The profile of x-component of current velocity at point D2 91 Figure 4.36: The profile of y-component of current velocity at point D2 91 Figure 4.37: The profile of x-component of current ... NUMERICAL SIMULATION OF LARGE-SCALE WAVES AND CURRENTS ZHANG DAN NATIONAL UNIVERSITY OF SINGAPORE 2004 NUMERICAL SIMULATION OF LARGE-SCALE WAVES AND CURRENTS ... current speed (m/s) Figure 4.38: The profile of y-component of current velocity at point D3 92 4.4 SIMULATION OF OCEAN CIRCULATION IN SINGAOPRE WATERS Because of geographic and economic importance,

Ngày tải lên: 27/11/2015, 11:18

... clarity, the various parts of the resistance spot welding machine are identified. UG-003 335 Page 6 SECTION 4 − FUNDAMENTALS OF RESISTANCE SPOT WELDING 4-1. Principle Resistance welding is accomplished ... the arc welding circuit. Processes Description Resistance Spot Welder Resistance Spot Welding 003 335A July 2005 Visit our website at www.MillerWelds.com HANDBOOK FOR Resistance Spot Welding WARNING This ... Uses Of Resistance Spot Welding Y SPOT WELDING can be hazardous. Read and follow Safety Section at front of this book as well as the Owner’s Manual and all labels on the equipment. Resistance spot...

Ngày tải lên: 25/01/2014, 20:20

... those of brittle and ductile materials. Figure 2.1 shows a comparison of the relative sizes of the process zones occurring in the three types of materials mentioned. The original formulation of ... generation of the ge- ometry of the material (random placement of aggregates within the mortar) and the detailed discretisation of the elements to adequately reproduce the geometry of the interfaces. ... material Crack w Figure 2.8: Definition of the cohesive crack model softening law (Figure 2.8). The softening law is the analytical description of the variation of the tensile stress and displacement...

Ngày tải lên: 26/05/2014, 17:57