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THE 25th ISRAEL CONFERENCE ON MECHANICAL ENGINEERING Technion City, Haifa, Israel May25-26, 1994 UNI VERGrrATof;! :; :_; HANNOVtn Conference Proceedings UB/TIB Hannover 89 117 012 22X

THE 25th ISRAEL CONFERENCE ON MECHANICAL ENGINEERING

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Page 1: THE 25th ISRAEL CONFERENCE ON MECHANICAL ENGINEERING

THE 25th ISRAEL CONFERENCE

ON MECHANICAL ENGINEERING

Technion City, Haifa, Israel

May25-26, 1994

UNI VERGrrATof;!:; :_;HANNOVtn

Conference ProceedingsUB/TIB Hannover 89117 012 22X

Page 2: THE 25th ISRAEL CONFERENCE ON MECHANICAL ENGINEERING

TABLE OF CONTENTS

CHAPTER 1 Technical Plenary Papers

Applications of Laser Technologies in Mechanical EngineeringM. Oron 1

Industrial Grand Challenges - a Competitiveness Strategy for the DOE National LaboratoriesR.W. Weme 4

CHAPTER 2 State-of-the-Art in Emerging Technologies

Global and Local Approach to Brittle Fracture ofFerritic SteelsA. Pineau 8

Active Control and Reduction of Noise Pollution and VibrationsG. Rosenhouse 16

Mechanical Engineers in the Project Management EnvironmentE.Y. Mozes 24

Environmental Conservation - Challenges for Mechanical Engineers in Chemical IndustriesR. Cohen-Zidon 29

An Update on Agile ManufacturingK. Preiss 36

Electronic Circuit PackagingA. Livni 39

High Speed MachiningH. Schulz 43

CHAPTER 3 Industrial Challenges

Challenges for a Mechanical Engineer in a Large Industry

M. Kacz 49

CHAPTER 4 Leading Industrial Projects

Helicopter Dynamic Components - Health and Usage Monitoring

Y. Elazar, J. Bortman 51MECSIP - Mechanical Equipment and Subsystems Integrity Program

J. Bortman, Y. Elazar 52Tailoring a Dynamic Environment Spectrum for Combat Vehicles

E. De-Medonsa, G. Reina, Y. Alfassa 5 4

Oil Shale Fired Power PlantM. Shaal, V. Podshivalov, A. Wohlfarth 5 6

BARAK Missile's Vertical LaunchS. Katzir, G. Amir, Z. Fruchter 6°

Service Life Determination of Mil Field Artillery CannonA. Hirshnzon, A. Melamed, H. Zakai 6 3

Braking Systems in Off-Road VehiclesS. Hileli, A. Ben-Zvi 66

CHAPTER 5 Aerosols

Nonsteady Air Flow from a Well in Porous MediaI. Shnaid, S. Olek 6 7

Resuspension of P articulates from Surfaces to Turbulent Flows - Review and AnalysisG. Ziskind, M. Fichman, C. Gutfmger 7 0

Page 3: THE 25th ISRAEL CONFERENCE ON MECHANICAL ENGINEERING

An Analytical Model for Aerosol Collection in Nonuniform Filter MediaM. Shapiro 73

Thermophoretic Deposition of Fine Particles from Longitudial Flow over a CylinderA.L. Yarin 75

CHAPTER 6 Bio-Engineering

Effect of Implant Material Properties on the Performance of a Hip Joint ReplacementA. Rotem 76

Intracellular Control of Cardiac Muscle ContractionA. Landesberg, R. Beyar, S. Sideman 79

Learning by Artificial Neural Networks the Developement of Fatigue in Paralyzed Human Muscles DuringIsometric Functional Electrical Stimulation

M. Domay, O. Yadid-Pecht, J. Mizrahi, E. Isakov, Z. Susak 82

CHAPTER 7 Computer Aided Design (CAD) and Manufacturing (CAM)

Robot Assisted Removal of Sheet Metal ProductsG. Mendelsohn, M. Shpitalni, M. Shoham 85

A Method for Extracting and Thickening a Mid-Surface of a 3-D Injection Molded Object Represented in NURBSA. Fischer, K.K. Wang 89

Freeform Surface Machining in Multi-Axis Milling EnvironmentG. Elber 92

Real Time Approximation of Spatial Curves and its Application to Computer Controlled MachinesL. Livshits, M. Shoham 95

Representation of Manufacturing Features for Automatic Manufacturing DesignK. Preiss, G. Shimoni 98

Extending the Scope of CADY.Reich 101

Relaxed Parametric Design with Probabilistic ConstraintsY. Hel-Or, A. Rappoport, M. Werman 104

Surface Enveloping Studied Using Computerized Symbolic ManipulationF. Montoya, B. Epureanu 107

CHAPTER 8 Coatings

Micro-Electro-Mechanical Systems and CoatingsY. Nemirovsky I l l

Surface Crack Growth Delay by a Flexible CoatingE. Altus, A. Kisin 112

New Method for Surface Treatment of Metals and AlloysP. Dvoskin, M. Rosenberg 115

Surface Modification of Titanium and Titanium AlloysA. Raven 118

Study of Deposition of Diamond on Cemented Carbide SubstratesA. Mehlmann, S. Berger, M. Bamberger, S.F. Dimfeld 121

Mechanical Properties of Diamond-Like Carbon FilmsA. Raveh, H.M. Hawthorne, L. Martinu, P. Leroux, MR. Wertheimer 124

CHAPTER 9 Composite Materials

Ceramic Laminate as a Candidate for High Temperature ApplicationD. Sherman 128

Manufacturing, Micro structure and Mechanical Performance of Single Polymer Polyethylene CompositesA. Teishev, G. Marom 130

Page 4: THE 25th ISRAEL CONFERENCE ON MECHANICAL ENGINEERING

Nonclassical Optimization Problems in Mechanics of Growing Composite SolidsA. Drozdov, A.L. Kalamkarov 133

Buckling and Post-Buckling of Laminated Non-Circular Cylindrical ShellsI. Sheinman, M. Firer 136

High Order Bending of Sandwich Beams with Transversely Flexible Core and Non-Parallel SkinsD. Peled, Y. Frostig 142

The Effect of Artificial Local Damage on Stresses and Failure of Composite Sandwich Panels0 . Dancygier, J. Avrashi, O. Ishai 148

CHAPTER 10 Computational Mechanics

Accurate Finite Element Methods for Time-Harmonic Wave Propagation1. Harari 151

Numerical Procedures for the Solution of Exterior Acoustics ProblemsD. Givoli 154

Influence of an Electric Field on the Thermocapillary Drift of a Gas BubbleA.Y. Gelfgat, I. Tanasawa 157

An Interative Method of Boundary Elements for Solving Mixed Boundary Value Problems in the Theory of ElasticityO.P. Nikolayev 160

Substructuring of Composite Panels - Mixed Grids of Elements, Strips and Transient Strip ElementsD. Marom, J. Avrashi 162

Numerical Analysis of Material Interface Singularities in 2-D Linear Elastostatics by the p-Version of the FiniteElement Method

Z. Yosibash, B.A. Szabo 165Extension of an Asymptotic Algorithm to Orthotropic Viscoplastic Structural Analysis

I. Iskovitz, T.Y.P. Chang, A.F. Saleeb 169Vibrations and Buckling of Non-Symmetric Laminated Composite Beams via the Exact Element Method

H. Abramovich, M. Eisenberger, O. Shulepov 172

CHAPTER 11 Control

The Use of Worm Gear Transmissions in Electromechanical Systems: Analysis, Digital Control and ApplicationsM. Cohen, I. Cohen 175

Internal Model Control for High Sampling Rates - Analysis and Design Using Delta OperatorI. Peled, Z. Palmor, A. Feuer 183

Visualizing Design Variables In Sample-Data Control SystemsJ.E. Luntz, M.L. Nagurka, T.R. Kurfess 186

Control of Coal Gasification in Recirculated Fluidized BedE. Wolfson, J. Dayan, MR. Judd 1 89

Optimal Maneuver of a Flexible Arm by Space - Time Finite Element MethodA. Ben-Tal, P. Bar-Yoseph, H. Flashner 193

The Use of Residence Time Distribution Technique in Adaptive Control of Industrial ProcessesK. Zaidman, J. Dayan 196

Optimal Maneuvers of an Axial Symmetric Rigid Body, Rotating Around its Center of MassI. Ioslovich *"9

CHAPTER 12 Design and Optimization

Technical Drawings in the Computer Age, Design for ManufacturabilityA. Shlamovitz 2 0 1

Improving the Positioning Accuracy of Pneumatic Servo ActuatorsI. Krivtz, R. Eshel 2 0 4

Deep Artificial Intelligence Knowledge for Truss AnalysisK. Preiss, O. Shai 2 0 7

Page 5: THE 25th ISRAEL CONFERENCE ON MECHANICAL ENGINEERING

Guide to Design Reviews During a Project Life CycleZ. Nevo 210

On a Self Centering Gripper Designed with a Peculiar Four Position SynthesisD. Perju, V. Mesaros-Anghel 214

A New Field Single Wheel TesterD. Ronai, I. Shmulevich, D. Wolf 217

Models of Optimal Design of Ribbed Cylindrical Shells Under Stochastic LoadsYu.M. Pochtman, LA. Kamovsky, M. Fridman 221

Accuracy and Strength of a Joint Loaded by Suddenly Applied TorqueI. Lopatukhin 224

CHAPTER 13 Dynamic Response of Materials

Measurement of Dynamic Properties ofViscoelastic MaterialsV.B. Biesel, I. Green 227

Frequency Independent Model for DampingG. Muravski 230

Hardened Cement Paste Response to Impulsive LoadingI. Avnon, D.Z. Yankelevsky 233

Impact and Penetration: Rigid and Extensible StructuresL.I. Slepyan 239

Moderating the Explosive Decompression Wave to Prevent Destructive Decompression from DestroyingExplosively Fabricated Objects

D.R. Garrett 242Nonlinear Wave Propagation in Random Media

E. Pelinovsky, T. Talipova 246

CHAPTER 14 Dynamic Systems

Constraint Forces and Relaxation of ConstraintsS.Djerassi 249

Dynamics of Thin-Walled Structures Interacting with a MediumM.V. Ayzenberg-Stepanenko 253

Analysis of Pressure Fields in a Non-Steady-State Problem of HydroelasticityV. Krylov 256

Resonant Waves in Elastic WaveguidesM.V. Ayzenberg-Stepanenko 259

Up-Dating Linear Elastic Models Based on Computational Selective SensitivityS. Cogan, G. Lallement, Y. Ben-Haim 262

Summarized Structural Vibroprotective Models for Deformable Systems With Distributed ParametersI. Kamovsky, I. Chaikovsky, O.I. Lebed, Y. Pochtman 265

CHAPTER 15 Engines and Combustion

Stationary Combustion of Solid PropellantsA. D. Drozdov, A. Pridor, I. Shreiber 268

A Theoretical Study of the Effect of Heat of Reaction and Heat Losses on the Devolatilization of CoalB. Zmiri, E. Sher 2 7 1

Computer Modeling of Blended Fuel Operation of Spark-Ignition EnginesE. Moses, A. Yarin, P. Bar-Yoseph 2 7 4

Cyclic Variability in Spark Ignition Engines - Sources, Reasons and MechanismN. Ozdor, M. Dulger, E. Sher 2 7 7

The Effect ofOxigenates Additives in Motor Fuel Blends on the Exhaust Gas ToxicityA. Neimark, V. Kholmer, E. Sher 2 8 2

Page 6: THE 25th ISRAEL CONFERENCE ON MECHANICAL ENGINEERING

The Effect of Adding Ignition and Combustion Improvers to Diesel Fuel on the Engine PerformanceM. Gutman, L. Tartakovsky, T. Gruenwald, Y. Zvirin 286

Evaluation of an Engine Friction Power by Using Inertia MeasurementsR. Harari, E. Sher 289

CHAPTER 16 Fluid Mechanics

Stability Analysis of Incompressible Source and Sink FlowsM. Shusser, D. Weihs 292

The Effect of Variable Fluid Properties on the Stability of Double Diffusive LayerJ. Tanny, V. Gotlib, A. Tzinober 295

On the Relation Between Spacing and Frequencies in Turbulent Bursts Near WallsP. Vainshtein, M. Fichman, D. Pnueli 298

Application of an Algebraic- Q4 Turbulence Model for Transonic Airfoil FlowsE. Shalman, A. Yakhot, O. Igra, S. Shalman, Y. Yadlin 301

RNG- Based Q4- K-e Turbulence Model: Flow over a Backward Facing StepA. Yakhot, S. Rakib 304

Experimental Investigation of a Cross-Flow TurbineV.S. Obretenov 307

Nonlinear Local Solutions in Singularly Perturbed Planing FlowsG. M. Fridman 310

CHAPTER 17 Fracture and Fatigue

Stress State of Media with a Double Periodical System of Circular CracksI. Suzdalnitsky 313

The Effect of Crack Length Unevenness on Stress Intensity Factors Due to Autofrettage in Thick-Walled CylindersM. Perl, D. Alperowitz 315

A New Approach to Dynamic Fracture Toughness TestingD. Rittel, H. Maigre 319

Fatigue Lifetime with Load-Uncertainty Represented by a Convex ModelY.Ben-Haim 322

Simulation of Random Fatigue Crack GrowthR. Arone, Sh. Ustilovsky, L. Potepun 325

Statistical Fracture Mechanics - Basic Concepts and Numerical RealizationA. Chudnovsky, M. Gorelik 331

Experimental Fatigue Analysis of Polycarbonate TransparenciesY. Kin, L. Garrett, A. Mayer, R. McCarty 334

Modeling of Fatigue Strength of Structures Consisting of Several Equal ElementsL.A. Pereiaslavets 337

CHAPTER 18 Heat Transfer

Thermal Conductivity and Thermal Diffusivity ofMgO Heat Insulation in Range 400-2000 KE. Litovsky, M. Shapiro, A. Shavit, T. Litovsky, I. Yaniv, R. Cytermann 340

Experimental Study of Bubbles in Connective Subcooling of Water at Atmospheric PressureD. Faraji, Y. Bamea, M. Salcudean 342

An Analytical Solution to a Problem with Position Dependent Heat Transfer CoefficientS. Olek, E. Elias 345

Double Diffusive Marangoni ConvectionL. Braverman, A. Oron 348

Thermoelasticity Problem for a Multilayer Assembly Arising in Photothermal Reliability TestingT. Elperin, G. Rudin 351

Transient Performance and Optimization of Cooling Fins Subject to Various Initial ConditionsE. Assis, H. Kalman 353

Page 7: THE 25th ISRAEL CONFERENCE ON MECHANICAL ENGINEERING

Eddy Transport of Passive Scalar in /3-Plane Turbulent FlowS. Sukoriansky, B. Galperin 356

Segregation Kinetics Effect on Thermal Conductivity of Porous CeramicsT. Gambaryan, E. Litovsky, M. Shapiro, A. Shavit 357

CHAPTER 19 Lasers

Effect of Laser Beam Irradiation on AISI1045 SteelM. Riabkina-Fishman, J. Zahavi 360

A Comparison of Methods for Estimating the Weld Metal Cooling Rale in Laser WeldsI. Gilath, J.M. Signamarcheix , P. Bensussan 363

Efficient Metal Cutting with TEM 01 * Mode ofCO2 LaserA. Zajdman, O. Amichai, Y. Malinovich, G. Klumel, N. Danon 365

Information Data-Base System for Application of High Power Industrial LasersL. Gurvich, R. Kuiboer, E. Secemski, A. Shachrai 367

CHAPTER 20 Machining and Manufacturing

Precision Machining: Applications and Research Activities in Diamond TurningY. Shneor, E. Abramov, D. Eliezer 370

Measurement of Trimming Shock on Component LeadD. Wolfovitz 373

Cutting Regime Optimization for Machines with Numerical Program ControlM. Levin, A. Levin 376

Accuracy of Machines: Synthesis ofTopological-Kinematic and Functional Approaches

V.T. Portman 378

CHAPTER 21 Marine Sciences

Ship Hydrodynamics

Experiments on the Resistance of a Catamaran in Restricted Waters

L.J. Doctors 381Ship Motion Over a Non-Rigid Bed

G. Zilman, L. Kagan, T. Miloh 387Hybridization of Gliders and Semi-Gliders with Hydrofoils

I. Boguslavsky, A. Boguslavsky 390Estimation of Nonlinear Ocean Mooring System Parameters via the Hilbert Transform

O. Gottlieb, M.Feldman, S.C.S. Yim.S.Braun 393Nonlinear Evolution of a Directional Shoaling Wave Field

A. Sheremet, Y. Agnon, M. Stiassnie 396Water Waves Generated by Earthquakes

T. Gvelessiani ,G. Jinjikhashvily, L. Rozentur 399Two and Three Dimensional Numerical Modeling of Flow in Coastal Zone

M. Sladkevich, A.N. Militeev, H. Rubin, E. Kit 402

Marine Projects

An Integrated Ship Maneuvering SimulatorA. Tiano, G. Tacconi, F. Grassia, L. Minna, M. Anton 405

Information Management for Marine Engineering ProjectsY. Reich 408

Opportunities and Problems of Offshore Fish Farming Along the Mediterranean Coast of IsraelA. Biran, D. Wolf, R. Idan, D.S. Rosen 411

Page 8: THE 25th ISRAEL CONFERENCE ON MECHANICAL ENGINEERING

The Technology of Bridgestone Fish-Fanning Cages

J. Gunnarsson 414

CHAPTER 22 Materials

On Obtaining a Super Strength Fragmented Structure

I.I. Garbar, A.S. Kisel 418Metallurgical Failure Analysis - an Engineering Tool

Y. Gilad, L. Shikmanter, I. Eldror 421Measurement of Powder and Binder Properties which Determine Agglomerate Growth During Granulation

G.I. Tardos 424Ply (Sandwich) - High Alloy Steel DI-117

A. Sverdlin, V. Kondratenko, A. Tikhonov, S. Poliakov, S. Kasakov, I. Blagova, Y. Dimitriev 427CHAPTER 23 Mechatronics

Opportunities and Limitations of Existing Micro-Fabrication Methods for Micro-Electro-Mechanical DevicesI.R. Chertkow, A. Moshaiov, N.A. Travizki 431

Static Response of a Pneumatic Pulse Width ModulationB.Z.Maytal 443

Dynamic Modeling of an Elastic Beam with Piezoelectric ActuatorsM. Leibowitz 448

Steady State Analysis of Oscillations in Systems with Periodically Operated SwitchesA. Shenkman, M. Zarudi, I. Tchemina 451

Optimization of Electric Motors Used for Robots Working in a Hazardous EnvironmentE. Gabay, J. Bergman 454

CHAPTER 24 Metal Forming

Finite Element Simulation of Two Hot Metal Forming TechnologiesI. Dubrovsky, S. Genzelev 457

Some Advances in the Shakedown TheoryB.Druyanov 460

CHAPTER 25 Micromechanics

Composite Materials Based on Microfibrillar Network of a Rigid PolymerE. Amitay-Sadovsky, I. Tsabba, Y. Cohen 463

Thermal Fragmentation of Carbon Fibre Microcomposites: Compressive Strengths and Weibull ParametersJ. R. Wood, G. Marom 468

The Effect ofTranscrystalline Interfaces on the Micromechanics of Single Fiber CompositesA. Gati, H.D. Wagner 471

A Bessel - Function Analysis of Stress Transfer from the Matrix to the Fiber Through an Imperfect Interface:Application to the Fragmentation Test

J.A. Nairn 474

CHAPTER 26 Multiphase Flow

On the Hydraulic Transport of Solids in Pipes

P. Doron, D. Bamea 4 7 7

Experimental Studies of Direct Contact Boiling of a Volatile Liquid DropletS. Lesin, A. Baron, H. Branover, J.C. Merchuk 480

Non-Uniform Shrinkage of Char Particles Gasified in Electrodynamic BalanceLI. Kantorovich, E. Bar-Ziv 4 8 4

Page 9: THE 25th ISRAEL CONFERENCE ON MECHANICAL ENGINEERING

Fluidization Phenomena in Vibrated Beds of Solid ParticlesA. Goldshtein, M. Shapiro, L. Moldavsky, M. Fichman 487

Instability and Non-Uniformity of Two-Phase Flow in Parallel PipesM. Tshuva, Y. Taitel, D. Barnea 492

On Some Problems ofFluidized Bed ElectromechanicsV. Kogan, Y. Monin, G. Muchnik, B. Sandier 495

A Two-Phase Model of Fractional Recovery and Grain-Size Composition of the HydrocycloneSuspension Classification Products

G. Kosoy 498Direct Numerical Modeling of Two-Phase Turbulent Axially Symmetrical Jets

I. Antonov, M. Angelov 501

CHAPTER 27 Nonlinear Dynamics

Microstructures in Granular FlowsI.Goldhirsch 504

Stochastic Aspects of Nonlinear Dynamical SystemsS.C.S. Yim, H. Lin 507

Is it Possible to "Swing" the Nonlinear Oscillator?A. Erukhimov , A. Lemer, E. Pelinovsky, T. Talipova 510

The Onset of Spatial Instabilities in Parametrically Excited Evolution EquationsO.Gottlieb 512

CHAPTER 28 Nuclear Energy

Sensitivity of the AP600 Containment Response to Heat Transferred from its SurfaceD. Hasan, E. Elias, Y. Nekhamkin, I. Arshavski, E. Wacholder 515

Evaluating the Dry Air Passive Containment Cooling of the Westinghouse AP600 Nuclear ReactorY. Barnea, Y. Weiss, M. Haim, Y. Aharon 518

In Core Transients Calculations of an AP600 Reactor During a LOCA Using COBRA-IV-II. Silverman, M. Shapira, E. Elias 521

Analysis of the SPE1 in the PMK-NVH Facility with DSNPM. Shapira, D. Saphier 524

Induced Mixed Convection in a Hot Gas Duct?Y. Weiss, Y. Bamea, I. Shai 527

Criticality and Burnup Calculations of a Synthetic Core with Inserted Control RodsM. Caner, A.D. Krumbein, I. Silverman, M. Shapira 530

CHAPTER 29 Quality Control

A Quantitative Approach to Evaluate System Design Robustness and Stability Based on Qualification Test ResultsD. Tibi 533

A Non-Probabilistic Concept of ReliabilityY. Ben-Haim 536

Regress - A General Purpose Program for Least Squares AnalysisJ.R. Wolberg 538

Improvement of the Information Content of Statistical SamplingM. Levin, A. Levin 542

CHAPTER 30 Robotics

Robotic Scheduling Using Artificial Intelligence MethodsK. Preiss, O. Shai, R. Siman-Tov 544

Distributed Real Time Scheduling of Multi-Robot Manufacturing SystemsR. Tal, D. Gershon, G. Halevi 547

Y T

Page 10: THE 25th ISRAEL CONFERENCE ON MECHANICAL ENGINEERING

Robot with a Flexible and Light Arm - Based on Inflatable StructureN. Salomonski, M. Shoham, G. Grossman, Y. Koren 550

Three Phase Motions of Robotic ArmsS. Djerassi, M. Prinz 553

Fuzzy Logic Controller for Robotic Assembly TasksB. Radin, D. Gershon 557

A Design Approach for a State Estimator for a Multi-Link Revolute Rigid RobotA. Ailon, Y. Landau, M. Gladstein 561

Grasp Stability with Multi-Fingered HandV. Brodsky, M. Shoham 564

Geometric Representations of 2-Degrees of Freedom MechanismsG. Rodnay, R. Segev 567

Shape Memory Alloy Actuators for Robotic HandsL. Livshits, M. Shoham 570

CHAPTER 31 Solar Energy

Semi Fluidized Bed Solar Air HeaterE.Levy 573

A CAD Tool for Evaluating Mutual Shading Among Any Arbitrary Shaped StructuresE. Shaviv, S. Yezioro 580

Process Heat Generation in Industrial Buildings Using Solar Concentrating CollectorsK. Gommed, G. Grossman 583

Experimental and Theoretical Study of a Capillary Structured Solar Air HeaterB. Aronov, O. Mizrahi, Y. Zvirin, G. Grossman 586

CHAPTER 32 Solid Mechanics

Comments on a Symmetric Problem in Antiplane Linear ElasticityK. Schulgasser 589

Bounds and Estimates for the Effective Behavior of Polycrystals in Power-Law CreepG. deBotton 592

The Anisotropy of Elastic Fields in a Cubic Material Under Tension and the Interaction Between DilatingPrecipitates in a Cubic Material

R. Shneck, A. Brokman, M.P. Dariel 595Stability of Multiloaded Geometrically Nonlinear-Elastic, Linear Viscoelastic Beams and Circular Plates

M. Drawshi, G. Ciderbaum, D. Shilkrut 599An Elliptic Cylinder Containing a Pressurized Circular Hole: a Boundary Perturbation Solution

H. Cohen, R. Pames 6 0 4

On Some Axially Symmetric Problems with Plastic OrthotropyD. Durban, C. Roshu 6 0 7

Study of Microplasticity of SolidsV.V. Shpeizman 6 1 0

CHAPTER 33 Stability

Finite Element Solution of Geometrically Nonlinear Contact Problems of BeamsI. Doukhovny, D. Givoli 6 1 4

A Note on Convex Models of Uncertainty for Small Initial Imperfections of Non-Linear StructuresY. Ben-Haim 6 1 7

Divergence of a Cantilever Plate as a Nonconservative Problem of Elastic StabilityW.Dmitriyuk 6 2 0

Nonlinear Effects in the Behaviour of Cylindrical Shells Under Nonuniform Axial Compression. Experimental ResultsV. L. Krasovsky 6 2 3

Page 11: THE 25th ISRAEL CONFERENCE ON MECHANICAL ENGINEERING

Dynamical Stability of Viscoelastic Bodies Interacting with Fluid or GasP.A. Velmisov 626

CHAPTER 34 Transport Systems

Paniculate Solid Flow in ChuteD. Schlesinger 628

A New Approach to Strength of Single Particles and Bulk SolidsH. Kalman, D. Goder, G. Reshef 633

Mechanics of Dry Substances Transportation and Practical Developement of New Means of Transportation,Auxiliary Mechanisms, etc.

B.Eiderman, I. Resin 636Experimental Investigation of the Effect of Moisture Content and Particle Size on the PneumaticTransportability in the Dense Phase

D. Goder, H. Kalman, G. Ben-Dor, M. Rivkin 639

CHAPTER 35 Tribology

Model of Roller-Plane Type Tribosystem with Vibrogrooved RollerM. Levitin, B. Shamshidov, G. Halperin 642

Contact Mechanics in Wear Mapping of SteelsL. Rapoport 645

Wear Behavior of High Kinematic Pairs after Ion-NitridingS.I. Grunfeld, S. Moisa 648

A Study of Durability of Roll Presses for Compacting Powder MaterialsS. Gruzglin 651

Friction Reduction by Plasmo-Chemical Modification of Rubber SealsU. Kiselman, I. Malyatsky, V. Talrose 655

Sealing Solutions for Rotating Equipment in the Israeli IndustryR.A. Shellef 658

New Aluminium-Lead Alloys for Slide BearingsA. Shapiro, D. Kopeliowich, A. El-Boher, A. Meitav 661

Observations about Lubrication Mechanism in a Thin Section Precision Instrument Rolling Element Bearingwith Impregnated Phenolic Retainer

S. Ilani (Baum) 664High Dynamic Stability by Optimum Bearings Preload on Grinding Machines Main Spindles

M.D. Gafitanu, G.D. Hagiu 668

CHAPTER 36 Turbomachinery

Theoretical Prediction Model for Volumetric Efficiency of Variable Displacement Axial Piston PumpsY. Alper, R. Eshel, D. Wolf 671

Turbomachinery Efficiency Predictions - Centrifugal Pumps ApplicationsG.S. Heifetz, A. Friedman 674

About Lower Boundary of Gauss Distribution ApplicabilityA. Bolotnikov 680

Recirculation at Impeller Outlet of a Centrifugal PumpS. Yedidiah 683

TBROW - A CFD Tool For Turbomachinery DesignA. Arkadyev, D. Adler, P. Bar-Yoseph 687

Applications of Rapid Prototyping in Centrifugal Pump Design in Relation to Product DevelopementCycle Reduction

L.Nelik 690Investigation of a Combined Cycle Plant Using Coal

Y.M. Timnat, Y. Goldman 696

Page 12: THE 25th ISRAEL CONFERENCE ON MECHANICAL ENGINEERING

CHAPTER 37 Vibrations

Decomposition of Double-Component Vibration SignalsM. Feldman, S.Braun 700

Passive Vibroinsulation Systems - Design SimplificationsI. Kamovsky, V. Spivakovsky 703

Finite Element Modeling and Analysis of Rotordynamic SystemsY.J. Kligerman, M.S. Darlow 706

Study of Working Regimes ofVibroplatesL. Brindeu, N. Herisanu 709

Frequency-Spatial Anisotropy of Vibrations on the Surface of a GearboxY. Mikhlin, Y. Segal 712

Analysis of Friction Oscillations Based on Experiments on Bow-String InteractionV.Gorfinkel 715

Computational Simulation of Run-Away-Escapement MechanismA. Zehavi, Y. Rinott, I. Barkon 721

Vibration Analysis of Elastic-Viscoelastic StructuresR.G. Szumski, I. Green 724

A New Method for Sum of Principal Strain DeterminationP.D. Barsanescu 727

Method and Equipment for Flexibility and Geometric Deviation Measurement for the Blades of OneLarge Wind Turbine

T.Gh. Cioara, L. Bereteu, D.D. Dragomir 729

AUTHORS INDEX 732