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SMAT2008V39ON THE RESISTANCE OF METALIC HELICAL SPRINGS THAT EQUIPROAD AND RAILWAY VEHICLESAurelia Tănăsoiu, Ion CopaciMetallic elastic elements, under the form of helical springs, torsion springs and laminated springs as well asring-type RINGFEDER springs are largely utilized on road and railway vehicles, as suspension elements.The paper mainly discusses the determination, using the Finite Element Method, of the stress state, usingadequate software, the ALGOR program.The study was conducted on the metallic helical spring with bar diameter of31mm used on the Y25 Lsdi bogie in order to increase axle load from 200 kN/axle to 225 kN/axle.In the spatial stress state, the main stresses were determined (σ 1 , σ 2 , σ 3 ), the equivalent stress according to thevon Mises criterion and the stress tensor. It is observed that the material, 50CrV4 steel, has the mechanicalcharacteristics which can answer existing demands determined from use and corresponding to the computed stressstate.Keywords: von Mises stress, ALGOR Software, endurance testing.1 Aurelia Tănăsoiu, Ș.l. dr. Ing. , Universitatea “Aurel Vlaicu” Arad, Facultatea de Inginerie,aurelia.tanasoiu@gmail.com, +40-257-250389.2 Ion Copaci, Prof. dr. ing., Universitatea “Aurel Vlaicu” Arad, Facultatea de Inginerie, ioncopaci@gmail.com, +40-257-250389.SMAT2008V40COMPARATION BETWEEN TWO MATHEMATICAL MODEL FORVEHICLE STABILITY STUDY TAKEN AND WITHOUT TAKEN INCONSIDERATION THE DRIVE ACTIONOŢĂT Victor, SIMNICEANU Loreta, NEAGOE D-tru, BOGDAN Mihaela, DINCĂ LiviuUniversitatea din CraiovaAbstract: The paper presents a comparison between two mathematical models realized by using the experimentalresults and theoretical results. To highlight the impact of drivers intervention on the stability of the vehicle, isconsidered two mathematical models: taking and without taking into account the driver's action.Keywords: mathematical model, drive action, compare.Loreta Simniceanu , PhD, Lecturer, University of Craiova, Faculty of Mechanic, lsimniceanu@yahoo.com, 0251544621Victor Oţăt , PhD, Profesor, University of Craiova , Faculty of Mechanic, Craiova,otatvictor@yahoo.com, 0251544621Dumitru Neagoe, PhD, Senior Lecturer, University of Craiova, Faculty of Mechanic, Craiova,departarmia@yahoo.com, 0251544621Mihaela Bogdan, PhD, Lecturer, University of Craiova, Faculty of Mechanic, Craiova, bogdanmihaela@k.ro,025154462124
SMAT2008V41THE VALIDATION BY EXPERIMENTAL TEST OF MODEL ANALYSISSTABILITY WITH CONSIDERING THE DRIVE ACTIONNEAGOE D-tru, SIMNICEANU Loreta, OŢĂT Victor ,BOGDAN Mihaela, TROTEA MarioUniversitatea din CraiovaAbstract: For stability analyses vehicles are proposed mathematical models with a greater or less thanapproximation of the real movement. The paper presents a comparison between calculations and experimentalsolutions of a theoretical model of stability analysis with consideration of action driver. This comparison validates themathematical model proposed.Keywords: stability analysis, test results, theoretical results, comparison.Loreta Simniceanu , PhD, Lecturer, University of Craiova, Faculty of Mechanic, lsimniceanu@yahoo.com, 0251544621Victor Oţăt , PhD, Profesor, University of Craiova , Faculty of Mechanic, Craiova,otatvictor@yahoo.com, 0251544621Dumitru Neagoe, PhD, Senior Lecturer, University of Craiova, Faculty of Mechanic, Craiova,departarmia@yahoo.com, 0251544621Mihaela Bogdan, PhD, Lecturer, University of Craiova, Faculty of Mechanic, Craiova, bogdanmihaela@k.ro,0251544621Mario Trotea, Assistant, University of Craiova, Faculty of Mechanic, Craiova, mtrotea@yahoo.comSMAT2008V42MODELS FOR CAR STABILITY ANALYZES WITH AND WITHOUTTAKING INTO CONSIDERATION THE DRIVERS ACTIONLoreta SIMNICEANU, Victor OŢĂT , Dumitru NEAGOE,Mihaela BOGDAN, Mario TROTEAUniversitatea din CraiovaAbstract: This paper presents some researches regarding the stability of automotive, a plan model of automotive istaking into account. For this automotives plan model two mathematical models are proposed: with and without takinginto consideration the drivers action. Those systems are a nonlinear differential equations form, which can be used inthe vehicles stability analysesKeywords: automotive, plan model, mathematical model, nonlinear differential equations, stabilityLoreta Simniceanu , PhD, Lecturer, University of Craiova, Faculty of Mechanic, lsimniceanuîyahoo.com, 0251544621Victor Oţăt , PhD, Profesor, University of Craiova , Faculty of Mechanic, Craiova,otatvictor@yahoo.com, 0251544621Dumitru Neagoe, PhD, Senior Lecturer, University of Craiova, Faculty of Mechanic, Craiova,departarmia@yahoo.com, 0251544621Mihaela Bogdan, PhD, Lecturer, University of Craiova, Faculty of Mechanic, Craiova, bogdanmihaelaîk.ro,0251544621Mario Trotea, Assistant, University of Craiova, Faculty of Mechanic, Craiova,mtrotea@yahoo.com25
Page 7 and 8: SMAT2008V14AUTOMOTIVE DEPORTANTE WI
Page 9 and 10: SMAT2008V18ROAD DYNAMIC EXPERIMENTA
Page 11 and 12: SMAT2008V22STUDY CONCERNING FRACTIO
Page 13 and 14: Consideration on the distribution o
Page 15 and 16: SMAT2008V30THE MODAL POWER ASPECTS
Page 17 and 18: SMAT2008V33THE OPTIMIZATION OF THE
Page 19: SMAT2008V37COUPLED MULTIBODY - FINI
Page 23 and 24: SMAT2008V45GENERAL ALGORITHM FOR DE
Page 25 and 26: 29SMAT2008V48DEVELOPMENT OF INFORMA
Page 27 and 28: SMAT2008 V52THE ACTUAL STATE OF DEV
Page 29 and 30: SMAT2008V57COMPARATIVE PRACTICAL ST
Page 31 and 32: SMAT2008T01INVESTIGATIONS CONCERNIN
Page 33 and 34: SMAT2008T05NO-TILL RESEARCH RESULTS
Page 35 and 36: SMAT2008T10THE FINIT ELEMENT METHOD
Page 37 and 38: SMAT2008E03THE INFLUENCE OF BIODIES
Page 39 and 40: SMAT2008E06FUNCTIONING CONDITIONS O
Page 41 and 42: SMAT2008E09EXPERIMENTAL RESULTS CON
Page 43 and 44: SMAT2008E11THE MATHEMATICAL SIMULAT
Page 45 and 46: SMAT2008E15THE LPG USE IN DIESEL EN
Page 47 and 48: SMAT2008E20EXAUST EMISSIONS OF DIFF
Page 49 and 50: SMAT2008E24VVA FOR A SPARK IGNITION
Page 51 and 52: SMAT2008E27ESTIMATION BY CALCULATIO
Page 53 and 54: SMAT2008M04INFLUENCE OF THE PARTICL
Page 55 and 56: STUDY ON VEGETAL OILS CHARACTERISTI
Page 57 and 58: SMAT2008M13NITINOL: PROPERTIES AND
Page 59 and 60: SMAT2008M17EFFECTS OF QUENCING AND
Page 61 and 62: SMAT2008M21CONSIDERATIONS ON THE CO
Page 63 and 64: SMAT2008M25ABOUT OF THE INFLUENCE O
Page 65 and 66: SMAT2008M29ERROR ON THE GEOMETRICAL
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Page 69 and 70: SMAT2008M37EFFECT OF STIFFNESS UNCE
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SMAT2008M41STEADY-HAND MANIPULATOR
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SMAT2008R03URBAN AREAS CHEMICAL POL
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SMAT2008R07RESEARCH REGARDING THE V
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SMAT2008R11ANALYSIS REGARDING THE P
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SMAT2008R15VEHICLE DYNAMIC BEHAVIOU
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SMAT2008R18STUDY REGARDING THE ROAD
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SMAT2008R20INFLUENCE OF THE HUMAN E
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SMAT2008R24RESEARCH CONCERNING DETE
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