DETERMINATION OF VEHICLE COMPONENTS FATIGUE LIFE BASED ON FEA METHOD AND EXPERIMENTAL ANALYSIS

Öz

In this study, construction and standardization of a track for performing fatigue and reliability test of light commercial vehicles is described. For the design and process verification of the company’s vehicles one test track is defined. A questionnaire was used to determine the average usage of light commercial vehicles in Turkey. Fatigue characteristics of Turkish roads were determined by analyzing fifty different roads and this article focuses on defining the load spectrum and equivalent fatigue damage of the leaf spring resulting from the accelerated test route. Fatigue analysis and estimated lifespan of the part were calculated using Finite Element Analyses and verified by the Palmgren-Miner rule. When the customer profile is taken into consideration; Turkish customer automotive usage profile, the aim of usage of this kind of vehicle (LCV), fatigue characteristics of Turkish roads for this vehicle were determined and around Bursa one accelerated test tracks were formed for the reliability and fatigue test for the related company, linear analysis executed on the FEA of the spring was more convenient were obtained

Anahtar Kelimeler

• Turkish automotive customer usage, Leaf spring, Finite element, Fatigue analysis, Palmgren-Miner rule

Kaynakça

1. Heyes,P., Lin, X.,Buczynski,A., Brown,M. (1997)’Application of Biaxial Plasticity and Damage
2. Modeling to the Life Prediction and Testing of Automotive Components ''5 th International Conference on Biaxial /Multiracial Fatigue and Fracture Cracow, Poland , Ncode International Limited. Paul,P.K.,Dunga,R.K. and Verma,A., Minakar ,A.V. and Raju,S.(2001),’Techniques for Accelerated Design
3. Validation of Tractor Chassis’, SAE Paper 2001-01
4. Bogsjö,K(2006)’Development of analysis tools and stochastic models of road profiles regarding their influence on heavy vehicle fatigue’, Vehicle system Dynamics ,44:1,780-790.
5. Kouta,R.,Play,D.,(1999)’Correlation procedures for fatigue life determination’, Journal of Mechanical Design,vol.121/289.
6. Lindström,F.,(2004)’Comparing roads profiles with vehicle perceived roughness’, Int. J. Vehcile Design ,Vol.36,Nos.2/3,pp.270-286.
7. Slingeland,A.Van Osten (2002)’A practical approach to virtual testing in automotive engineering’, Journal of
8. Engineering Design , 13:1,33-47. Medepalli,S.and Rao,R.,(2000)’Prediction of road loads for fatigue design –a sensitivity study’, Int,J.of

9. Vehicle Design,Vol.23,Nos.1/2,pp,161-175. D’aprile Filippo, Macni Marco, Bruder Thomas, Riefaoghe Christophe (2001),’’ Structural
10. Characterisation of Vehicle on a Rig Test Versus Different Road Profiles Analysis of Experimental Results, ATA vol.54 .n 7/8 Luglio –Agosto (LMS International, Belgium,-Memoria presentata al convegno florance Ata , Frienze). Fantacchiotti.,M., Vianello.M.,( 1994) ‘ Gradual
11. Improvement of the vehicle reliability up to the target value’ FIAT Auto S.p.A. Design Engineering Department, 4th International Conference ,Italy, Florence ATA New Design Frontiers for more efficient ,Reliable and Ecological Vehicles March 16-17-18
12. Şener,Ş.A., (2003),’ Hafif Bir Ticari Otonun Arka
13. Süspansiyon Yaprak Yayının Türkiye Koşullarına Göre Yorulma Analizi ‘ PhD thesis. Yıldız Technical University, Istanbul, Turkey. Maineri.G., Ensor D.F., (1999) ‘’ Case study
14. Complete customer usage profiling example raw data through track correlation to accelerated rig drive in ‘’4’’ days. AfIiliation : Iveco (Italy) - nCode (UK) Grubisic,V. ( 1994 ) ‘’ Determination of Load
15. Spectra for Design and Testing ‘’ Int.J.of Vehicle Design , Vol.15 nes.1/2 ,pp 8-26. Fantacchiotti,M., Vianello. M., (1992)
16. ‘’Accelerated reliability test for vehicles and correlation with actual use ‘’Proceeding of the 3rd International conference A.T.A. Innovation and Reliability in automotive design and testing ‘’ (Palazzo degli affari e palazzo dei congressi) Frienze ,Italy, April 8-9-10, ‘Integrated method to define the mission profile of a passenger car ’FIAT Auto S.p.A., Study Report ( in Italian) ASTM Standard E 1049-85 ‘’ Standard Practices for Cycle Counting in Fatigue Analysis’’,(Reapproved ) Philadelphia.
17. MSC nSoft v5.2 User Manuel (1999).
18. MSC Online Help Documentation (1999) Institute of Technology.
19. Pisarri.N.,(1998) Ricerca del profile di Missione vetture segment B Turchia, ‘’ Turkish Ciklo ‘Relazione prot.No.
20. Affidabilita’ e Terreni Prova Laboratorio Misure ‘’, Study Report (in Italian) Bishop.N.W.M., Kerr,S., Caserio,A.,(1999)’The
21. Fatigue Damage Caused to Vibrating Automotive Components ‘’,1 st MSC World- wide Automotive User Conference, September 20-22. Bishop, N.W.M., Lack,L.W., Li,T., Kerr,S.C. (1995) ‘’Analytical Fatigue Life Assessment of
22. Vibration Induced Fatigue Damage ‘’MSC World Users Conference, Universal City, A. MSC Patran(2001). Pro-Engineer (2001)
23. MSC Nastran Getting Starting User Guide (2001).
24. Bishop, N.W.M., Sherratt,F,( 2000 ) ‘Finite
25. Element Based Fatigue Calculations ‘NAFEMS LTD (International Association for the Engineering Analysis Community) www.nafems.org. MSC /FATIGUE V8 User Manuel, MSC Corporation, Los Angeles, A, (1998).
26. The Ncode book of Fatigue Theory (2000) Ncode
27. Technical Reference Book V:4.3. Document rel 1.0. Miner.M.A.,(1945)’Cumulative Damage in
28. Fatigue’, Journal of Applied mechanis,ASME,vol:12,pp.159-164. Şener,Ş.A., (2011),’ Vehicle component fatigue life definition based on the finite element method according to a customer usage profile ‘’ International
29. Journal of Automotive Technology ( in review)