Structural Analysis of Connecting Rod Using FEA / Sonlu Elemanlar Analizi ile Rod Bağlama Yapısal Analizi

Öz

In this research connecting rod is one of the most important part in engine assembly which transfers energy from piston to crankshaft and convert the linear, reciprocating motion of a piston into the rotary motion of a crankshaft. The connecting rod primarily undergoes tensile and compressive loading under engine cyclic process. The forces acting on connecting rod are:- forces due to maximum combustion pressure and force due to inertia of connecting rod and reciprocating mass. From the viewpoint of functionality, connecting rods must have the highest possible rigidity at the lowest weight. This project addresses the computation of the strength and distortion characteristics of a connecting rod. Finite element method is used to analyze the connecting rod’s stress and deformation using Ansys. For this case, a structural analysis will be performed. Ansys divides any analysis problem into three stages: preprocessing, solution and post-processing. In the first stage, the model to analyzed is imported after being designed in Solidworks in 3D and the type of finite elements are defined. In the second stage, the loads are implemented, the initial and boundary conditions are defined. The load is calculated. The axial compressive load is greater than the axial tensile load. Therefore, the design is only analyzed for the axial compressive loads. The last stage, post-processing, allows the user to view the results obtained from the analysis. Özet: Bu araştırma biyel bir krank mili dönme hareketi bir piston hareketini pistonlu, doğrusal krank mili ve piston dönüştürmek için enerji aktarır, motor montaj en önemli parçalarından biridir. Biyel öncelikle motor döngüsel süreci kapsamında çekme ve basma yükleme uğrar. Biyel etkiyen kuvvetler şunlardır: - maksimum yanma basıncı ve kuvvetinden dolayı kuvvetler nedeniyle biyel ve kitle pistonlu ataleti. Işlevsellik bakış açısından, bağlantı çubukları düşük ağırlık mümkün olan en yüksek sertliğe sahip olmalıdır. Bu proje, bir bağlantı çubuğunun kuvveti ve bozulma özellikleri hesaplama giderir. Sonlu elemanlar metodu Ansys kullanarak bağlantı çubuğu stres ve deformasyon analiz etmek için kullanılır. Bu durumda, bir yapısal analizi yapılacaktır. Önişleme, çözüm ve post-processing: Ansys üç aşamaya herhangi bir analiz problemi böler. İlk aşamada, analiz modeli 3D Solidworks dizayn edilen ve sonlu elemanlar tipi tanımlanmıştır sonra ithal edilmektedir. İkinci aşamada, yükler başlangıç ​​ve sınır koşulları tanımlanır, uygulanır. Yük hesaplanır. Eksenel basınç yükü eksenel çekme yükünden daha büyüktür. Bu nedenle, tasarım, sadece eksensel sıkıştırma yükleri için analiz edilmiştir. Son aşama, post-processing, analizinden elde edilen sonuçları görmek için izin verir.

Anahtar Kelimeler

• Connecting Rod,Structural Analysis,steel,Gas load,FEA etc / Rod,Yapısal Analiz,çelik,gaz yükü,FEA

Kaynakça

1. Afzal, A., 2004, “Fatigue Behavior and Life prediction of Forged Steel and PM Connecting Rods,” Master’s Thesis, University of Toledo.
2. Athavale, S. and Sajanpawar, P. R., 1991, “Studies on Some Modelling Aspects in the Finite Element Analysis of Small Gasoline Engine Components,” Small Engine Technology Conference Proceedings, Society of Automotive Engineers of Japan, Tokyo, pp. 379-389.
3. Balasubramaniam, B., Svoboda, M., and Bauer, W., 1991, “Structural optimization of I.C. engines subjected to mechanical and thermal loads,” Computer Methods in Applied Mechanics and Engineering, Vol. 89, pp. 337-360.
4. Bhandari, V. B., 1994, “Design of Machine Elements,” Tata McGraw-Hill. Clark, J. P., Field III, F. R., and Nallicheri, N. V., 1989, “Engine state-of-the-art a competitive assessment of steel, cost estimates and performance analysis,” Research Report BR 89-1, Automotive Applications Committee, American Iron and Steel Institute.
5. El-Sayed, M. E. M., and Lund, E. H., 1990, “Structural optimization with fatigue life constraints,” Engineering Fracture Mechanics, Vol. 37, No. 6, pp. 1149-1156.
6. Folgar, F., Wldrig, J. E., and Hunt, J. W., 1987, “Design, Fabrication and Performance of Fiber FP/Metal Matrix Composite Connecting Rods,” SAE Technical Paper Series 1987, Paper No. 870406.
7. Ferguson, C. R., 1986, “Internal Combustion Engines, Applied Thermosciences,” John Wiley and Sons, Inc.
8. Goenka, P. K. and Oh, K. P., 1986, “An Optimum Connecting Rod Design Study – A Lubrication Viewpoint,” Journal of Tribology, Transactions of ASME, July 1986, Vol. 108.

9. Gupta, R. K., 1993, “Recent Developments in Materials and Processes for Automotive Connecting rods,” SAE Technical Paper Series, Paper No. 930491.
10. Hippoliti, R., 1993, “FEM method for design and optimization of connecting rods for small two-stroke engines,” Small Engine Technology Conference, pp. 217-231.
11. Ishida, S., Hori, Y., Kinoshita, T., and Iwamoto, T., 1995, “Development of technique to measure stress on connecting rod during firing operation,” SAE 951797, pp. 1851-1856.
12. Ludenbach, B., 2002, “Manufacturing Processes and Characteristics of Forged Steel and Forged Powder Metal Connecting Rods,” 24th Forging Industry Technical Conference Proceedings, Forging Industry Association, October 14-16, Cleveland, OH.
13. Makino, T. and Koga, T., Feb 2002, “Crank Bearing Design Based on 3-D Elastohydrodynamic
14. Lubrication Theory,” Mitsubishi Heavy Industries, Ltd., Technical Review, Vol. 39, No. 1.
15. Norton R. L., 1996, “Machine Design-An Integrated Approach,” Prentice-Hall. Paek, S. Y., Ryou, H. S., Oh, J. S., and Choo, K. M., 1997, “Application of high performance powder metal connecting rod in V6 engine,” SAE Technical Paper Series, Paper No. 970427.
16. Pai, C. L., 1996, “The shape optimization of a connecting rod with fatigue lifeconstraint,” Int. J. of Materials and Product Technology, Vol. 11, No. 5-6, pp. 357-370. Park, H., Ko, Y. S., Jung, S. C., Song, B. T., Jun, Y. H., Lee, B. C., and Lim, J. D., 2003, “Development of Fracture Split Steel Connecting Rods,” SAE Technical Paper Series,Paper No. 2003-01-1309.
17. Rabb, R., 1996, “Fatigue failure of a connecting rod,” Engineering Failure Analysis, Vol. 3, No. 1, pp. 13-28.
18. Repgen, B., 1998, “Optimized Connecting Rods to Enable Higher Engine Performance and Cost Reduction,” SAE Technical Paper Series, Paper No. 980882. Rice, R. C., ed., “SAE Fatigue Design Handbook”, 3rd Edition, Society of Automotive Engineers, Warrendale, PA, 1997.
19. Sarihan, V. and Song, J., 1990, “Optimization of the Wrist Pin End of an Automobile Engine Connecting Rod With an Interference Fit,” Journal of Mechanical Design, Transactions of the ASME, Vol. 112, pp. 406-412.
20. Serag, S., Sevien, L., Sheha, G., and El-Beshtawi, I., 1989, “Optimal design of the connecting-rod”, Modelling, Simulation and Control, B, AMSE Press, Vol. 24, No. 3, pp. 49-63.
21. Shigley, J. E. and Mischke, C. R., 1989, “Mechanical Engineering Design,” 5th Edition, McGraw-Hill, Inc.
22. Socie, D. F. and Marquis, G. B., 2000, “Multiaxial Fatigue”, Society of AutomotiveEngineers, Warrendale, PA.158
23. Sonsino, C. M., and Esper, F. J., 1994, “Fatigue Design for PM Components,” European Powder Metallurgy Association (EPMA).
24. Stephens, R. I., Fatemi, A., Stephens, R. R., and Fuchs, H. O., 2000, “Metal Fatigue in Engineering,” 2nd Edition, John Wiley and Sons, Inc. Webster, W. D., Coffell R., and Alfaro D., 1983, “A Three Dimensional Finite Element Analysis of a High Speed Diesel Engine Connecting Rod,” SAE Technical Paper Series, Paper No. 831322.