Thermo-mechanical fatigue simulation of exhaust manifolds
الموضوعات : فصلنامه شبیه سازی و تحلیل تکنولوژی های نوین در مهندسی مکانیک
1 - Assistant Professor, Sama Unit, Varamin Unit
الکلمات المفتاحية: Finite Element Analysis, thermo-mechanical fatigue, exhaust manifolds and confluence cracks,
ملخص المقالة :
Loading conditions and complex geometry have led the exhaust manifolds heads to become the most challenging parts of diesel engines. Thermal fatigue failure of the engine components easily happens due to excessive temperature gradient and thermal stress. Modern exhaust systems must withstand severe cyclic mechanical and thermal loads throughout the whole life cycle. This study focuses on the Thermo-mechanical Fatigue (TMF) analysis for exhaust manifolds. The three-dimensional model of the exhaust manifolds was simulated in abaqus software and a chaboche model was utilized to investigate the elastic and plastic behavior of the exhaust manifolds. The numerical results showed that the temperature and thermal stresses have the most critical values at the confluence region of the exhaust manifolds. This area was under the cyclic tensile and compressive stress and then is under low cycle fatigue. After several cycles the fatigue cracks will appear in this region.The lifetime of this part can be determined through finite element analysis instead of experimental tests.
[1] L. Meda, Y. Shu, and M. Romzek,“Exhaust System Manifold Development,” SAE Technical Paper No.2012-01-0643, 2012.
[2] P-O. Santacreu, L. Faivre, and A. Acher, “Life Prediction Approach for Stainless Steel Exhaust Manifold,” SAE Technical Paper No.2012-01-0732, 2012.
[3] Z. Yan, L. Zhien, W. Xiaomin, H. Zheng, and Y. Xu, “Cracking failure analysis and optimization on exhaust manifold of engine with CFD-FEA coupling, ” SAE Technical Paper No. 2014-01-1710, 2014.
[4] S. Sissaa, M. Giacopinia, and R. Rosia, “Low-Cycle Thermal Fatigue and High-Cycle Vibration Fatigue Life Estimation of a Diesel Engine Exhaust Manifold, ” Journal of Procedia Engineering, vol. 74 , 2014, pp. 105-112.
[5] M. Chen, Y. Wang, W. Wu, and J. Xin, “Design of the Exhaust Manifold of a Turbo Charged Gasoline Engine Based on a Transient Thermal Mechanical Analysis Approach,” SAE Technical Paper No.2014-01-2882, 2014.
[6] L. Zhien, X. Wang Z. Yan, X. Li, and Y. Xu, “Study on the Unsteady Heat Transfer of Engine Exhaust Manifold Based on the Analysis Method of Serial, ” SAE Technical Paper No.2014-01-1711, 2014.
[7] X. Li, W. Wang, X. Zou, Z. Zhang, W. Zhang, S. Zhang, T. Chen, Y. Cao, and Y. Chen, “Simulation and Test Research for Integrated Exhaust Manifold and Hot End Durability,” SAE Technical Paper No .2017-01-2432, 2017.
[8] X. Liu, G. Quan, X. Wu, Z. Zhang, and C. Sloss, “Simulation of Thermomechanical Fatigue of Ductile Cast Iron and Lifetime Calculation,” SAE Technical Paper No.2015-01-0552, 2015.
[9] A-D. Azevedo Cardoso, and D. Claudio Andreatta, “Thermomechanical Analysis of Diesel Engine Exhaust Manifold,” SAE Technical Paper No.2016-36-0258, 2016.
[10] X. Wu, T. Quan, and C. Sloss, “Failure Mechanisms and Damage Model of Ductile Cast Iron under Low-Cycle Fatigue Conditions,” SAENo.Technical Paper 2013-01-0391, 2013.
[11] C. Delprete, R. Sesana, “Experimental characterization of a Si–Mo–Cr ductile cast iron,” Journal of Materials and Design, vol. 57, 2014, pp. 528-537.
[12] H. Yamagata, The science and technology of materials in automotive engines, Woodhead Publishing Limited Cambridge, UK, 2005.
[13] A.A Partoaa, M. Abdolzadeh, and M. Rezaeizadeh, “Effect of fin attachment on thermal stress reduction of exhaust manifold of an off road diesel engine,” DOI: 10.1007/s11771-017-3457-1, 2017, pp. 546-559
[14] F. Ahmad, V. Tomer, A. Kumar, and P.P. Patil, “FEA Simulation Based Thermo-mechanical Analysis of Tractor Exhaust Manifold,” Springer India, CAD/CAM, Robotics and Factories of the Future, Lecture Notes in Mechanical Engineering, DOI 10.1007/978-81-322-2740-3-18 , 2016, pp. 173-181.
[15] M. Nour, H. Kosaka, M. Bady, S. Sato, and A.K. Abdel-Rahman, “Combustion and emission characteristics of DI diesel engine fuelled by ethanol injected into the exhaust manifold,” Fuel Processing Technology, vol. 164, 2017, pp. 33–50
[16] F. Szmytka, P. Michaud, L. Rémy, and A. Köster, “Thermo-mechanical fatigue resistance characterization and materials ranking from heat-flux-controlled tests. Application to cast-irons for automotive exhaust part,” Journal of Fatigue, vol. 55, 2013, pp. 136–146
[17] A. Benoit, M.H. Maitournam, L. Rémy, and Y. Oger, “Cyclic behaviour of structures under thermomechanical loadings: Application to exhaust manifolds,” Journal of Fatigue, vol. 38, 2012, pp. 65–74
[18] M. Mashayekhi, A. Taghipour, A. Askari, and M. Farzin, “Continuum damage mechanics application in low-cycle thermal fatigue,” International Journal of Damage Mechanics, vol. 22, no.2, 2012. pp. 285-300.
[19] M.A.Salehnejad, A. Mohammadi, M. Rezaei, and H. Ahangari, “Cracking failure analysis of an engine exhaust manifold at high temperatures based on critical fracture toughness and FE simulation approach,” Journal of Engineering Fracture Mechanics, DOI.org/10.1016/j.engfracmech.2019.02.005, 2019, pp. 1-54
[20] H.Mahabadipour, R.S. Krishnan, and K.K. Srinivasan, “Investigation of exhaust flow and exergy fluctuations in a diesel engine,” DOI .org/10.1016/j.applthermaleng.2018.10.109, Applied Thermal Engineering, 2018, pp. 1-37
[21] S. Qiu, Z.C Yuan, R.X. Fan, and J. Liu, “Effects of exhaust manifold with different structures on sound orderdistribution in exhaust system of four-cylinder engine, ” Journal of Applied Acoustics, vol.145, 2019, pp. 176–183
[22] S. Vyas, A. Patidar, S. Kandreegula, and U. Gupta, “Multi-Physics Simulation of 6-Cylinder Diesel Engine Exhaust Manifold for Investigation of Thermo-Mechanical Stresses,” SAE Technical Paper No.2015-26-0182, 2015.
[23] A. El-Sharkawy, A. Sami, A. Hekal, D. Arora, and M. Khandaker, “Transient Modeling of Vehicle Exhaust Surface Temperature,” SAE No.Technical Paper 2016-01-0280, 2016.
[24] G.M. Castro Güiza, W. Hormaza, R. Andres, E. Galvis, and L.M. Méndez Moreno, “Bending overload and thermal fatigue fractures in a cast exhaust Manifold, ” Journal of Engineering Failure Analysis, doi: 10.1016/j.engfailanal.2017.08.016, 2017.
[25] M. Ekström, A. Thibblin, A. Tjernberg, C. Blomqvist, and S. Jonsson, “Evaluation of internal thermal barrier coatings for exhaust manifolds, ”Journal of surface & coating technology, vol. 272, 2015, pp. 198-212
[26] J. Lemaitre, and J. Chaboche, Mechanics of Solid Materials, Cambridge University Press, Cambridge, 1990.
[27] J. L. Chaboche, “Time-independent constitutive theories for cyclic plasticity, ” International Journal of Plasticity, vol. 2, No. 2, 1986, pp. 149–188
[28] J. L. Chaboche, “A review of some plasticity and viscoplasticity constitutive theories,” International Journal of Plasticity, vol. 24, 2008, pp. 1642–1693
[29] A. Deshpande, S.B. Leen, and T.H. Hyde, “Experimental and numerical characterization of the cyclic thermo-mechanical behavior of a high temperature forming tool alloy,” ASME Journal of Manufacturing Science and Engineering, vol. 132, 2010, pp. 1-12.
[30] J.B. Heywood, Internal combustion engine fundamentals, McGraw-Hill press, 1998.
[31] A.C. Alkidas, P.A. Battiston, and D.J. Kapparos, “Thermal Studies in the Exhaust System of a Diesel-Powered Light-Duty Vehicle,” SAE Technical Paper No.2004-01-0050, 2004.
[32] Y. He, P. Battiston, and A. Alkidas, “Thermal Studies in the Exhaust Manifold of a Turbocharged V6 Diesel Engine Operating Under Steady-State Conditions,” SAE Technical Paper No.2006-01-0688, 2006.
[33] G.Q. Sun, and D.G Shang, “Prediction Of Fatigue Lifetime Under Multiaxial Cyclic Loading Using Finite Element Analysis,” Journal of Material and Design, vol. 31, 2010, pp. 126-133.
[34] ABAQUS/CAE(v6.13-1), User’ s Manual , 2013.
[35] N. Mamiya, T. Masuda, and Y. Yasushi Noda, 2002, “Thermal Fatigue Life of Exhaust ManifoldsPredicted by Simulation,” SAE Technical Paper No.2002-01-0854, 2002.
