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FEM based Approach for Design and Development of Exhaust System Flex Connector and Experimentally Validated
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 28, 2017 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Flex Connectors are intended for mitigating the relative movement of exhaust system components along the axis of the system arising from the thermal expansion due to intermittent engine operation. Flex connectors must not be installed in locations, where they will be subjected to destructive vibration. Hence, the stiffness of the flex connector plays an important role, while designing or selecting the right design.
It consists of a multi-ply bellows combined with an inside and an outside steel braid. The liner is included to reduce the temperature of the bellows and improve flow conditions. The braid is included for mechanical protection and to limit the possible extension of the joint. It has only axial translational motion.
Instead of conventional approach, Finite Element Method has been adopted to align the project time plan (design and development time), to predict the static and dynamic stress levels along with the vertical, lateral and torsional frequencies for defining the design parameters (stiffness) of the flex connector suitable for the operating environment. Then, this flex connector has been tested under VECV standard durability cycles - to measure strain values and frequencies at defined locations and validated with the CAE results.
The FE simulation have helped us in selecting the right parameters for the design and ensure First Time Right at the development phase. It implies reduction in number of physical trails and thereby achieving considerable time and cost saving for design and development phase.
CitationKandreegula, S., Mukherjee, S., Jain, R., Prasad, S. et al., "FEM based Approach for Design and Development of Exhaust System Flex Connector and Experimentally Validated," SAE Technical Paper 2017-01-1079, 2017, https://doi.org/10.4271/2017-01-1079.
Data Sets - Support Documents
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- Pang, J. and Qatu, M., "Exhaust System Robustness Analysis Due to Flex Decoupler Stiffness Variation," SAE Technical Paper 2003-01-1649, 2003, doi:10.4271/2003-01-1649
- Lauwagie, T. Strobbe, J. Dascotte, E. Monteagudo M., “Optimization of the Dynamic Response of a Complete Exhaust System” February 9-12, 2009 Orlando, Florida USA ©2009
- Ghasemi, A., Dong, M., Meda, L., and Romzek, M., "CAE Dynamic Durability Simulation of Exhaust System," SAE Technical Paper 2013-01-0510, 2013, doi:10.4271/2013-01-0510
- Rajadurai, S. Suresh N., “Systematic FEA Study of Passenger Car Exhaust System Using Radioss”.
- Vora, K., Patil, A., and Halbe, V., "A Systems Approach to Automotive Exhaust System Development," SAE Technical Paper 2003-26-0029, 2003, doi:10.4271/2003-26-0029
- Soundararajan, S., "A Finite Element Methodology to Design and Validate the Performance of an Automotive Exhaust System," SAE Technical Paper 2012-28-0019, 2012, doi:10.4271/2012-28-0019
- Meda, L., Lawrenz, H., Romzek, M., and Gilmer, D., "Structural Durability Evaluation of Exhaust System Components," SAE Technical Paper doi:2007-01-0467, 2007, 10.4271/2007-01-0467
- Patil, S. and Katkar, V., "Approach for Dynamic Analysis of Automotive Exhaust System," SAE Technical Paper 2008-01-2666, 2008, doi:10.4271/2008-01-2666