This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Computational Simulation to Ascertain Hot Vibration Test Assembly for Converter Validation
Technical Paper
2015-26-0214
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Automotive exhaust system components are exposed to many types of vibrations, from simple sinusoidal to maximum random excitations. Computer-Aided engineering (CAE) plays an inevitable role in design and validation of hot vibration shaker assembly.
Key Life Test (KLT), an accelerated hot vibration durability test, is established to demonstrate the robustness of a catalytic converter. The conditions are chosen such a way that the parts which passes key life test will always pass in the field, whereas the parts which fail in the key life test need not necessarily fail in the field. The hot end system and the test assembly should survive in these aggressive targeted conditions. The test fixture should be much more robust than the components that it should not fail even if the components fail.
This paper reveals the computational methodology adopted to address the design, development and validation of the test assembly. The breakdown issue of the system due to oxidation, creep, plasticity, and mechanical load factors are discussed. Thermal expansion aggregated over the mechanical loading for different configurations helps in detecting the failure mechanism. A correlation factor of less than 5% error has been achieved. The correlation results and the suggested design modification with proper material selection which has been implemented with appropriate bellow selection along with its displacements and stresses are explained. Non-linear material properties are considered in analysis to achieve better accuracy towards reality conditions.
Authors
Topic
Citation
Rajadurai, S., Mani, G., Raja, K., Mohan, S. et al., "Computational Simulation to Ascertain Hot Vibration Test Assembly for Converter Validation," SAE Technical Paper 2015-26-0214, 2015, https://doi.org/10.4271/2015-26-0214.Also In
References
- Unruh , J. , Fox , D. , Locker , R. , and Sawyer , C. Catalytic Converter Mat Material Durability Measurement Under Controlled Thermal and Vibration Environments SAE Technical Paper 2000-01-0221 2000 10.4271/2000-01-0221
- Locker , R. and Sawyer , C. Low Temperature Catalytic Converter Durability SAE Technical Paper 2000-01-0220 2000 10.4271/2000-01-0220
- Locker , R. and Sawyer , C. Thermal Cyclic Evaluation of Catalytic Converter Mount Systems SAE Technical Paper 962078 1996 10.4271/962078
- De Coninck , F. , Desmet , W. , Sas , P. , Hansenne , E. et al. Development of a Procedure for Multi-Axial Road Load Reproductions on an Exhaust Test Rig SAE Technical Paper 2009-01-2030 2009 10.4271/2009-01-2030
- Cai C , Liaw PK , Ye M and Yu J Recent Developments in the Thermo-Mechanical Fatigue life prediction of super alloys JOM 51 4 1995
- Charklauk E , Bignonnet A , Constainescu A , and Dang Van K Fatigue Design of Structures Under Thermo-mechanical Loadings fatigue Fracture Engineering Material Structures 25 1199 1206 2002
- Wear and Corrosion 03.02 Annual Book of ASTM Standards ASTM
- Abaqus user manual version 6.10 2
- Smith G.V. Properties of Metals at Elevated Temperatures McGraw-Hill Book Company 1950
- Neu , R. W. and Sehitoglu , H. Thermo mechanical Fatigue, Oxidation, and Creep: Part II. Life Prediction Metallurgical Transactions 1989 20A 1769 1781
- Nippon Steel catalogue Automobile Materials 2000 9