Damage Operator‐Based Lifetime Calculation Under Thermomechanical Fatigue and Creep for Application on Uginox F12T EN 1.4512 Exhaust Downpipes |
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| Authors: | M. Nagode D. Šeruga M. Hack E. Hansenne |
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| Affiliation: | 1. Faculty of Mechanical Engineering, University of Ljubljana, A?ker?eva 6, 1000 Ljubljana, Slovenia;2. LMS Deutschland GmbH, Luxemburger Str. 7, 67657 Kaiserslautern, Germany;3. BOSAL Research N.V., – Plant 48, Dellestraat 20, B‐3560 Lummen, Belgium |
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| Abstract: | Abstract: The article focuses on the application of a recently developed damage operator‐based lifetime calculation to a thermomechanically loaded exhaust downpipe. The damage operator approach enabling online continuous damage calculations for isothermal and non‐isothermal loading with mean stress corrections is reviewed. The article also highlights an extension of the strain‐life approach to take into account viscoplastic effects and creep. The transient results from thermal and structural analyses using finite element analyses have been applied to the exhaust downpipe in LMS Virtual.Lab and the damage predicted. Tested exhaust downpipes were then subjected to the same loading conditions as in the calculation, and load cycles were repeated up to the point of failure. Simulated and test results are comparable. |
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| Keywords: | creep downpipe exhaust fatigue hysteresis operator thermomechanical fatigue viscoplasticity |
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