The life prediction of mechanical components in presence of Thermo-Mechanical Fatigue (TMF) is a crucial issue of the design activity. In the combustion engine, that action looks rather difficult because of a superposition of several damage phenomena. Some TMF models are currently available in the literature, but they include many parameters, whose calibration usually requires an onerous testing activity. Therefore, industry requires an assessment of those techniques, to be implemented through some simplified and reliable procedures. In this paper, the prediction of TMF life of a lightweight engine component is based on a new procedure, exploiting the isothermal Low-Cycle Fatigue (LCF) and creep tests, some theoretical approaches applied to TMF and numerical modeling. The A356 Aluminum Alloy is analyzed, as an example of strategic material used to design the new automotive lightweight engines. The calibration of TMF models based on the isothermal LCF and creep tests was found reliable. The fatigue life prediction looks compatible with some preliminary experimental results. Therefore, the proposed approach is suitable to simplify the design procedure, to decrease costs, especially related to testing, and to perform a preliminary trade-off activity of the engine layout.
LCF/TMF Model Based Approach for the Prediction of Fatigue Life of Components in Lightweight Automotive Engines
Int.J Automot. Technol.
International Journal of Automotive Technology ; 21 , 2 ; 297-308
2020-04-01
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Holistic life cycle approach for lightweight automotive components
Tema Archiv | 2014
|FATIGUE LIFE PREDICTION OF HIGH TEMPERATURE COMPONENTS IN COMBUSTION ENGINES
British Library Conference Proceedings | 2009
|Systematic Work Flow for Fatigue Life Prediction of Automotive Components
SAE Technical Papers | 2019
|Prediction of duration of life of automotive components under thermomechanical fatigue
British Library Conference Proceedings | 2002
|Random Vibration Fatigue Evaluation of Plastic Components in Automotive Engines
SAE Technical Papers | 2022
|