Cast aluminum alloys are used for cylinder heads in internal combustion engines to meet low weight and high strength (lightweight) design requirements. In the combustion chamber, the alloy experiences harsh operating conditions; i.e., temperature variation, constrained thermal expansion, chemical reaction, corrosion, oxidation, and chemical deposition. Under these conditions, thermomechanical fatigue (TMF) damage arises in the form of mechanical damage, environmental (oxidation) damage, and creep damage.In the present work, several important properties that influence the TMF life of the cylinder head have been identified through TMF and finite element analysis (FEA). The results show that improving the strength at high temperatures helps improve TMF life on the exhaust side of the head. On the other hand, improving strength and ductility extend TMF life at low temperature on the intake side. Based on Neu-Sehitoglu TMF damage model, environmental (oxidation) damage is responsible for more than 80% of the total damage on the exhaust side. On the intake side, environmental factors are again a significant contributor to overall damage, but produce a smaller portion of total damage as compared to the exhaust side. Damage due to creep, relative to other categories of damage, is minimal and can therefore be neglected. Environmental (oxidation) damage is strongly influenced by the activation energy for oxidation. A small increase of the activation energy significantly increases the TMF life. The activation energy for oxidation is closely related to the chemical composition of the alloy and the kinetics of oxidation of each element in the alloy. FEA and TMF analysis facilitate optimized selection of target alloys that meet TMF life expectations as engine output increases.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Assessing Thermomechanical Fatigue of a Cast Aluminum Alloy Cylinder Head of an Internal Combustion Engine


    Weitere Titelangaben:

    Sae Int. J. Adv. and Curr. Prac. in Mobility


    Beteiligte:
    Chen, Jim (Autor:in) / Singh, Kanwerdip (Autor:in) / Zhang, Lin (Autor:in) / Annabattula, Pallavi (Autor:in) / Mirmiran, Seyed (Autor:in) / Gaikwad, Surendra (Autor:in) / Liu, Yi (Autor:in)

    Kongress:

    WCX SAE World Congress Experience ; 2020



    Erscheinungsdatum :

    2020-04-14


    Format / Umfang :

    9 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Thermomechanical Fatigue Life Predictions of Cast Aluminum Cylinder Heads Considering Defect Distribution

    Chang, Cherng-Chi / Wang, Qigui / Hazime, Radwan et al. | SAE Technical Papers | 2023


    HEAD COVER FOR INTERNAL COMBUSTION ENGINE CYLINDER HEAD

    ITO DAIZO / NONAKA ATSUSHI / OHTA KATSUHISA et al. | Europäisches Patentamt | 2020

    Freier Zugriff

    Head cover for internal combustion engine cylinder head

    ITO DAIZO / NONAKA ATSUSHI / OHTA KATSUHISA et al. | Europäisches Patentamt | 2021

    Freier Zugriff

    CYLINDER HEAD STRUCTURE IN INTERNAL COMBUSTION ENGINE

    SASAKI REI | Europäisches Patentamt | 2015

    Freier Zugriff

    Thermomechanical Analysis of an Engine Cylinder Head

    Shojaefard, M H / Ghaffarpour, M R / Noorpoor, A R et al. | SAGE Publications | 2006