A combined experimental and analytical approach was followed in this work to study stress distributions and causes of failure in diesel cylinder heads under steady-state and transient operation. Experimental studies were conducted first to measure temperatures, heat fluxes and stresses under a series of steady-state operating conditions. Furthermore, by placing high temperature strain gages within the thermal penetration depth of the cylinder head, the effect of thermal shock loading under rapid transients was studied. A comparison of our steady-state and transient measurements suggests that the steady-state temperature gradients and the level of temperatures are the primary causes of thermal fatigue in cast-iron cylinder heads. Subsequently, a finite element analysis was conducted to predict the detailed steady-state temperature and stress distributions within the cylinder head. A comparison of the predicted steady-state temperatures and stresses compared well with our measurements. Furthermore, the predicted location of the crack initiation point correlated well with experimental observations. This suggests that a validated steady-state FEM stress analysis can play a very effective role in the rapid prototyping of cast-iron cylinder heads.


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    Titel :

    Measurements and Predictions of Steady-State and Transient Stress Distributions in a Diesel Engine Cylinder Head


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Assanis, Dennis N. (Autor:in) / Lee, Jinho (Autor:in) / Chun, Kwang Min (Autor:in) / Lee, Kyo Seung (Autor:in)

    Kongress:

    International Congress & Exposition ; 1999



    Erscheinungsdatum :

    1999-03-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch






    Measurements and Predictions of Steady-State and Transient Stress Distributions in a Diesel Engine Cylinder Head

    Kyo Seung Lee / Assanis, D. N. / Lee, J. et al. | British Library Conference Proceedings | 1999



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