The endurance life of an engine crankshaft is closely related to its fatigue strength, in addition to other material properties and shape parameters. Deep rolling, moreover, enhances the fatigue limit by applying compressive residual stress within the fillet radius area as a major surface hardening technique. The objective of this research is to maximize engine fatigue life through crankshaft design optimization by quantifying fatigue strength for microalloyed steels versus a Cr-Mo alloy steel, and to examine the effects of deep rolling load and rolled fillet geometry.Fatigue tests have been made with standard rotary bending test samples from both bar and forged blanks. Rig tests for actual crankshafts have been made to show how the fatigue strength correlates with different sample types. A correlation of stress distribution with bending moment was demonstrated by applying a strain gauging technique on crankshaft specimens. Therefore, an analysis of combined stresses could be made by considering the effect of static residual stress in addition to the applied dynamic bending stress.A correlation of rolling load, surface hardness as well as residual stress distribution was observed by using an X-ray diffraction technique. Optimum conditions for rolling load, fillet geometry and material were identified. Consequently, these results were adapted to CAE analysis database to enable an optimization of safety factors.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Fatigue Strength and Residual Stress Analysis of Deep Rolled Crankshafts


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Bhan, Hyoung Oh (Autor:in) / Park, Hyounsoo (Autor:in) / Park, Jeen Woo (Autor:in) / Lim, Jong Dae (Autor:in) / Ko, Young Sang (Autor:in)

    Kongress:

    SAE 2005 World Congress & Exhibition ; 2005



    Erscheinungsdatum :

    11.04.2005




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Fatigue strength and residual stress analysis of deep rolled crankshafts

    Ko,Y.S. / Park,J.W. / Bhan,H.O. et al. | Kraftfahrwesen | 2005


    2005-01-0988 Fatigue Strength and Residual Stress Analysis of Deep Rolled Crankshafts

    Ko, Y. S. / Park, J. W. / Bhan, H. O. et al. | British Library Conference Proceedings | 2005


    Fatigue strength of nodular iron crankshafts

    Gligorijevic,R. / Jevtic,J. / Vidanovic,G. et al. | Kraftfahrwesen | 2001


    Fatigue Strength of Nodular Iron Crankshafts

    Vidanovic, G. / Jevtic, J. / Radojevic, N. et al. | SAE Technical Papers | 2001


    Audi Deep Rolls Crankshafts for Strength

    Behne,T.A. / Audi | Kraftfahrwesen | 1985