Bonded piston seals (BPSs) which consist of metal ring and rubber lips are used as hydraulic pistons for Automatic Transmission (AT) or Continuously Variable Transmission (CVT). While engaging clutches, BPSs preserve the hydraulic pressure, therefore it is necessary to endure number of cyclic pressure through the life. This paper describes a reliable design method of BPSs with taking account of the influence of residual stress on the fatigue limit of the metal ring. A new plastic-elastic analysis model considering Bauschinger effect is applied in order to estimate the residual stress, which generates due to metal forming process. Validation for calculated residual stress is done by X-ray diffract meter. A proofed BPS design calculated with this new FEM model shows longer fatigue life than conventional design.


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    Title :

    A Study on Durability of Bonded Piston Seals Considering Forming Process


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2013 World Congress & Exhibition ; 2013



    Publication date :

    2013-04-08




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    A Study on Durability of Bonded Piston Seals Considering Forming Process

    Takao, Y. / Takeno, K. / Society of Automotive Engineers | British Library Conference Proceedings | 2013


    Development of bonded piston seals

    Komiya,E. / Yomogida,M. / Kanzaki,Y. et al. | Automotive engineering | 2001


    Development of Bonded Piston Seals

    Komiya, E. / Yomogida, M. / Kanzaki, Y. et al. | British Library Conference Proceedings | 2001


    Development of Bonded Piston Seals

    Komiya, Eiji / Nishina, Hironori / Yomogida, Michinori et al. | SAE Technical Papers | 2001