The Swedish fighter aircraft 37 Viggen was reassessed in terms of damage tolerance evaluation. Four versions of the main wing attachment frame and some components in the fin were subjected to detailed analyses and damage tolerance testing. It was necassary to perform very extensive finite element analyses, in order to get accurate stress distribution in critical sections for subsequent evaluation of three dimensional stress intensity factors. The stress analyses were mainly checked on the basis of traditional static and fatigue testing results available from the design phase of the aircraft. It was concluded that the methodology used is state of the art and that it has been successfully verified. Extension of the original design life may be possible.


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    Title :

    Damage Tolerance Analysis and Testing of the Fighter Aircraft 37 Viggen


    Contributors:
    B. Palmberg (author) / M. O. Olsson (author) / P. O. Boman (author) / A. F. Blom (author)

    Publication date :

    1990


    Size :

    13 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Damage Tolerance of the Fighter Aircraft 37 Viggen. Part 1: Analytical Assessment

    B. Palmberg / P. Boman / M. Olsson et al. | NTIS | 1990



    Damage tolerance assessment of the fighter aircraft 37 Viggen main wing attachment

    PALMBERG, BJORN / OLSSON, MATS-OLOF / BOMAN, PER-OLOF et al. | AIAA | 1993



    EMC in Viggen aircraft

    Rapp, L.J. / Paulsson, A.I. | Engineering Index Backfile | 1968