Fabrication and erection procedures for development of computerised full scale fatigue test rig

Shivaramaiah, - and Chandrasekhar, C and Nair, NK (1978) Fabrication and erection procedures for development of computerised full scale fatigue test rig. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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    Abstract

    After successful completion of the test programme of Gnat Fighter Aircraft using full scale fatigue test rig developed by NAL, the Fatigue Group has taken the major task of developing a computerised full scale fatigue test rig under the project of development of fatigue test facilities. This has felt necessary in view of the practical difficulties experienced during the use of the existing six actuator full scale fatigue test rig. Sufficient clear heights for rigging of loading trees was an important consideration in the design of the new test rig. The floor area of the test rig was arrived at by examining the plan form dimensions of13; number of fighter air-crafts in IAF (Fig.1). It was decided that the test rig should be designed as a quot;self reacting frame work in order to avoid heavy foundation work. Another requirement was that there should be enough free entry space so that air frames of most of the fighter aircrafts can be easily moved into the test rig. The facility has been conceived Initially as a 24 actuator system in which 16 actuators are assigned to the wings, 5 actuators to the fuselage and 3 actuators to the empennage. The system will be enlarged subsequently to include more number of actuators . The test rig itself has been designed for a maximum operational load of 50,000 lbs with the maximum structural deflection restricted to 20 mm at design load.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Erection;Fabrication;Computerisation;Fatigue test
    Subjects: AERONAUTICS > Aeronautics (General)
    Division/Department: Materials Science Division, Materials Science Division, Engineering Services Division
    Depositing User: Mr. Ravikumar R
    Date Deposited: 29 Nov 2006
    Last Modified: 24 May 2010 09:53
    URI: http://nal-ir.nal.res.in/id/eprint/3553

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