Within the European research program 'Design for Crash Survivability', CRASURV, simulation of the crash behavior of aircraft subfloor components, like sine-wave beams and 'tensor skin' panels, is performed by Univ. Patras. These substructures, which are made of composite materials, were initially developed by NLR and originally suggested in (2) and (3), as energy absorbing elements in helicopter subfloor structures subjected to water impact. The practical application of the 'tensor skin' concept was found in a sandwich corrugated panel configuration. In order to identify their ability to transfer impact loads and absorb impact energy, preliminary static crush tests were performed in one and two-dimensional strips, as well as, in three-dimensional square panels. In the present paper, the modeling methodology of these crashworthiness substructures, using the Finite Element (FE) technique, is described. Numerical simulations of selected initial proof tests of the 'tensor skin' concept and sinewave beam tests, using FE PAM-CRASH code by ESI, are presented. A good correlation between experimental and numerical results was achieved. The development of composite material damage and property degradation models, which is a crucial step in the modeling procedure, is discussed in detail.


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    Title :

    Numerical simulation of composite structures under impact


    Contributors:


    Publication date :

    1998


    Size :

    10 Seiten, 5 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English