Delamination is modeled in the finite element code LS-DYNA using cohesive zone models based on native contact and spotweld procedures. Guidelines for the use of these procedures are developed and described. Models of composite structures of various levels of complexity are studied using the procedures. Interlaminar fracture tests, laminate crush tests, and a cruciform section representing a section of a rotorcraft subfloor are investigated. These results are used to assess the applicability of the methods for crash analysis of rotorcraft. Results show that the spotweld-based method is capable of providing accurate simulation of delamination initiation and propagation. Achieving accurate crushing loads in the laminate crush tests is difficult, though reasonable simulation of crushing modes is obtained. The models impose substantial computational costs which must be considered when applying such methods to crash modeling efforts.


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    Titel :

    Finite element simulation of delamination with application to crashworthy design


    Beteiligte:


    Erscheinungsdatum :

    2006


    Format / Umfang :

    19 Seiten, 38 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





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