This paper describes the fractographic analysis of five CFRP post-buckled skin/stringer panels that were tested to failure in compression. The detailed damage mechanisms for skin/stiffener detachment in an undamaged panel were characterised and related to the stress conditions during post-buckling; in particular the sites of peak twist (at buckling nodes) and peak bending moments (at buckling anti-nodes). The initial event was intralaminar splitting of the +45 plies adjacent to the skin/stiffener interface, induced by high twist at a nodeline. This was followed by mode II delamination, parallel to +- 45 plies and then lengthwise (0 ) shear along the stiffener centreline. The presence of defects or damage was found to influence this failure process, leading to a reduction in strength. This research provides an insight into the processes that control post-buckled performance of stiffened panels and suggests that 2D models and element tests do not capture the true physics of skin/stiffener detachment: a full 3D approach is required.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Stiffener debonding mechanisms in post-buckled CFRP aerospace panels


    Beteiligte:


    Erscheinungsdatum :

    2005


    Format / Umfang :

    13 Seiten




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    GLOBAL-LOCAL ANALYSIS OF BONDED SKIN-TO-STIFFENER JOINTS IN POST-BUCKLED PANELS

    Coudor, P. / van der Veen, S. / Beakou, A. et al. | British Library Conference Proceedings | 2006


    Probing of Thermally Buckled Panels and the Effect of a Stiffener

    Cervi, Charles / Perez, Ricardo / Virgin, Lawrence | AIAA | 2025


    The Performance of Post-Buckled CFRP Stringer-Stiffened Panels Containing Defects and Damage

    Greenhalgh, Emile / Meeks, Charlotte / Clarke, Andrew et al. | AIAA | 2003


    The Performance of Post-Buckled CFRP Stringer-Stiffened Panels Containing Defects and Damage

    Greenhalgh, E. / Meeks, C. / Clarke, A. et al. | British Library Conference Proceedings | 2003


    FRACTURE MECHANICS ANALYSES FOR SKIN-STIFFENER DEBONDING

    RAJU, I. / SISTLA, R. / KRISHNAMURTHY, T. et al. | AIAA | 1993