Nonlinear modelling of delaminated struts

G W Hunt, B Hu, R Butler, Darryl P Almond

Research output: Contribution to conferencePaper

Abstract

A simplified four degree-of-freedom nonlinear Rayleigh-Ritz formulation for the buckling and postbuckling of partially delaminated struts is presented. Bifurcation analysis indicates that in general instability occurs at an asymmetric point of bifurcation. After bifurcation, realistic solutions are found to follow the stable post-buckling path, the unstable branch being denied by contact between the contributing laminates. Depending on the geometry and position of the delamination, either thoroughly stable (thin film) or unstable (general) buckling follows in the post-buckling range. Asymptotic post buckling results are obtained with the help of the algebraic manipulation code Maple, and are compared with predictions from finite element ABAQUS runs.
Original languageEnglish
DOIs
Publication statusPublished - 2003
EventProceedings of the 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Norfolk, Virginia, USA United States
Duration: 7 Apr 200310 Apr 2003

Conference

ConferenceProceedings of the 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
CountryUSA United States
CityNorfolk, Virginia
Period7/04/0310/04/03

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    Hunt, G. W., Hu, B., Butler, R., & Almond, D. P. (2003). Nonlinear modelling of delaminated struts. Paper presented at Proceedings of the 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Norfolk, Virginia, USA United States. https://doi.org/10.2514/1.5981