Nonlinear modelling of delaminated struts

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

doi:10.2514/1.5981

Nonlinear modelling of delaminated struts

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

Department of Mechanical Engineering

Research output: Contribution to conference › Paper › peer-review

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 language	English
DOIs	https://doi.org/10.2514/1.5981
Publication status	Published - 2003
Event	Proceedings of the 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Norfolk, Virginia, USA United States Duration: 7 Apr 2003 → 10 Apr 2003

Conference

Conference	Proceedings of the 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Country/Territory	USA United States
City	Norfolk, Virginia
Period	7/04/03 → 10/04/03

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10.2514/1.5981

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title = "Nonlinear modelling of delaminated struts",

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.",

author = "Hunt, {G W} and B Hu and R Butler and Almond, {Darryl P}",

year = "2003",

doi = "10.2514/1.5981",

language = "English",

note = "Proceedings of the 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference ; Conference date: 07-04-2003 Through 10-04-2003",

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TY - CONF

T1 - Nonlinear modelling of delaminated struts

AU - Hunt, G W

AU - Hu, B

AU - Butler, R

AU - Almond, Darryl P

PY - 2003

Y1 - 2003

N2 - 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.

AB - 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.

UR - http://dx.doi.org/10.2514/1.5981

U2 - 10.2514/1.5981

DO - 10.2514/1.5981

M3 - Paper

T2 - Proceedings of the 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

Y2 - 7 April 2003 through 10 April 2003

ER -

Nonlinear modelling of delaminated struts

Abstract

Conference

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