Postbuckling of stiffened panels using strut, strip, and finite element methods

Postbuckling results are presented for isotropic stiffened panels loaded in compression. Comparisons are made between single-bay and double-bay nite element (FE) models (where “bay” denotes a repeating portion, between supports, in the load/length direction) and a new strut model, following a Shanle...

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Main Authors:	M. Lillico, R. Butler, G.W. Hunt, Andrew Watson, David Kennedy
Format:	Default Article
Published:	2003
Subjects:	Aerospace engineering not elsewhere classified Mechanical engineering not elsewhere classified Other engineering not elsewhere classified untagged Aerospace Engineering Mechanical Engineering Engineering not elsewhere classified
Online Access:	https://hdl.handle.net/2134/8902
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id	rr-article-9228911
record_format	Figshare
spelling	rr-article-92289112003-01-01T00:00:00Z Postbuckling of stiffened panels using strut, strip, and finite element methods M. Lillico (7120853) R. Butler (2730304) G.W. Hunt (7120856) Andrew Watson (1251807) David Kennedy (91996) Aerospace engineering not elsewhere classified Mechanical engineering not elsewhere classified Other engineering not elsewhere classified untagged Aerospace Engineering Mechanical Engineering Engineering not elsewhere classified Postbuckling results are presented for isotropic stiffened panels loaded in compression. Comparisons are made between single-bay and double-bay nite element (FE) models (where “bay” denotes a repeating portion, between supports, in the load/length direction) and a new strut model, following a Shanley-type approach, for single-bay and multibay panels. The strut model has been incorporated within the strip programVIPASA with CONstraints and OPTimization (VICONOPT) to design a multibay example panel with postbuckling reserve of strength in its skins, assuming linear elastic material properties. The panel has been shown by VICONOPT to have a stiffener buckling failuremode when an overall sinusoidal imperfection causing increased stiffener compression is present. The failure is con rmed by the double-bay FE model, which is shown to be an imperfect representation of the multibay case. Single-bay analysis using the strut model shows good agreement with the single-bay FE results. The VICONOPT code is able to design a metallic panel of realistic dimensions and loading using 50 strip elements (compared with the 9600 shell elements required by the nite element model) but cannot correctly account for material nonlinearity. The important phenomenological difference between postbuckling of single-, double-, and multibay panel models are indicated. 2003-01-01T00:00:00Z Text Journal contribution 2134/8902 https://figshare.com/articles/journal_contribution/Postbuckling_of_stiffened_panels_using_strut_strip_and_finite_element_methods/9228911 CC BY-NC-ND 4.0
institution	Loughborough University
collection	Figshare
topic	Aerospace engineering not elsewhere classified Mechanical engineering not elsewhere classified Other engineering not elsewhere classified untagged Aerospace Engineering Mechanical Engineering Engineering not elsewhere classified
spellingShingle	Aerospace engineering not elsewhere classified Mechanical engineering not elsewhere classified Other engineering not elsewhere classified untagged Aerospace Engineering Mechanical Engineering Engineering not elsewhere classified M. Lillico R. Butler G.W. Hunt Andrew Watson David Kennedy Postbuckling of stiffened panels using strut, strip, and finite element methods
description	Postbuckling results are presented for isotropic stiffened panels loaded in compression. Comparisons are made between single-bay and double-bay nite element (FE) models (where “bay” denotes a repeating portion, between supports, in the load/length direction) and a new strut model, following a Shanley-type approach, for single-bay and multibay panels. The strut model has been incorporated within the strip programVIPASA with CONstraints and OPTimization (VICONOPT) to design a multibay example panel with postbuckling reserve of strength in its skins, assuming linear elastic material properties. The panel has been shown by VICONOPT to have a stiffener buckling failuremode when an overall sinusoidal imperfection causing increased stiffener compression is present. The failure is con rmed by the double-bay FE model, which is shown to be an imperfect representation of the multibay case. Single-bay analysis using the strut model shows good agreement with the single-bay FE results. The VICONOPT code is able to design a metallic panel of realistic dimensions and loading using 50 strip elements (compared with the 9600 shell elements required by the nite element model) but cannot correctly account for material nonlinearity. The important phenomenological difference between postbuckling of single-, double-, and multibay panel models are indicated.
format	Default Article
author	M. Lillico R. Butler G.W. Hunt Andrew Watson David Kennedy
author_facet	M. Lillico R. Butler G.W. Hunt Andrew Watson David Kennedy
author_sort	M. Lillico (7120853)
title	Postbuckling of stiffened panels using strut, strip, and finite element methods
title_short	Postbuckling of stiffened panels using strut, strip, and finite element methods
title_full	Postbuckling of stiffened panels using strut, strip, and finite element methods
title_fullStr	Postbuckling of stiffened panels using strut, strip, and finite element methods
title_full_unstemmed	Postbuckling of stiffened panels using strut, strip, and finite element methods
title_sort	postbuckling of stiffened panels using strut, strip, and finite element methods
publishDate	2003
url	https://hdl.handle.net/2134/8902
_version_	1797470158969634816

Postbuckling of stiffened panels using strut, strip, and finite element methods

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