A posteriori initial imperfection identification in shell buckling problems

The current research seeks to demonstrate that an inverse solution approach, leveraging nonlinear finite element analysis with a divide and conquer type stochastic search algorithm, can identify the presence of localized denting imperfections in cylindrical shell structures. This imperfection field...

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Published in:	Computer methods in applied mechanics and engineering Vol. 198; no. 2; pp. 260 - 268
Main Authors:	Stull, Christopher J., Earls, Christopher J., Aquino, Wilkins
Format:	Journal Article
Language:	English
Published:	Kidlington Elsevier B.V 01.12.2008 Elsevier
Subjects:	Buckling Computational techniques Exact sciences and technology Fracture mechanics (crack, fatigue, damage...) Fundamental areas of phenomenology (including applications) Initial imperfections Inverse problems Mathematical methods in physics Physics Shell buckling Solid mechanics Stochastic search Structural and continuum mechanics Shell buckling Inverse problems Initial imperfections Stochastic search Probabilistic approach Ultimate limit Revolution shell Modeling Search algorithm Inverse problem Finite element method Displacement measurement Defect Cylindrical shell Non linear effect Buckling Divide and conquer method
ISSN:	0045-7825, 1879-2138
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Abstract	The current research seeks to demonstrate that an inverse solution approach, leveraging nonlinear finite element analysis with a divide and conquer type stochastic search algorithm, can identify the presence of localized denting imperfections in cylindrical shell structures. This imperfection field identification is achieved using rather sparse displacement measurements taken at safe, service loading conditions. Both the existence and nature of the imperfection field present in a given shell structure instance are determined. These inferred imperfections are subsequently used to make reasonably accurate predictions regarding the actual shell structure strength at ultimate loading.
AbstractList	The current research seeks to demonstrate that an inverse solution approach, leveraging nonlinear finite element analysis with a divide and conquer type stochastic search algorithm, can identify the presence of localized denting imperfections in cylindrical shell structures. This imperfection field identification is achieved using rather sparse displacement measurements taken at safe, service loading conditions. Both the existence and nature of the imperfection field present in a given shell structure instance are determined. These inferred imperfections are subsequently used to make reasonably accurate predictions regarding the actual shell structure strength at ultimate loading.
Author	Stull, Christopher J. Earls, Christopher J. Aquino, Wilkins
Author_xml	– sequence: 1 givenname: Christopher J. surname: Stull fullname: Stull, Christopher J. – sequence: 2 givenname: Christopher J. surname: Earls fullname: Earls, Christopher J. email: cje23@cornell.edu – sequence: 3 givenname: Wilkins surname: Aquino fullname: Aquino, Wilkins
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Cites_doi	10.1016/S0020-7462(01)00098-1 10.1016/j.cma.2004.01.043 10.3934/dcdsb.2003.3.505 10.1002/nme.1620220312 10.1061/(ASCE)0733-9399(2004)130:8(867) 10.1002/pamm.200510103 10.1016/0898-1221(90)90272-L 10.1108/eb023562 10.1016/j.ijsolstr.2007.02.027 10.1016/j.cma.2007.03.014 10.1016/0045-7949(83)90101-3 10.1016/S0020-7462(01)00111-1 10.1002/nme.1620210213 10.1002/stc.202 10.2514/3.3919 10.1007/s00158-001-0167-x 10.1016/S0020-7462(01)00058-0
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Keywords	Shell buckling Inverse problems Initial imperfections Stochastic search Probabilistic approach Ultimate limit Revolution shell Modeling Search algorithm Inverse problem Finite element method Displacement measurement Defect Cylindrical shell Non linear effect Buckling Divide and conquer method
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SubjectTerms	Buckling Computational techniques Exact sciences and technology Fracture mechanics (crack, fatigue, damage...) Fundamental areas of phenomenology (including applications) Initial imperfections Inverse problems Mathematical methods in physics Physics Shell buckling Solid mechanics Stochastic search Structural and continuum mechanics
Title	A posteriori initial imperfection identification in shell buckling problems
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