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UID:0-547@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20230911T133000

DTEND;TZID=Asia/Jerusalem:20230911T143000

DTSTAMP:20230824T133214Z

URL:https://aerospace.technion.ac.il/events/multiwall-shear-deformable-ort
 hotropic-plates-moderate-large-deflections-nonlinear-analysis-through-appr
 oximate-methods-and-tests/

SUMMARY:Multiwall shear deformable orthotropic plates: moderate large defle
 ctions nonlinear analysis: through approximate methods and tests
DESCRIPTION:Lecturer:Gilad Hakim \n Faculty:Department of Aerospace Enginee
 ring\n Institute:Technion – Israel Institute of Technology\n Location:Cl
 assroom 165\, ground floor\, Library\, Aerospace Eng\n Zoom: https://techn
 ion.zoom.us/j/97346140543\n Abstract: This lecture presents the behavior o
 f rectangular plates for an equally distributed load acting perpendicular 
 to the surface. When the resulting deflections are relatively small\, this
  problem has known analytical solutions. On the other hand\, when the load
  and deflection are large\, compressive and tensile in-plane forces are cr
 eated in the plate that cause the plate to stiffen\, the behavior is non-l
 inear\, and the solutions are only approximated.\nTwo types of plates were
  studied: a thin plate made of an isotropic material and a relatively thic
 k hollow plate with an internal structure of different shapes. The hollow 
 plate is homogenized into a thick orthotropic plate subject to shear defor
 mations in its cross-section.\nThe results of the research were summarized
  in 5 articles\, three of which have already been published and two are un
 der peer review.\nThe behavior of the plates is described by the von Kárm
 án equations set\, which does not have a closed analytical solution for a
  rectangular plate. Therefore\, a number of Finite Element Analyses were p
 erformed that allow to present the defections and stresses that are develo
 ped in the plate. The resulting membrane stress image shows the dangerous 
 points on the plate and suggests ways to reduce the risk.\nCalculating the
  partial derivatives of the deflection and the stress numerically makes it
  possible to place them within the equations and to demonstrate the correc
 tness of the equations in certain areas of the plate. In addition to this\
 , the use of statistical methods results in empirical expressions that rep
 resent the deflections and stresses in plates of different sizes and mater
 ials.\nAnalytical methods for calculating the equivalent elastic constants
  of hollow plates with a simple internal structure\, and methods for measu
 ring the constants in plates with a complex structure are presented. Also\
 , surprising results will be presented in the analysis of thin rectangular
  plates with a large aspect ratio.\n Details: \n 
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng

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TZID:Asia/Jerusalem

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DTSTART:20230324T030000

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