POSTBUCKLING ANALYSIS OF VARIABLE ANGLE TOW SHELL STRUCTURES USING A HYBRID-TREFFTZ FINITE ELEMENT

Francesco S. Liguori, Giovanni Zucco, Antonio Madeo

Research output: Contribution to conferencePaperpeer-review

Abstract

A mixed shell finite element for the analysis of Variable Angle Tow (VAT) laminated composite structures undergoing geometrical nonlinearities is presented. Following the Hybrid-Trefftz method, the stress interpolation is derived from the linear elastic solution for symmetric composite materials.Displacement and rotation fields are only assumed along the element edges. Therefore, all the operators are efficiently obtained through analytical line integration. The geometrical nonlinearity is introduced by adopting a corotational formulation. The proposed finite element, named MISS-4c, proves to be locking free and shows no rank defectiveness. A multimodal Koiter's algorithm is used to obtain the initial postbuckling response. Results show good accuracy and high convergence rate in the geometrically nonlinear analysis of VAT shell structures.

Original languageEnglish
Publication statusPublished - 2023
Event23rd International Conference on Composite Materials, ICCM 2023 - Belfast, United Kingdom
Duration: 30 Jul 20234 Aug 2023

Conference

Conference23rd International Conference on Composite Materials, ICCM 2023
Country/TerritoryUnited Kingdom
CityBelfast
Period30/07/234/08/23

Keywords

  • corotational formulation
  • geometrically nonlinear analysis
  • hybrid-Trefftz method
  • mixed shell element
  • Variable angle tow

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