Isogeometric plate element for unstiffened and blade stiffened laminates based on refined zigzag theory

Kazim Ahmet Hasim, Adnan Kefal, Erdogan Madenci

Research output: Contribution to journalArticle


This study presents an isogeometric plate element, IG-RZT based on the refined zigzag theory (RZT)to model bending behavior of blade stiffened and unstiffened thick or thin laminates. This element is free of shear-locking and shear correction factors due to the use of Non-Uniform Rational B-Splines (NURBS)functions which satisfy the requirement of C 1 continuity in the computation of transverse shear stresses. Comparison of the predictions with IG-RZT element with the previous benchmark solutions reveals fast convergence and high accuracy for general laminate layups under different loading and boundary conditions. Thus, the IG-RZT element can be adopted for computationally efficient and accurate analysis of unstiffened and stiffened flat laminates.

Original languageEnglish (US)
Article number110931
JournalComposite Structures
Publication statusPublished - Aug 15 2019



  • Composite
  • Finite element
  • Flat shells
  • Isogeometric
  • Single-layer theory
  • Zigzag functions

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering

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