Isogeometric plate element for unstiffened and blade stiffened laminates based on refined zigzag theory
Haşim, Kazım Ahmet and Kefal, Adnan and Madenci, Erdoğan (2019) Isogeometric plate element for unstiffened and blade stiffened laminates based on refined zigzag theory. Composite Structures, 222 . ISSN 0263-8223 (Print) 1879-1085 (Online)
Official URL: http://dx.doi.org/10.1016/j.compstruct.2019.110931
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 C1 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.
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