Experimental and theoretical investigation on flexure performance of pultruded GFRP composite beams with damage analyses

E Madenci, YO Özkılıç, L Gemi - Composite Structures, 2020 - Elsevier
Fiber reinforced polymer (FRP) composite materials produced by pultrusion technique
attract the attention of researchers due to their superior properties. Limited studies are …

Variational approximate for high order bending analysis of laminated composite plates

E Madenci, A Özütok - Structural Engineering and Mechanics, An Int'l …, 2020 - dbpia.co.kr
This study presents a 4 node, 11 DOF/node plate element based on higher order shear
deformation theory for lamina composite plates. The theory accounts for parabolic …

Static analysis of laminated composite beams based on higher-order shear deformation theory by using mixed-type finite element method

A Özütok, E Madenci - International Journal of Mechanical Sciences, 2017 - Elsevier
In this paper, mixed finite element (MFEM) equations which are based on a functional are
obtained by using the Gâteaux differential (GD) for laminated composite beams. Higher …

Free vibration analysis of Kirchhoff plates resting on elastic foundation by mixed finite element formulation based on Gateaux differential

MH Omurtag, A Özütok, AY Aköz… - … journal for numerical …, 1997 - Wiley Online Library
The main objective of the present work is to give the systematic way for derivation of
Kirchhoff plate‐elastic foundation interaction by mixed‐type formulation using the Gâteaux …

The mixed finite element method for the quasi‐static and dynamic analysis of viscoelastic Timoshenko beams

Y Aköz, F Kadioǧlu - International Journal for Numerical …, 1999 - Wiley Online Library
The quasi‐static and dynamic responses of a linear viscoelastic Timoshenko beam on
Winkler foundation are studied numerically by using the hybrid Laplace–Carson and finite …

Free vibration analysis of orthotropic plates resting on Pasternak foundation by mixed finite element formulation

MH Omurtag, F Kadıoḡlu - Computers & structures, 1998 - Elsevier
In mixed finite element formulation three different methods:(1) Hellinger-Reissner principle
(HR);(2) Hu–Washizu principle (HW);(3) Gâteaux Differential Method (GDM), are widely …

The mixed finite element solution of helical beams with variable cross-section under arbitrary loading

MH Omurtag, AY Aköz - Computers & Structures, 1992 - Elsevier
In this study, helical beams with variable cross-section under arbitrary loading are analysed
by finite elements. All types of boundary conditions can be easily taken into account. With …

Free vibration of axially FG curved beam on orthotropic Pasternak foundation via mixed FEM

M Ermis, A Kutlu, N Eratlı, MH Omurtag - Journal of the Brazilian Society of …, 2022 - Springer
The main objective of this study is to present an accurate and consistent original formulation
to describe the interaction between planar straight/curved beam structure and orthotropic …

Structural analysis of a curved beam element defined in global coordinates

L Gimena, FN Gimena, P Gonzaga - Engineering Structures, 2008 - Elsevier
In this article, a system of twelve differential equations expressed in the global Cartesian
coordinate system to simulate the structural behavior of a general curved beam element, is …

Free vibration analysis of cross-ply laminated composite beams by mixed finite element formulation

A Özütok, E Madenci - International journal of structural stability and …, 2013 - World Scientific
In this study, a mixed-finite element method for free vibration analysis of cross-ply laminated
composite beams is presented based on the" Euler–Bernoulli Beam Theory" and" …