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 …

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 …

[HTML][HTML] The static and dynamic analyses of warping included composite exact conical helix by mixed FEM

UN Aribas, M Ermis, N Eratli, MH Omurtag - Composites Part B …, 2019 - Elsevier
The objective of this study is to investigate the combined influence of two important topics on
the precision of static and dynamic analyses of non-circular composite helical bars, namely …

Forced vibration analysis of composite-geometrically exact elliptical cone helices via mixed FEM

UN Aribas, M Ermis, A Kutlu, N Eratli… - Mechanics of Advanced …, 2022 - Taylor & Francis
In this pioneering study, the cross-sectional warping included transient response and
normal/shear stress components of composite elliptical and elliptical cone helices over exact …

Forced vibration analysis of viscoelastic helical rods with varying cross-section and functionally graded material

FF Calim, YC Cuma - Mechanics Based Design of Structures and …, 2023 - Taylor & Francis
In scope of this study, forced vibration analysis of viscoelastic helical rods with varying cross-
section and functionally graded material are investigated. Differential equations governing …

An efficient approach for free vibration behaviour of non-uniform and non-homogeneous helices

HT Türker, YC Cuma, FF Calim - Iranian Journal of Science and …, 2023 - Springer
The paper presents an efficient numerical method for free vibration analysis of non-uniform
and non-homogeneous cylindrical helices. Power law distribution is used for the variation of …

Dynamic response of viscoelastic functionally graded barrel and hyperboloidal coil springs with variable cross-sectional area

YC Cuma, FF Calim - Mechanics of Time-Dependent Materials, 2022 - Springer
This paper investigates the dynamic response of viscoelastic axially functionally graded
(AFG) barrel and hyperboloidal coil springs with variable cross-sectional area. Equations …

Vibration analysis of nonuniform hyperboloidal and barrel helices made of functionally graded material

FF Calim, YC Cuma - Mechanics Based Design of Structures and …, 2022 - Taylor & Francis
This study is in investigation of free vibration behavior of functionally graded hyperboloidal
and barrel helices with variable cross section. Material and geometric variations of …

Exact determination of the global tip deflection of both close-coiled and open-coiled cylindrical helical compression springs having arbitrary doubly-symmetric cross …

V Yıldırım - International Journal of Mechanical Sciences, 2016 - Elsevier
A general formulation of the static deflection under an axial force is required for accurate
static, buckling and dynamic analyses. Even today, however, the helical spring formulas …

Static and dynamic analysis of conical helices based on exact geometry via mixed FEM

M Ermis, MH Omurtag - International Journal of Mechanical Sciences, 2017 - Elsevier
The first objective of this research is to indicate the steps that are necessary to generate an
exact non-circular (Lancert type) helix geometry as an alternative to the widely used …