Cihan Demir

Cihan Demir
Yildiz Technical University · Department of Mechanical Engineering

PhD

About

25
Publications
4,956
Reads
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123
Citations
Citations since 2017
14 Research Items
94 Citations
2017201820192020202120222023051015
2017201820192020202120222023051015
2017201820192020202120222023051015
2017201820192020202120222023051015
Additional affiliations
January 1997 - present
Yildiz Technical University
Position
  • Professor (Associate)

Publications

Publications (25)
Article
Full-text available
This study consists of constructing and analyzing gear mathematical models of torque split systems for contact pressure distribution and dynamic transmission error at different gear positions concerning phase angles. According to the method specified in the AGMA 927 standard, load distribution is calculated by considering shaft torsion and bending...
Article
The study aimed to evaluate the effects of fibers insertion and restorative material type on the stress distribution in endocrowns with finite element analysis. Five 3D models of first mandibular molars were created and restored as follows: (1) IN: intact tooth, (2) IPS-E: tooth restored with lithium disilicat ceramic endocrowns, (3) C-E: tooth res...
Article
It is a fact that specifying numerically the natural frequencies of a marine propeller rotating in a water environment is quite difficult due to the problem that arises from the inability to consider the effect of rotation and pressure distribution in the modal acoustic module of the software. In the present study, an alternative approach to the ex...
Article
Full-text available
PURPOSE OF THE STUDY In this study, our aim is to examine the effect of proximal fibular osteotomy on knee and ankle kinematics with finite element analysis method. MATERIAL AND METHODS One 62-year-old, female volunteer's radiologic images were used for creating lower limb model. Osteotomized model (OM) which was created according to definition of...
Article
Full-text available
The harmonic response and resonance frequency behavior of the spring supported FGM beam against the lateral motion for the various values of support stiffness at the ends are analyzed by using the force transmissibility parameter with the finite-element method and Lagrange's equations. The steady-state responses to a sinusoidal varying force are de...
Article
In most city water distribution systems, a considerable amount of water is lost because of leaks occurring in pipes. Moreover, an unobservable fluid leakage fault that may occur in a hazardous industrial system, such as nuclear power plant cooling process or chemical waste disposal, can cause both environmental and economical disasters. This situat...
Article
Full-text available
Z Bu çalışmada farklı çaplara sahip farklı tiplerdeki tek helis açısına sahip ön gerilmeli monotron halatların doğal frekans analizi teorik ve deneysel olarak yapılmıştır. Teorik analizde daha önce çıkartılmış analitik formüllerden yararlanılmıştır. Bununla birlikte halat katı modeli oluşturularak sonlu elemanlar yöntemi ile doğal frekans analizi y...
Article
This study examines the seismic behavior of the minaret of the well-known historical structure “Sultan Ahmed Mosque” under strong earthquake motion. Despite their slenderness and height, minarets are towers with well-established earthquake resistance. In general, these structures were constructed adjacent to the main structure and/or its components...
Article
Full-text available
The paper deals with the seismic behavior of a masonry memorial which experienced two earthquakes in one year and suffered serious structural damage. The memorial was first built in 1992 to commemorate the soldiers died in great Gallipoli war, which was held between Ottoman Empire and Allied countries in Çanakkale peninsula a hundred years ago. In...
Article
The paper deals with the seismic behavior and retrofitting of a historical masonry building called Treasury Building of Hagia Sophia (Skeuophylakion: a building where eucharistic elements were collected and prepared for services) which has experienced lots of earthquakes since it was constructed in 361 and suffered structural damage since then. A d...
Article
Full-text available
In this study, the resonance frequency behavior of a functionally graded beam under viscoelastic boundary conditions is investigated. Nondimensional frequency parameters of the beam are analyzed using the finite element method. The system of equations of motion is derived by using Lagrange’s equations under the assumption of Euler–Bernoulli beam th...
Article
Full-text available
Object: The center (axis) of rotation (COR) in the lumbar spine has been studied well. However, there is limited information on the kinetic and kinematic consequences of imposed shift in the location of the COR, although this type of shift can be seen after surgeries using motion preservation or dynamic stabilization devices. The objective of this...
Article
Full-text available
Object: The goal of this study was to investigate the effect of ligament failure on the instantaneous center of rotation (ICR) in the lower lumbar spine. Methods: A 3D finite element model of the L4-5 segment was obtained and validated. Ligament failure was simulated by reducing ligaments in a stepwise manner from posterior to anterior. A pure b...
Article
Full-text available
The dynamic behavior of plates with mixed boundary conditions has been the subject of intensive study for many years due to its great importance in many engineering applications. On-trend approach in dynamic response analysis is to combine mathematical model, test results and computer simulation. Classical techniques of mathematical modeling of int...
Conference Paper
Full-text available
In this study, free vibration analysis of a functionally graded (FG) beam under various boundary conditions is carried out. Natural frequencies of the FG beam are analysed by using Finite Elements method. The system of equations of motion is derived by using Lagrange's equations with the assumption of Euler-Bernoulli beam theory. The material prope...
Article
Full-text available
The fundamental frequencies of plate are important for engineering designs. Free vibration characteristics of isotropic rectangular plates with point, spring and viscoelastic supports have been studied by several researchers. However, the practical implementation of these boundary conditions in application is not at all trivial. In this study, the...
Article
Full-text available
The vibration of orthotropic rectangular plates having viscoelastic point supports symmetrically located on its diagonals is analyzed. The plate is under the effect of a sinusoidally varying force at its center. The Lagrange equations are used in the solution process. To apply the Lagrange equations, the trial function denoting the deflection of th...
Article
Full-text available
Vibration of orthotropic rectangular plates having viscoelastic point supports at the corners with symmetrically added four concentrated masses rigidly mounted on the two diagonals of the plate is analyzed. The Lagrange equations are used to examine the steady state response to a sinusoidally varying force applied at the centre of a viscoelasticall...
Article
Full-text available
Vibration of orthotropic rectangular plates having viscoelastic point supports at the corners under the effect of sinusoidally varying concentrated moment is analyzed. The Lagrange equation is used to examine the free vibration characteristics and the steady state response to a sinusoidally varying concentrated moment acting at the centre of a visc...
Article
Full-text available
Calculation of resonance frequencies of a six-wheeled vehicle has been propesed in this work by means of computational and experimental methods. In modelling vehicle, elastic body and rigid body techniques were used in computational methods. Therefore a three – dimensional finite element model was generated using beam elements and shell elements. T...

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