Müge Balkaya

Bio: Müge Balkaya is an academic researcher from Istanbul Technical University. The author has contributed to research in topics: Gasket & Cast iron pipe. The author has an hindex of 8, co-authored 18 publications receiving 197 citations.

Analysis of the vibration of an elastic beam supported on elastic soil using the differential transform method

Abstract: In this paper, a simulation method called the differential transform method (DTM) is employed to predict the vibration of an Euler–Bernoulli and Timoshenko beam (pipeline) resting on an elastic soil. The DTM is introduced briefly. DTM can easily be applied to linear or nonlinear problems and reduces the required computational effort. With this method exact solutions may be obtained without any need for cumbersome calculations and it is a useful tool for analytical and numerical solutions. To clarify and illustrate the features and capabilities of the presented method, various problems have been solved by using the technique and solutions have been compared with those obtained in the literature.

Study of Nonuniform Bedding Support Because of Erosion under Cast Iron Water Distribution Pipes

Abstract: Several recent studies have investigated failure mechanisms for cast iron water pipes. These studies have primarily focused on the adverse effects of corrosion, frost, reactive backfill, and earthquakes. It appears that leaking pressure pipes can produce erosion voids under the buried structure. In this paper, a parametric study employing three-dimensional finite-element analyses is used to examine buried, continuous, cast iron water pipes. The objective is to understand the effect of such erosion voids on the stability of buried cast iron pipes and the longitudinal soil-pipe interaction. The results of the finite-element analyses demonstrate that the radial (σR) and the axial stresses (σA) are low compared with the hoop stresses (σθ), and the peak tension is always in the hoop direction. As a result of the high hoop stresses induced by the nonuniform bedding support, longitudinal fractures are likely to occur in the pipe, which may consequently cause pipe failure.

Elastic and viscoelastic foundations: a review on linear and nonlinear vibration modeling and applications

Abstract: This paper presents a comprehensive review on different theoretical elastic and viscoelastic foundation models in oscillatory systems. The review covers the simplest foundation models to the most complicated one and fully tracks the recent theories on the topic of mechanical foundations. It is fully discussed why each theory has been developed, what limitations each one contains, and which approaches have been applied to remove these limitations. Moreover, corresponding theories about structures supported by such foundations are briefly reviewed. Subsequently, an introduction to popular solution methods is presented. Finally, several important practical applications related to the linear and nonlinear foundations are reviewed. This paper provides a detailed theoretical background and also physical understanding from different types of foundations with applications in structural mechanics, nanosystems, bio-devices, composite structures, and aerospace-based mechanical systems. The presented information of this review article can be used by researchers to select an appropriate kind of foundation/structure for their dynamical systems. The paper ends with a new idea of intelligent foundations based on nanogenerators, which can be exploited in future smart cities for both energy harvesting and self-powered sensing applications.

Heat transfer study on solid and porous convective fins with temperature-dependent heat generation using efficient analytical method

Abstract: A simple and highly accurate semi-analytical method, called the differential transformation method (DTM), was used for solving the nonlinear temperature distribution equation in solid and porous longitudinal fin with temperature dependent internal heat generation. The problem was solved for two main cases. In the first case, heat generation was assumed variable by fin temperature for a solid fin and in second heat generation varied with temperature for a porous fin. Results are presented for the temperature distribution for a range of values of parameters appearing in the mathematical formulation (e.g. N, ɛ G , and G). Results reveal that DTM is very effective and convenient. Also, it is found that this method can achieve more suitable results in comparison to numerical methods.