Mehmet Haskul

Bio: Mehmet Haskul is an academic researcher from Şırnak University. The author has contributed to research in topics: von Mises yield criterion & Plane stress. The author has an hindex of 3, co-authored 10 publications receiving 25 citations. Previous affiliations of Mehmet Haskul include İnönü University.

Elastic state of functionally graded curved beam on the plane stress state subject to thermal load

Abstract: This study investigates analytical solutions stresses and displacements of the functionally graded cylindrically curved beam subjected to the thermal load in the radial direction. The ends of this ...

Generalized plane strain solution of a thick-walled cylindrical panel subjected to radial heating

Abstract: An analytical model is developed to predict the elastic stress response of a thick-walled cylindrically curved panel subjected to a radial temperature gradient under the assumption of generalized plane strain. The ends of the panel in the angular direction are guided by rigid supports that allow a displacement in the circumferential direction but fix the curvature of the middle surface. As thermal load is applied to the panel, couples act on those ends, giving rise to pure bending conditions even in the case of homogeneous heating. Moreover, the free ends in the axial direction of the panel are taken into consideration. The stresses caused by different types of steady-state thermal loads in the panel are analyzed. Further, the elastic limits leading to plastic flow according to the yield criteria of both Tresca and von Mises are investigated. The results are presented in graphical form.

Radial heating of a thick‐walled cylindrically curved FGM‐panel

Abstract: A cylindrically curved panel in a state of generalized plane strain subject to a radial temperature gradient is discussed by analytical means. The ends of this thick-walled shell are presupposed to be guided in such a way that a displacement in circumferential direction may occur and that the radius of the middle surface remains unchanged. Then, couples act on those ends, giving rise to pure bending condition. The material is power-law functionally graded, and – based on the rule of mixtures – a coherent dependence of all the material properties (except for Poisson's ratio) on the radial coordinate is taken into account. The stresses occurring for both a positive and a negative temperature gradient are analyzed, and one finds that, depending on the grading exponent, the yield limit according to von Mises may be reached either at the inner surface, the outer surface or at both surfaces simultaneously. Numerical results are provided for a steel/aluminum FGM, and it is shown that by appropriate grading not only a reduction of the couples acting at the supports but in some cases also a considerable reduction of the weight of the panel may be achieved.

Free vibration of the double tapered cracked beam

Abstract: This study presents the free vibration analysis of a double tapered beam having linearly varying both thickness and width, by using finite element and component mode synthesis methods. To determine...

Static bending analysis of beams made of functionally graded porous materials

Abstract: This paper constitutes a first attempt to explore the influence of porosity on bending static analysis of functionally graded (FG) beams using a refined mixed finite element beam model. The materia...

Recent progress in electrocatalysts and electrodes for portable fuel cells

Abstract: Fuel cells are devices that transform efficiently the chemical energy of hydrogen or another fuel into clean electricity. The fuel cell technology is attractive for its high-energy efficiency and expanded fuel flexibility and it became very relevant in the last decade. Moreover, the utilization of fuel cells for portable electronic devices has seen remarkable increase in the last few years. Performances of fuel cells, among others, strongly depend on the types of electrocatalysts and membrane, anion exchange or cation exchange, used in the system. Therefore, a status report about the latest advances in electrocatalysts and electrodes for portable fuel cells is the objective of this review paper. Herein, the recent progress in designing electrocatalysts for producing high performance fuel cells with truly potential applicability to be used in portable devices is highlighted.

The progress of fuel cell for malaysian residential consumption: Energy status and prospects to introduction as a renewable power generation system

Abstract: Global population growth has boosted world energy demand. As a developing nation, Malaysia urgently needs a large amount of energy to drive progress and technologies to ensure its convenience. Unfortunately, Malaysia's conventional power production is heavily dependent on natural gas, coal, and oil. As a result, many environmental issues have arisen that harm the region. Besides, large transmission towers' consumption to supply electricity has resulted in high construction and maintenance costs, and problems emerging in uneven areas such as highlands and mountains. Fuel cells have been recognized as an alternative power generation device that simultaneously addresses Malaysia's energy supply and dramatically reduces costs. This article addressed the electricity scenario in Malaysia to demonstrate that fuel cells are a very strong solution as alternative renewable energy to meet the energy demand in this country. The technology in Malaysia for fuel cell-based portable devices and residential energy resources has been discussed as the most advantageous application to be introduced for residential applications.

Transient heating within skin tissue due to time-dependent thermal therapy in the context of memory dependent heat transport law

Abstract: In the present analysis, the bio-heat equation has been studied in the context of memory responses which is defined in the form of convolution having kernels as power functions. The heat transport ...