Applied Engineering Letters

Number 1, 2020

1-7
A REVIEW TO CAST POLYMER COMPOSITE MATERIALS FOR INTERIOR ENVIRONMENTS

Authors: J. Blagojević, B. Mijatović, D. Kočović, B. Stojanović, L. Ivanović, S. Gajević

Abstract

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Number of views: 362

The paper provides an overview of mechanical properties the cast polymer composite materials. The polymer composite materials are modern materials respectively advanced composites. The paper presents and explains the most common manufacturing method used, with a brief review on design possibilities in interior environments. The products of these materials are used for equipping the interior environment - kitchen, bathroom, laboratory, etc. It is chemical - resistant materials. Cast polymer composite materials are used for fabricating products that are reliable and meet almost all design criteria, some of the designs solutions are presented in the paper. Modern composites become competitors due to the possibility of modeling different design products. Further research of these materials is carried out in order to improve their mechanical properties.

8-15
AIR CONDITIONING AND SELECTED VEHICLE CHARACTERISTICS

Authors: T. Skrúcaný, F. Synák, M. Kendra, S. Milojević

Abstract

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Number of views: 253

The main purpose of the paper is to determine the change in vehicle energy efficiency due to using the air conditioning system. There is a connection between the changes in vehicle energy efficiency and fuel consumption together with time needed for vehicle acceleration. The paper comprises the measurement results performed at stabilized speeds as well as during vehicle acceleration. The final part of the paper outlines the result of calculation of change in vehicle energy efficiency resulting from air conditioning unit used during New European Driving Cycle.

16-21
DETECTION OF SURFACE DEFECTS IN FRICTION STIR WELDED JOINTS BY USING A NOVEL MACHINE LEARNING APPROACH

Authors: A. Mishra, S. B. Dutta

Abstract

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Number of views: 322

The Friction stir welding process is a new entrant in welding technology. The FSW joints have high strength and helps in weight saving considerably than the other joining process as no filler material is added during welding. The weld quality is affected because of various kinds of defects occurring during the FSW process. Defects like cavity, surface grooves and flash could occur due to inappropriate set of process parameters which results in excessive or insufficient heat input. Defects analysis can be done by several non-destructive methods like immersion ultrasonic techniques, X-ray radiography, thermography, eddy current testing, synchrotron technique etc. In the present work the image processing techniques are applied over the test samples to detect the surface defects like pin holes, surface grooves etc.

22-30
EFFECT OF DIAMETER RATIO AND INCLINATION ANGLE ON AIR-WATER SEPARATION OCCURRED AT A SMALL DIAMETER T-JUNCTION

Authors: G. K. Makrygiannis, D. P. Margaris

Abstract

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Number of views: 270

The simple geometry configuration of T-junctions and their capability to act as partial phase separators, especially on offshore platforms, made them common pipeline system components in power and process industries. Moreover, in the pursuit of achieving better phase separation by controlling the maldistribution occurred in the component phases of a mixture at the junction, industries often utilise reduced T-junctions. Nevertheless, most of the published data in which industries was based on to adopt the previous configuration was relating on fully horizontal T-junctions with large main pipe diameters although T-junctions are rarely placed in a horizontal position in such industries, whilst the usage of small main pipe diameters could also lead to scaling down their size. In this regard, the present paper aimed to extend the available data by performing numerical analysis and studying both regular and reduced T-junctions with a small main pipe diameter, and upward inclination angles. It was observed that reduced T junctions performed worse in terms of phase separation compared to regular T-junctions for all inlet conditions applied and irrespective of the side arm inclination, whereas in case of regular T-junctions a superior separation performance was ensured for the inclined side arm at 30°.

31-37
DEVELOPMENT OF THEORY FOR KERNEL-SHELL EXTRACTION ON ROTATING INCLINE

Authors: E. I. Alade, O. A. Koya, O. Kayode, R. A. Adetona

Abstract

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Number of views: 237

Separation theory describing the motions of palm kernel and shell on rotating incline was analysed. Two series of differential equations, in order to obtain the dispatch angles of kernel and shell for the separation process were developed respectively. The differences in the motions and physical features of the particles formed the premise for separation. The results obtained from the theory showed a possibility of product separation within the approximate ranges of dispatch angles between 25 and 90 o for kernels and shells on rotating incline, with specified slide limit, angular velocity and radius of the incline, and comparisons were made between the theoretical and experimental results. The dispatch angles obtained from both theory and experiment reasonably showed significant agreement and therefore suggested validity of the developed theory.