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      Design, fabrication and vibration analysis of a lightweight head expander for a high frequency electrodynamic shaker

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      1 , , , 2
      Materials Testing
      Carl Hanser Verlag

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          Abstract

          Head expanders provide an important interface connection between the armature of a vibration shaker and test objects. The most important parameters are the mass of the test specimen and the resonance frequency of the head expander. For that reason determining the natural frequency of the head expander is essential. Moreover, the mass of the head expander had to be lightweight. A head expander for an LDS V450 model electrodynamic vibration shaker was designed and manufactured using AZ91D magnesium alloy to be as light and rigid as possible. The natural frequencies, mode shapes and vibration characteristics of the head expander were determined by performing structural, FE modal and harmonic analyses as well as vibration measurements. Additionally, an experimental modal test was performed and the equipment was subjected to a white noise vibration test to verify all the results. Analyses indicated that the head expander manufactured was light, rigid, durable and suitable for vibration tests.

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          Most cited references29

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          Is Open Access

          Vibration Durability Testing of Nickel Manganese Cobalt Oxide (NMC) Lithium-Ion 18,650 Battery Cells

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            Application of ANOVA and Taguchi Methods for Evaluation of the Surface Roughness of Stellite-6 Coating Material

            In this study, the machinability of Stellite-6 coating was examined using a ceramic cutting tool. Orthogonal tube-cutting experiments were performed on a lathe and the data collected was evaluated by analysis of variance (ANOVA) to find out the percentage contributions of the key factors. Whisker reinforced ceramic inserts with ISO tool designations RNGN 1907 00T01020 were used for the machining trials and round type cutting tool inserts which are common in the manufacturing industry were chosen. Taguchi design of experiments was implemented to determine the optimal cutting parameters for analyzing the effects of the cutting speed and feed rate on the surface quality. Four cutting speeds and three feed rates were used during the turning operations to produce the regression model for Ra (average surface roughness) in terms of the actual parameter values. Hardness of the cutting inserts gets affected significantly at higher feed rate.
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              Effect of Casting Method of AZ91 D Magnesium Alloy on the Degradation Behaviour in Simulated Body Fluid

              Cem Akca (2011)
              Magnesium-based alloys as biodegradable orthopedic implants have been successful for their high degradation rates in the physiological environment and the consequent loss in the mechanical integrity. Casting method used in production of magnesium-based alloys influences the microstructure of implants due to cooling conditions. In this study, the effects of casting method (permanent mold casting and sand mold casting) on the degradation of AZ91D magnesium alloy in Hank's simulated body fluid at 36.5 ± 0.5°C have been investigated using immersion technique of cylindrical specimens. The specimens were subjected to simulated body fluid for 8 h and 24 h. The results have shown that the cooling rate from melt and grain size have great influence on the degradation rate of magnesium alloy.
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                Author and article information

                Journal
                mp
                Materials Testing
                Carl Hanser Verlag
                0025-5300
                2195-8572
                2 October 2019
                : 61
                : 10
                : 965-972
                Affiliations
                1 Sakarya
                2 Ankara, Turkey
                Author notes
                [] Correspondence Address, Hüseyin Dal, Mechanical Engineering Department, Engineering Faculty, Sakarya University, Sakarya, Turkey, E-mail: hdal@ 123456sakarya.edu.tr

                Dr. Hüseyin Dal received his MS and PhD degree in Mechanical Engineering at Sakarya University, Turkey, in 2005 and 2011, respectively. He served as a Research Assistant in the Department of Mechanical Engineering at Sakarya University from 2002 to 20011. He worked as a researcher at Brunel University, UK, in 2012 for one year. Since 2011, he has been at the University of Sakarya, Turkey where he is currently Lecturer and Assistant Professor for Mechanical Engineering. He was awarded a grant by The Scientific and Technological Research Council of Turkey (TUBITAK). His primary research interest is vibration and industrial noise.

                Murat Baklacı received his Bachelor's Degree (Second-class Honors) in Mechanical Engineering at Sakarya University, Turkey, in 2017 and began preparing for his Master's Degree at the same university. There, he is currently studying for his Master's thesis on HE design and mechanical vibrations. At the same time he has been working as a Researh Assistant on mechanical vibrations and machine design at National Defence University, Ankara, Turkey, since May 2019.

                Article
                MP111407
                10.3139/120.111407
                58117501-e7d5-43f1-88c2-36c8552ad18d
                © 2019, Carl Hanser Verlag, München
                History
                Page count
                References: 34, Pages: 8
                Categories
                Fachbeiträge/Technical Contributions

                Materials technology,Materials characterization,Materials science
                Materials technology, Materials characterization, Materials science

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