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Meifal Rusli

Bio: Meifal Rusli is an academic researcher from Andalas University. The author has contributed to research in topics: Vibration & Noise. The author has an hindex of 5, co-authored 23 publications receiving 113 citations. Previous affiliations of Meifal Rusli include Syiah Kuala University & Tokyo Institute of Technology.

Papers
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Journal ArticleDOI
TL;DR: In this article, the effect of ultrasonic vibration and the electrolyte level on the performance of gravity-feed drilling by ECDM was investigated, where a tungsten rod as a tool electrode was fed by gravity.
Abstract: Electro-chemical discharge machining (ECDM) is one of nontraditional processes for micro-fabrication of non-conductive materials. A high applied voltage is preferable to form a gas film and to generate discharge in the film. However, accumulation of discharge heat often causes cracks of the surface because non-conductive materials have low heat conductivity. In this study, the effect of ultrasonic vibration and the electrolyte level on the performance of gravity-feed drilling by ECDM was investigated. Ultrasonic vibration was applied to a glass plate. A tungsten rod as a tool electrode was fed by gravity. Ultrasonic vibration changed the discharge behavior and improved electrolyte circulation. Although high amplitude ultrasonic vibration caused very dense and wide current pulses consistently during machining process, it decreased removal rate significantly. In addition, electrolyte levels affect single bubble size and the resistance in the electrolyte. Low electrolyte level will cause higher resistance, and higher temperature of the tool electrode and workpiece. A high bias current flew at a low electrolyte level without ultrasonic vibration. In this case, removal rate decreased and surface integrity was improved.

39 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigate the effect of topography of contact surfaces to the normal contact stiffness, the tangential contact stiffness and the friction coefficient, and show that a structure has only one or few pairs of couple modes with complex eigenvalues at certain contact conditions.

38 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed a new method for reducing the shock vibration response of an UAV during the landing process by means of the momentum exchange principle (MEID), which reduced the impact of the UAV's impact on the ground.
Abstract: This study proposes a new method for reducing the shock vibration response of an Unmanned Aerial Vehicle (UAV) during the landing process by means of the momentum exchange principle (MEID). The per...

16 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed an idea to predict the possibility of squeal noise occurrence in actual structures having relative sliding surfaces with friction by means of experimental modal analysis and experimental spatial matrix identification.
Abstract: Friction between two relatively sliding surfaces in mechanical structures possibly excites unstable vibration, which emits squeal noise. In this paper, the authors propose an idea to predict the possibility of squeal noise occurrence in actual structures having relative sliding surfaces with friction by means of experimental modal analysis and experimental spatial matrix identification. Using spatial matrices that derived from experimental modal data, unstable mode coupling that causes squeal noise can be predicted. By this method it is possible to calculate the possibility of squeal noise incident and its frequency within the practical realistic range of friction coefficient and contact stiffness. The method is presented with showing an experimental verification study using a simple L shape frame.

7 citations

Journal ArticleDOI
TL;DR: In this paper, a simple technique to improve the performance of PMEID utilizing the prestraining spring mechanism (PSMEID) is proposed, and the dynamic model of the system with PSMEID is derived.
Abstract: A shock load occurred in a short time duration can lead to dangerous effect on the machine or structure. The use of conventional technique for shock vibration control by modifying the systems damping reduces the steady-state response of the system. However, this method fails to attenuate a large acceleration peak at the moment after the shock. An alternative method for reducing the maximum acceleration peak due to shock load using the principle of momentum exchange has been developed. When the shock excitation frequency is much larger in comparison with the main mass natural frequency, the passive momentum exchange impact damper(PMEID) produces good performance. However, the performance of PMEID decreases as the shock excitation frequency close to the main mass natural frequency. In this research, a simple technique to improve the performance of PMEID utilizing the pre-straining spring mechanism (PSMEID) is proposed. The dynamic model of the system with PSMEID is derived. Next, the simulation is conducted to evaluate the effectiveness of the proposed method.

6 citations


Cited by
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Journal ArticleDOI
TL;DR: A comparative study of conventional and non-conventional micro-drilling techniques is presented in this paper to show the potential and versatility of various micro drilling methods and their applications in modern age applications.

131 citations

Journal ArticleDOI
TL;DR: A comprehensive review of the recent developments in ECDM process, its variants and their triplex hybrid methods is presented in this article, where the future research possibilities are identified and presented as research potentials.
Abstract: Electrochemical discharge machining (ECDM) is a hybrid non-conventional machining process, used to machine electrically conductive and non-conductive materials. It is a preferred process to fabricate micro scale features like micro holes, micro channels, microgrooves and 3-dimensional intricate shapes on variety of materials. In order to improve the efficacy of ECDM process, certain technical augmentations are provided with basic configuration of ECDM. These augmentations result in developments of ECDM process variants. Further, research community has developed ECDM based triplex hybrid methods for further process enrichment. This review article presents a comprehensive review of these recent developments in ECDM process, its variants and their triplex hybrid methods. The future research possibilities are identified and presented as research potentials.

126 citations

Journal ArticleDOI
TL;DR: In this paper, the concept of mechanism of material removal in ECDM is reviewed till date; scopes for further research have been identified, and possible future efforts to enhance the material removal rate in ECCM are also discussed.
Abstract: The concept of electrochemical discharge machining (ECDM), also known as electrochemical spark machining (ECSM), was presented for the first time in 1968. Since then, this technology remains as research topic and was never explained seriously for industrial applications. The ECDM is a non-traditional machining technology used for machining of electrically non-conducting materials like glass, ceramics, quartz, etc. The literature reveals that the concept of mechanism of material removal in this machining process is not yet understood well. However, phenomena involved in the material removal needs to be investigated well in order to improve the process. In this paper, the concept of mechanism of material removal in ECDM is reviewed till date; scopes for further research have been identified. Possible future efforts to enhance the material removal rate in ECDM are also discussed.

110 citations

Journal ArticleDOI
01 Apr 2013-Wear
TL;DR: In this article, the influence of groove-textured surfaces on tribological behaviors and friction-induced vibration and noise properties was investigated using a ball-on-flat reciprocating sliding configuration, and it was shown that the squeal generated from the surface was more influenced by the dimensional proportion of groove width to pitch instead independently by groove width or pitch.

86 citations