The compressive response of palm slag composites is an essential part of basic property data required for optimized design of composite structure. The compressive strength and wear rate behavior at room temperature of palm slag composites was experimentally investigated using various percentage weight of materials content. The six recipes of various composition materials content were compacted for the green body of palm slag composites (palm slag, phenolic resin, steel fiber, graphite, and alumina). Each recipe was mixed to obtain a homogenous mixture and then the mixtures were prepared by compression molding. The compressive strength of palm slag composites was determined by a universal testing machine. The wear behavior of palm slag composites was calculated from the data determined using polisher grinding machine. The SEM micrographs were used for surface observation. The compressive strength of palm slag composite was determined and it was found the compressive strength increases with increasing steel fiber content and palm slag content decreased. The wear behavior decreases with increasing alumina content.
Department of Mechanical Engineering, Universitas Riau, Pekanbaru, 28293, Indonesia
Computational simulation of compactor components for plate product of palm slag composites ha s been investigated. The plate product of palm slag composites w as compacted on a compression molding machinery using jig and fixture. Jig and fixture were modeled by finite element simulation to determinestress distributions of a jig and fixture. An advantage of having a finite element model of a compression molding machinery is that it can be quickly altered by designers .Further improvement of plate product compactnes can be tested througha manufacturing si m ula tion. The influence of geometric shapes under static compression of compactor components w as studied in detailed . The results show s that the geometric shapes of jig need to be improved against the stress concentration area. The length of fixture plate from supported location must be reduced against the maximum deflection at the end of fixture plate.
Department of Mechanical Engineering, Universitas Riau, Pekanbaru, 28293, Indonesia
Testing Noisy of Machine DLE Gas Engine-30 by Using Numerical Analysis and Digital Signal Processing Method for The Application of Active Noise Control on Case Studies Drone
DLE Gas Engine-30 is 2 stroke engine commonly used on the drone. This machine is relatively noisy, so if used on a reconnaissance drone was not ideal. Therefore, this machine should be muted her voice to a minimum in order to manipulate the drone which has a low noise. The aim of this study was to test the engine noise DLE Gas Engine- 30. This study is the second phase that will continue in the ultimate goal of this dissertation is to make Active Noise Control systems for drones. The initial steps before testing drones performances done then first tested the noise of the engine DLE Gas Engine 30. This test is processed using the method of numerical simulation and digital signal processing FFT. In the numeric data input stage must input image of the machine Gas Engine DLE-30, then analyzed. Furthermore, the data is processed by the FFT noise digital signal processing. Both simulation after receiving the data measuring instrument with measurement sphericall field. Results of tests simulating the noise of the engines DLE Gas Engine-30 can be concluded that the higher the engine rev more narrow sound frequency range, visible noise contour generated from the simulation results that the transmission of sound from the engine DLE Gas Engine-30 tend evenly in every direction. In the digital signal processing in the frequency range 3150 - 8000 Hz which has been compared to engine speed 2000 rpm show a constant movement so that the condition of Active Noise Control engine DLE Gas Engine-30 vs Noise Signal Generators with input data one by one there is reduction of the signal from the point of -0, 4 to point 0.7 Hz.
Members of the Laboratory Noise and Vibration Research Centre, Lecturer at Mechanical Engineering Dept, University of Sumatera Utara., Jalan Almamater, Kampus USU, Padang Bulan, Medan 20155, Indonesia
Globally SMEs face challenges from competitions which drive them to strive to improve their performances on a regular basis. The purpose of this paper is to introduce the lean manufacturing approach as a means to improve productivity and management of the SMEsin Indonesian industries. This paper discussed and described the implementation of lean manufacturing tools and techniques which has evolved to be a form of corporate culture within the Indonesian manufacturing industries, especially for the SMEs. Moreover, this paper also discussed the “how to” aspect of improving the productivity of a given company as well as the management systems by identifying waste that occurs and reducing and/or removing the identified waste. Some case studies from the Indonesian manufacturing SMEs were presented to illustrate the implementation of the lean manufacturing approach. The outcomes of implementations from the case studies confirmed improvementsin performance for these SMEs as a result of adopting the lean manufacturing tool and techniques.
Department of Mechanical Engineering, Universitas Riau, Pekanbaru, 28293, Indonesia
Department of Mechanical & Construction Engineering, Northumbria University, Newcastle Upon Tyne, United Kingdom
