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All Journal Jurnal INTECH Teknik Industri Universitas Serang Raya Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) Jurnal Polimesin Recent in Engineering Science and Technology
Dewi, Anissa Puspa
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Optimalisasi Tata Letak Fasilitas Produksi dengan Pendekatan Ergonomi dan Efisiensi Dewi, Anissa Puspa; Agus Edy Pramono
Jurnal INTECH Teknik Industri Universitas Serang Raya Vol. 10 No. 2 (2024): Desember
Publisher : Universitas Serang Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30656/intech.v10i2.8855

Abstract

Penelitian ini bertujuan untuk mengevaluasi tata letak fasilitas workshop veneer kayu guna meningkatkan efisiensi dan mengurangi risiko kesehatan operator. Laminated Veneer Lumber (LVL) dipilih sebagai fokus karena keunggulan kekuatan dan ketahanannya. Namun, proses produksi LVL menghasilkan limbah berbahaya, serta jarak antar fasilitas yang terlalu jauh mengakibatkan pemborosan energi operator dan mempengaruhi kesehatan pekerja. Salah satu urgensi perbaikan tata letak adalah kemampuannya mereduksi jarak perpindahan untuk large component product serta desain layout yang memisahkan proses pengecatan dari ruang perakitan, guna menghindari paparan zat kimia berbahaya pada operator lain. Evaluasi ergonomi dilakukan menggunakan kuesioner Nordic Body Map (NBM) untuk menilai risiko musculoskeletal disorders (MSD's) pada operator. Observasi dan wawancara lapangan mengidentifikasi masalah tata letak, yang dianalisis menggunakan Activity Relationship Chart (ARC) dan Standard Weighted Sum Method (SWS). Hasil pengukuran menunjukkan jarak perpindahan awal antar fasilitas sebesar 94,5 meter. Dengan implementasi layout alternatif, jarak tersebut berkurang menjadi 51,8 meter untuk Alternatif 1 dan 52,8 meter untuk Alternatif 2, yang menghasilkan pengurangan jarak tempuh hingga 45,2%. Layout Alternatif 2, dengan skor tertinggi 242,7 dalam SWS, terbukti lebih unggul dalam mereduksi jarak perpindahan komponen besar dan mengurangi paparan zat kimia melalui pemisahan ruang pengecatan. Perbaikan tata letak ini diharapkan dapat meningkatkan efisiensi produksi, keselamatan, dan kenyamanan kerja operator.
Crack Analysis of Polyoxymethylene Reinforce Glass Fibre Material on Locker Table Nidhar, Ainun; Auberta, Genia; Dewi, Anissa Puspa; Heryana, Ghany
Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) Vol 9, No 2 (2024): Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mecha
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/jtmm.v9i2.5488

Abstract

Polyoxymethylene (POM) is a type of thermoplastic that is frequently used in various industrial applications due to its good dimensional stability, corrosion resistance, and superior tensile strength. However, in certain applications such as locker tables, the weakness of this material is revealed in structural failures. This research uses the finite element simulation method to analyse the failure of a locker table exposed to a helical torsion spring. The main focus was on the fracture of the part connected to the helical torsion spring, a common problem in plastic material applications subjected to cyclic loading. Results showed that the fracture occurred at a stress level of 121.061 MPa, exceeding the yield strength value that should have been broken at 150 MPa. In addition, the analysis showed that the highest Von Misses stress occurred where the spring was located, exceeding the specified yield strength. Tensile tests showed the effect of ambient temperature on the tensile strength of the POM+25%GF material. The proposed solution through the development of an additional structure in the form of ribs on the product successfully increased the strength of the locker table under load. This research provides important insights in improving product design to minimise the risk of structural failure in POM+25%GF material.
Bahasa Inggris Pramono, Agus Edy; Setyadi, Iman; Zuhri, Aminudin; Dewi, Anissa Puspa; Indayaningsih, Nanik
Recent in Engineering Science and Technology Vol. 3 No. 02 (2025): RiESTech Volume 3 No. 02 Years 2025
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v3i2.95

Abstract

This paper compares the electrical conductivity of LLDPE-carbon composite materials, LLDPE-carbon-aluminum composites, and LLDPE-carbon-copper composites. Doping with aluminum (Al) and copper (Cu) metal powders influences electrical conductivity in carbon-based polymer composite materials. Adding metal powders as secondary fillers to a mixture of conductive carbon powders and LLDPE can decrease electrical conductivity. This is due to the agglomeration or clustering of metal powders within the polymer matrix, which disrupts conductive pathways and diminishes the efficiency of electrical charge transfer. The impact of filler type and quantity on electrical conductivity in composite materials was examined, and the findings revealed that factors such as the filler's amount, shape, and dispersal significantly affect the composite's electrical resistance properties. Increasing the amount of metal powder filler raises the composite's viscosity, reducing adhesion between the metal and polymer fillers while promoting metal-to-metal contacts.
Study on the impact of natural graphite amount and dispersion on the electrical performance of PET/graphite composites Pramono, Agus Edy; Dewi, Anissa Puspa; Nufus, Tatun Hayatun; Indayaningsih, Nanik
Jurnal Polimesin Vol 23, No 3 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i3.6872

Abstract

Polymer composites have experienced rapid development in recent decades due to their ability to integrate mechanical, thermal, and electrical properties tailored for specific applications. One of the major challenges in polymer development is improving electrical conductivity, as most polymers are inherently insulating. To address this, various conductive fillers such as carbon black, graphite, carbon nanotubes, and graphene have been utilized. This study investigates the effect of natural graphite loading on the electrical conductivity, microstructure, and porosity of virgin Polyethylene Terephthalate (PET) composites. Composites containing 10%, 20%, and 30% graphite by weight were fabricated using the hot compaction method. Morphological analysis via Scanning Electron Microscopy (SEM) revealed that higher graphite content enhances filler connectivity, with the formation of conductive pathways beginning at 20% and a continuous network forming at 30%, despite some agglomeration and weak interfacial bonding. Density measurements and porosity analysis indicated that increasing graphite content leads to greater porosity, with the 30% composite reaching 19.68%. Electrical conductivity increased significantly with increasing graphite loading, exhibiting a transition from insulating to conductive behavior. The percolation threshold was identified at approximately 13.2 wt%, with conductivity rising from 0.00347 S/m at 10 wt% to 6.97 S/m at 30 wt%, consistent with classical percolation theory. These findings demonstrate that natural graphite is an effective conductive filler for PET-based composites and that its content must be optimized to balance conductivity with structural integrity.
Co-Authors Ainun Nidhar, Ainun Auberta, Genia Ghany Heryana Nanik Indayaningsih Pramono, Agus Edy Setyadi, Iman Tatun Hayatun Nufus Zuhri, Aminudin