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INDONESIA
Jurnal Teknik Mesin Indonesia
Published by Badan Kerja Sama Teknik Mesin
ISSN : 1907350X     EISSN : 25977563     DOI : -
Core Subject : Engineering,
Aerospace Engineering Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Teknik Mesin Indonesia “JTMI” " adalah jurnal ilmiah sains dan teknologi yang diterbitkan oleh Badan Kerjasama Teknik Mesin Indonesia. JTMI meliputi bidang konversi energi, material, desain mekanikal, manufaktur dan otomasi
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 291 Documents
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Penerapan Metode Taguchi-GRA untuk Optimasi Kebulatan, MRR dan Kekasaran Permukaan pada Proses Bubut Am. Mufarrih; Hesti Istiqlaliyah
Jurnal Teknik Mesin Indonesia Vol 13 No 2 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v13i2.106

Abstract

This research was conducted to optimize turning process with several quality characteristics based on orthogonal array using Taguchi-GRA method. Experiments were carried out by varying the turning process variables such as depth of cut, material removal rate and cutting speed. Some of the quality characteristics that are optimized are roundness, MRR and surface roughness. The experimental design uses L9 orthogonal array. The experimental results show that machining performance in the turning process can be effectively improved through this method. The GRG value representing several quality characteristics increased by 34% from 0.7017 to 0.9403.
Penentuan posisi retak pada balok dengan tumpuan bebas-bebas melalui analisis kurva modus getar Ferdian Kusuma; Meifal Rusli; Lovely Son; Mulyadi Bur
Jurnal Teknik Mesin Indonesia Vol 12 No 1 (2017): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (894.403 KB) | DOI: 10.36289/jtmi.v12i1.71

Abstract

Crack is a problem that frequently found in a structure. Identification of crack is a crucial aspect in decision making about structure condition. Structural Health monitoring has become a solution to detect the crack. Basically, if a crack initiates and propagates in a structure, the natural frequencies of the structure will change because of decreasing stiffness and abrupt curvature of mode shapes will occur. This research is developed from before research and aimed to identify the crack position in a free free cantilever beam experimentally by analytically using finite element model (FEM) and experimental modal analysis (EMA). First, a perfect cantilever beam without any cracks is modeled by FEM and identified by EMA. Then artificial cracks are created to the beam with single and two cracks, and FEA model and EMA identification is developed. The position of the crack then is identified by the change of mode shape curvature using curvature change index that obtained from the difference in mode shape curvature between the damage and the undamaged cases, and mode shape curvature based on curvature sensitifity caused by decreasing stiffness caused by cracks.The result shows that mode shape curvature has better sensitifty to detect the position of cracks, and results of experiment show good corelation with results of finite element analysis.
Pengembangan prototipe mesin pencacah rumput laut yang telah melalui proses alkalisasi (ATC) M Marsono; S Septian
Jurnal Teknik Mesin Indonesia Vol 13 No 1 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v13i1.90

Abstract

Carrageenan which is needs in food processing industry, either in Indonesia or in the world continues to increase due to the growth of the world population. One of the variants of carrageenan recognized world is SRC (Semi Refined Carrageenan) with standard E407A. SRC can be produced from ATC (Alkali Treated Cottonii). To produce SRC flour, dried ATC must be chopped first and then proceed with the grinding process. Field studies that have been done give a picture that the seaweed chopping machine that available on the market has not effective and efficient to chopp dry ATC. In this research, the prototype of ATC Chopping machine was developed with slicing mechanism through the pairs of rotating blade and fixed blade. From testing that has been perfomed, the results shows that slicer mechanism capable to chopp dry ATC with variation of length between 1cm to 3 cm and minimum production capacity of 180 kg/h.
Analisa pengaruh fraksi massa penguat sio2 terhadap kekuatan impak dan struktur mikro pada komposit matrik aluminium menggunakan metode stir casting Grahardian Adi Kusumo; Purwadi Joko Widodo; Wahyu Purwo Raharjo
Jurnal Teknik Mesin Indonesia Vol 11 No 2 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (783.38 KB) | DOI: 10.36289/jtmi.v11i2.53

Abstract

AMC (Aluminium Matrix Composite) using stir casting method is one of the best way to get superior material. This research is to find out the mass fraction influence of reinforcement SiO2 to impact strength and micro structure on aluminium matrix composite. On this research, mass fraction of reinforcement varied between 3%, 6% and 9%. The making of composite use stir casting method. Specimen test is using optics microsope and impact charpy testing machine. The result of research show that increasing SiO2 can increase the impact strength. The highest impact strength happened at specimen 9% mass fraction of SiO2 (0,363 J/mm2). Observation of micro structur show good bonding between reinforcement and matrix on composite.
Simulasi drag-type turbine ditinjau dari pengaruh variasi sudut kelengkungan sudu untuk diaplikasikan dalam pipa air Muh. Alwan Rosyidi; Syamsul Hadi; Dominicus Danar Dono Dwi Prija Tjahyana
Jurnal Teknik Mesin Indonesia Vol 12 No 1 (2017): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (848.937 KB) | DOI: 10.36289/jtmi.v12i1.65

Abstract

The high rainfall and the high-rise building in urban areas are important potential factor in developing the alternative energy. A concept of Horizontal Axis Water Turbine is proposed as a media to generate the electrical energy with low head condition. This research focuses on the effect of various blade curvature angle on Drag-type Turbine with simulation method. The purpose of this research is to find the maximum performance from a various blade curvature angle of 100°, 110°, 120°, 130°, 140°, and 150°. The result is the maximum performance obtain at blade curvature angle 150° with torque value 16,8 Joule.
Pengaruh campuran biodiesel minyak rumput laut gracilaria verrucosa dengan bahan bakar solar terhadap unjuk kerja dan emisi gas buang mesin diesel Moch. Taufiq Ichsan; Samsudin Anis; Dwi Widjanarko
Jurnal Teknik Mesin Indonesia Vol 13 No 1 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (450.226 KB) | DOI: 10.36289/jtmi.v13i1.84

Abstract

Tujuan penelitian ini adalah untuk mengetahui pengaruh campuran biodiesel minyak rumput laut gracilaria verrucosapada bahan bakar solar terhadap unjuk kerja dan emisi gas buang mesin diesel.Produksi biodiesel minyak rumput laut menggunakan metode transesterifikasi. Variasi campuran biodiesel yang digunakan pada bahan bakar solar yaitu sebesar B-0, B-5, B-10, dan B-15 dan putaran mesin (rpm) yang digunakan pada 1600, 1800, 2000, 2300 dan 2500. Pengujian unjuk kerja mesin diesel menggunakan eddy current dynamometer. Hasil penelitian menunjukkan bahwa campuran biodiesel B-10 menghasilkan unjuk kerja dan emisi gas buang mesin diesel yang optimal dibanding campuran lainnya.
Pengaruh penambahan sekam padi terhadap kuat tekan dan penyerapan air bata ringan jenis cellular lightweight concrete (clc) Sulistyo Widiatmoko; Heru Sukanto; Purwadi Joko Widodo
Jurnal Teknik Mesin Indonesia Vol 11 No 1 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (740.411 KB) | DOI: 10.36289/jtmi.v11i1.48

Abstract

Lightweight concrete foam technology obtained by adding foaming agent (liquid form) into the concrete mix. Lightweight concrete has more advatages than conventional bricks. Lightweight concrete can reduce more structural weight on building. This research use rice husk as an added ingredient on lightweight concrete. The main objective of this study is to investigate the effect of rice husk addition on compressive strength and water absorption of cellular lightweight concrete. Variation of rice husk adding on lightweight concrete is 0% ; 0,25%; 0,5%; 0,75%; and 1%. Compressive Strength and Water Absorption test were performed using SNI 3421-2011 and SNI 03-0349-1989 standard respectively. Density test was performed to ensure that sample specimens appertain lightweight concrete. The observations during the experiment and test show that the lightweight concrete with 0,5% addition of rice husk has the highest value of compressive strength which 5.30 Mpa. The value of water absorption is directly proportional to the addition of rice husk, where the highest value shown on 1% addition of rice husk. Increasing value of water absorption occurs because rice husk can keep water and can’t easy to remove water content when be dried.
Smart lower limb prosthetic based On accelerometer and gyroscope sensor with arduino microcontroller Ahmad Suudi; Ahmad Su'udi; M Martinus
Jurnal Teknik Mesin Indonesia Vol 14 No 1 (2019): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (621.047 KB) | DOI: 10.36289/jtmi.v14i1.102

Abstract

Prosthetic dalam penggunaannya secara umum sering menyebabkan masalah bagi penggunanya terutama stump yang terluka akibat penggunaannya yang cukup lama dan untuk alasan itu penelitian ini dilakukan. Penelitian ini menggunakan resin dan fiberglass sebagai bahan pembuatan soket prosthetic, sensor accelerometer dan gyroscope sebagai sensor utama. Prosthetic yang dibuat dilengkapi dengan early warning system sebagai peringatan bahwa pengguna prosthetic telah mencapai batas aman sehingga pengguna dapat meminimalisir terjadinya luka pada stump. Hasil penelitiannya adalah berat hasil akhir prosthetic sebesar ± 1,2 kg dengan foot yang memiliki panjang ± 25 cm dan lebar ± 8,8 cm serta memiliki tinggi secara keseluruhan sebesar ± 53,4 cm. Nilai sudut yang dijadikan sebagai batas jumlah langkah pada early warning system yang diperoleh dari penelitian ini adalah 34,750. Kata kunci : prosthetic, accelerometer dan gyroscope, sudut, early warning system
Pengaruh waktu pengepresan terhadap sifat mekanik komposit kenaf / polypropylene Sahid Bayu Setiajit; Heru Sukanto; Wijang Wisnu Raharjo
Jurnal Teknik Mesin Indonesia Vol 11 No 2 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (823.687 KB) | DOI: 10.36289/jtmi.v11i2.60

Abstract

Natural fiber composite is the one of eco friendly composite. Natural fiber such as jute, banana,rosella, rami and kenaf are able tobe a good reinforcement material for thermoset or thermoplast composite. Composit using natural fiber reinforcement can be upgraded by adding more pressing time in the forming process. The aim of this research is to investigate the influence of pressing time adding variation towards mechanical properties of mat composite of kenaf- PP fiber. Mat composite of kenaf- PP fiber is processed by using simple hot press method. The temperature used in the pressing process is 180 0C with 7bar of pressure. The variation of pressing time are 5, 10, 15, 20,25 minutes. Mechanical properties that have been tested are tensile, bending, impact and density. The facture of the composite is observed using scanning electron microscopy (SEM). The 25 minutes pressing time variation resulting the bending and tensile strength of mat composite of kenaf- PP fiber respectively : 39,37 MPa and 25,27 Mpa. The highest impact strength is 20,25 kJ/m2 from 5 minutes of variation of pressing time.
Penggunaan load cell jenis extended octagonal ring transduser untuk uji buckling pada beam Muhammad Irham Maulana; Soeharsono .; Tono Sukarnoto
Jurnal Teknik Mesin Indonesia Vol 12 No 2 (2017): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (873.241 KB) | DOI: 10.36289/jtmi.v12i2.78

Abstract

Penelitian ini dilakukan untuk mengetahui karakteristik dan sensitivitas dari transduser gaya jenis Extended Octagonal Ring (EOR). Analisis dibagi menjadi dua yaitu menggunakan metode elemen hingga dan pengujian eksperimental. Sensitivitas EOR ditentukan melalui pengujian eksperimental dengan pembebanan vertikal 100 N hingga 500 N. Analisis metode elemen hingga menggunakan software ANSYS dengan pembebanan 3 kN hingga 15 kN disesuaikan dengan beban kritis buckling. Hasil pengujian menunjukan linearitas dan sensitivitas silang pada EOR. Pengujian eksperimental diperoleh sensitivitas EOR diperoleh sebesar Kv = 0.1999 μs.N-1 untuk gaya vertikal dan Kh = 0.0056 μs.N-1 untuk gaya horizontal dengan sensitivitas silang sebesar 2.8 %. Analisis metode elemen hingga diperoleh sensitivitas EOR diperoleh sebesar Kv = 0.1858 μs.N-1 untuk gaya vertikal, Kh = 0.0018 μs.N-1 untuk gaya horizontal dan Km = 0.007 μs.N-1 untuk momen dengan sensitivitas silang sebesar 0.9 % dan 3.76 %. Selanjutnya, EOR dapat digunakan sebagai transduser untuk analisis buckling.

Page 4 of 30 | Total Record : 291

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