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AUSTENIT
Published by Politeknik Negeri Sriwijaya
ISSN : 20851286     EISSN : 26227649     DOI : https://doi.org/10.53893/austenit
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
AUSTENIT (pISSN 2085-1286 and eISSN 2622-7649) is a peer-reviewed open access journal published by Mechanical Engineering Department, Politeknik Negeri Sriwijaya. Focused on original articles in the form of technical and vocational research results or literature review which provides insight in the field of mechanical engineering and machinery that includes Mechanical Structure, Manufacturing, Metallurgy Sciences and Engineering, Design Engineering, Maintenance and Repair Engineering, Fluid Dynamics, HVAC (Heating, Ventilation and Air Conditioning), Heat-Mass Transfer, Sustainable Renewable Energy, Mechatronic and Control Systems or as well as other related Mechanical Engineering field study.
Arjuna Subject : -
Articles 227 Documents
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AIR MOISTURE ANALYSIS OF POTATO DEHUMIDIFICATION PROCESS USING THE REFRIGERATION SYSTEM HIDAYATI, BAITI; ., Baharuddin; Wahyudi, Reza
AUSTENIT Vol. 12 No. 1 (2020): AUSTENIT: April 2020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

The refrigeration system is one of the technologies used to condition thetemperature of the air either by heating or cooling, in general refrigeration iscommonly used for human comfort needs and also for the freezing process. Inthis research, refrigeration is used for the process of drying potatoes using adehumidification method, which is the reduction of moisture in the air vapor.Potatoes will be cooled using a refrigeration process and then will be heatedusing a heater, data collection is carried out at a temperature of 600C heater, withdata collection each of 60 minutes, 120 minutes and 180 minutes. From theresults obtained, the dehumidifier method using a refrigeration system can drypotatoes to shrink 60% and humidity can be reduced to 83.3%.
ANALISIS SUBSISTEM RAMP UNTUK MENAIKI TANGGA PADA MOBIL ROBOT LIPI VERSI 1 (MOROLIPI V1) Saputra, Hendri Maja
AUSTENIT Vol. 12 No. 1 (2020): AUSTENIT: April 2020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

Paper ini membahas secara rinci analisis sistem menaiki tangga (ramp) pada prototipe mobil robot penjinak bom versi 1 (morolipi v1). Analisis perlu dilakukan agar secara ilmiah dapat dibuktikan bahwa robot berfungsi sesuai dengan yang didesain. Analisis menggunakan pendekatan kinematika klasik untuk mendapatkan gaya dan momen yang bekerja pada mekanisme penggerak saat menaiki tangga. Berdasarkan analisis melalui simulasi dan eksperimen yang dilakukan maka dapat disimpulkan bahwa desain mobil robot dapat terbukti dapat bekerja dengan baik untuk ramp mobil robot menaiki tangga dengan kemiringan maksimal 42 derajat. Momen paling besar ketika menaiki tangga di sudut kemiringan 30 derajat dengan koefisien gesek 0,9. 
ANALISIS SUBSISTEM RAMP UNTUK MENAIKI TANGGA PADA MOBIL ROBOT LIPI VERSI 1 (MOROLIPI V1) Saputra, Hendri Maja
AUSTENIT Vol. 12 No. 1 (2020): AUSTENIT 12012020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.4547822

Abstract

Paper ini membahas secara rinci analisis sistem menaiki tangga (ramp) pada prototipe mobil robot penjinak bom versi 1 (morolipi v1). Analisis perlu dilakukan agar secara ilmiah dapat dibuktikan bahwa robot berfungsi sesuai dengan yang didesain. Analisis menggunakan pendekatan kinematika klasik untuk mendapatkan gaya dan momen yang bekerja pada mekanisme penggerak saat menaiki tangga. Berdasarkan analisis melalui simulasi dan eksperimen yang dilakukan maka dapat disimpulkan bahwa desain mobil robot dapat terbukti dapat bekerja dengan baik untuk ramp mobil robot menaiki tangga dengan kemiringan maksimal 42 derajat. Momen paling besar ketika menaiki tangga di sudut kemiringan 30 derajat dengan koefisien gesek 0,9. 
PEMBUATAN DAN PENGUJIAN SIFAT MEKANIK KOMPOSIT BAHAN SERAT FIBERGLASS DAN SERAT DAUN NANAS DENGAN MATRIK RESIN POLYESTER PADA PANEL PANJAT DINDING Yunus, Moch; Arnoldi, Dwi; Prakarsa, Cakra Puitra
AUSTENIT Vol. 12 No. 1 (2020): AUSTENIT: April 2020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (521.003 KB)

Abstract

Serat daun nanas merupakan salah satu komponen yang sering dibuang pada tanaman nanas.Tanaman nanas yang berbahasa latin ananas comosus pada umumnya termasuk jenis tanaman semusim dan memiliki daun yang panjang dan mirip dengan tanaman lidah buaya. Daun nanas ini memiliki banyak manfaat, salah satunya serat pada daun nanas yang dapat digunakan sebagai bahan penguat pada pembuatan material komposit. Tujuan dari penelitian ini untuk menganalisis pengaruh dari varisi berat serat daun nanas dengan serat fiber yang di aplikasikan ke panel panjat dinding. Metode yang digunakan adalah metode uji  tarik dan uji bending dengan variasi serat daun nanas (100 gram, 5 gram, 3 gram) dan variasi serat fiber (5 gram, 7 gram). Hasil penelitian ini menunjukkan bahwa spesimen 3 gram serat daun nanas + 7 gram serat fiber memiliki nilai rata-rata tegangan tarik sebesar 10,601 N/mm2 dan tegangan bending sebesar 13,534 N/mm2. Penelitian ini tidak dapat dijadikan referensi untuk pembuatan panel panjat dinding, tapi dapat dilihat nilai kekuatan perpaduan antara serat fiber dan serat daun nanas. Hasil penelitian ini menyatakan bahwa hasil pada komposit tidak dapat dijadikan untuk pembuatan panel panjat dinding, karena nilai kekuatan perpaduan antara serat fiber dan serat daun nanas terlalu rendah dari standar BSAPI yaitu t uji = 10,601 N/mm2   t standar = 22,555 N/mm2, dan b uji = 40,601 N/mm2   b standar = 112,776 N/mm2.
PEMBUATAN DAN PENGUJIAN SIFAT MEKANIK KOMPOSIT BAHAN SERAT FIBERGLASS DAN SERAT DAUN NANAS DENGAN MATRIK RESIN POLYESTER PADA PANEL PANJAT DINDING Yunus, Moch; Arnoldi, Dwi; Prakarsa, Cakra Puitra
AUSTENIT Vol. 12 No. 1 (2020): AUSTENIT 12012020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (521.003 KB) | DOI: 10.5281/zenodo.4547826

Abstract

Serat daun nanas merupakan salah satu komponen yang sering dibuang pada tanaman nanas.Tanaman nanas yang berbahasa latin ananas comosus pada umumnya termasuk jenis tanaman semusim dan memiliki daun yang panjang dan mirip dengan tanaman lidah buaya. Daun nanas ini memiliki banyak manfaat, salah satunya serat pada daun nanas yang dapat digunakan sebagai bahan penguat pada pembuatan material komposit. Tujuan dari penelitian ini untuk menganalisis pengaruh dari varisi berat serat daun nanas dengan serat fiber yang di aplikasikan ke panel panjat dinding. Metode yang digunakan adalah metode uji  tarik dan uji bending dengan variasi serat daun nanas (100 gram, 5 gram, 3 gram) dan variasi serat fiber (5 gram, 7 gram). Hasil penelitian ini menunjukkan bahwa spesimen 3 gram serat daun nanas + 7 gram serat fiber memiliki nilai rata-rata tegangan tarik sebesar 10,601 N/mm2 dan tegangan bending sebesar 13,534 N/mm2. Penelitian ini tidak dapat dijadikan referensi untuk pembuatan panel panjat dinding, tapi dapat dilihat nilai kekuatan perpaduan antara serat fiber dan serat daun nanas. Hasil penelitian ini menyatakan bahwa hasil pada komposit tidak dapat dijadikan untuk pembuatan panel panjat dinding, karena nilai kekuatan perpaduan antara serat fiber dan serat daun nanas terlalu rendah dari standar BSAPI yaitu t uji = 10,601 N/mm2   t standar = 22,555 N/mm2, dan b uji = 40,601 N/mm2   b standar = 112,776 N/mm2.
STUDI EKSPERIMENTAL: ANALISA KEGAGALAN RODA GIGI PADA GEAR BOX MESIN SCREW PRESS KELAPA SAWIT Krisna, Pratama Pela; ., Taufikurahman; Sundari, Ella
AUSTENIT Vol. 12 No. 2 (2020): AUSTENIT: Oktober 2020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

The gear is a connecting component or power transmission of a machining process, if there is damage to the gears of an engine then this results in the inability to work on a machine. In this study, the damage to the gear of the screw press was broken and split so that several tests were used, namely the hardness test, the metallographic test and the composition test. The results showed that the damage occurred due to the lack of hardness in the gear where the hardness value of the screw press gear was 144.457 kg / mm² while the minimum hardness based on ASTM A291 was around 170-230 kg / mm². In the metallographic test, it can also be seen that there are cracks in the material structure of the screw press gear which causes the teeth to break and split. The composition test was carried out and it was found that the gear material contained a high enough carbon element, namely 5.05%, with this carbon value it could be concluded that the type of gear material for the screw press machine was cast iron with the addition of several alloys. Keywords:   Gears, Screw Press machine, Gear Box, Brinnel-Test, Metallography
PEMANFAATAN LIMBAH ASAP DARI BATOK KELAPA DENGAN MESIN PENYULING ASAP CAIR DI KABUPATEN BANYUASIN Sampurno, Rachmat Dwi; Homzah, Ozkar F.; Suryana, Didi; Sani, Almadora Anwar; Alexander, Willy
AUSTENIT Vol. 13 No. 1 (2021): AUSTENIT: April 2021
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

Batok Kelapa merupakan salah satu bahan yang dapat diproses dalam pembuatan asap cair. Proses produksi arang dari batok kelapa secara tradisional yaitu dengan metode drum klin berpotensi menimbulkan polusi udara. Mesin penyulingan asap cair berbasis mikrokontroller bertujuan untuk membantu para pembuat arang dalam meminimalisisr dampak kesehatan akibat polusi udara dari asap serta menambah pendapatan berupa produk asap cair. Hasil pengujian prototipe diharapkan dapat meningkatan hasil produksi asap cair yaitu membandingkan menggunakan media air dengan temperatur ± 29°C dan menggunakan  refrigerasi yangmana temperatur air diturunkan sampai 15°C dengan pengontrolan mikrokontoller-Arduino UNO. Berdasarkan hasil pengujian di Desa Tanjung Lago Kabupaten Banyuasin diperoleh produk berupa asap cair tanpa sistem refrijerasi sebanyak 203 ml dan penyulingan dengan menggunakan sistem refrijerasi sebanyak 375 ml asap cair.
PROSES PENGOLAHAN LIMBAH B3 (OLI BEKAS) MENJADI BAHAN BAKAR CAIR DENGAN PERLAKUAN PANAS KONSTAN Ariasya, Muhammad Ade; ., Azharuddin; Sani, Almadora Anwar
AUSTENIT Vol. 12 No. 2 (2020): AUSTENIT: Oktober 2020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

The use of waste used oil is increasing every year, the resulting waste will also increase. Waste used oil is included in B3 waste which needs special handling. In line with the development of cities and regions, the volume of used oil continues to increase in line with the increase in the number of motorized vehicles and motorized machines. Even in rural areas, you can find small workshops, one of which is used oil. . In other words, the distribution of used oil is very wide from big cities to rural areas throughout Indonesia. The process in this research is changing the waste used oil into liquid fuel with the constant heat treatment. It is aimed to know the best result in the temperature of 250°C, 300°C and 350°C with pyrolysis process. The increase of temperature has a big effect toward the result of the exchanging process. The best result is at the temperature of 350°C which the volume got from the tap A is 1 liter and from the tap B is 0.2 liter. Than the tap sample A was tested against the exiting fuel standards. Based on the result of the specification test on the process of changing waste used oil, it was found that there were many weaknesses like the high viscosity value and the high content of water in the resultant product. But for other physical properties had fulfilled the standard of the fuel.Keywords: Temperature, used oil, pyrolysis, liquid fuel. 
INVESTIGATION OF STRESS ON MULTI-LEVEL SHAFT USING FINITE ELEMENT METHOD BASED ON COMPUTER-AIDED ENGINEERING Chandra, Hendri; Putra, Dicky Pratama; Romli, Romli
AUSTENIT Vol. 13 No. 1 (2021): AUSTENIT: April 2021
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

The shaft is a rod that is part of the engine element with a circular cross-section that functions to move rotation without continuing power. Research on the stress concentration factor on the shaft continues to be developed significantly to mitigate torsional loads, bending loads, and axial loading. This study investigates the stress on a multilevel shaft using three methods: the engineering design method, simulation method, and analysis using the finite element method to obtain the investigated stress value based on computer-aided engineering. The material used in the shaft test is AISI 1020 steel with two research variables, namely, the independent variable with radius (mm); 0 mm, 2 mm, 6 mm, 10 mm, 20 mm, 50 mm, and the dependent variables are von mises and displacement. Based on the results of the test investigations that have been carried out by simulating the shaft, it can be concluded that the addition of radius material as the investigated variable by applying a torque of 50 N.m will reduce the stress on the shaft, and this does not apply to the displacement that occurs on the shaft when the force or load is working.
PENERAPAN SISTEM REFRIGERASI PADA ALAT PEMBUAT ASAP CAIR UNTUK PENGOPTIMALAN HASIL PRODUKSI Sumarna, Herlin; ., Haryanto; Hidayati, Baiti; Homzah, Ozkar F
AUSTENIT Vol. 12 No. 2 (2020): AUSTENIT: Oktober 2020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

Recently, liquid smoke is widely used for various needs, both for food purposes and for freezing rubber latex. Liquid smoke began to grow due to the large demand, also using biomass / waste as a base material. Immediate production results are needed by the condensation process. The application of the refrigeration system guides the temperature of the air which is used as a cooling medium in the condensation process during the process of making liquid smoke. This study uses coconut shell as raw material for pyrolysis, and there are 4 temperature variations that are applied in the liquid smoke production process. First without a refrigeration system, the application of a refrigeration system with temperature variations of 22 ° C, 18 ° C and the last one is 15 ° C. The data is taken every 30 minutes for 6 hours. Based on the research results, it was found that the maximum production results using the refrigeration system at an air temperature of 15 ° C, resulted in 375 ml of liquid smoke. Keywords: Liquid Smoke, Refrigeration, Pyrolysis, Coconut Shell

Page 15 of 23 | Total Record : 227

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