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Efisiensi Model Mesh Kasus Deteksi Simulasi Korosi Beton Bertulang Menggunakan Metode Axisymmetric Mesh Problem Muhammad Ihsan; Herdi Susanto
Jurnal Mekanova: Mekanikal, Inovasi dan Teknologi Vol 6, No 2 (2020): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1436.44 KB) | DOI: 10.35308/jmkn.v6i2.2822

Abstract

In this study, a computational numerical modelling for corrosion simulation in reinforcing steel is developed. The corrosion simulation using Boundary element Method (BEM) and focusing for cylindrical reinforced concrete (RC). The main problem is high performance computer was required for the reinforced concrete corrosion simulation. Therefore, main purpose of this study is to reduce the needs of high-performance computer during the corrosion simulation. For the purpose, axisymmetric computational problem was integrated to the numerical BEM that considered able to reduce the computational effort. On the analysis process, the whole axial RC structures column was modeled by Laplace equation. The boundary condition for the corroded and non-corroded areas on the reinforcing steel (rebar) were represented by their established polarization curve. The Laplace equation was solved by BEM, thereby the potential on the structure can be analyzed. The simulation results show the similar potential distribution between BEM computational modelling by triangle element mesh and improvement BEM using axisymmetric element mesh problem. The simulation shows a significant differences, thereby the corrosion simulation using axisymmetric element mesh problem significantly reduces the computer effort in term of time-consuming and computer effort for the simulation. Thus, the improvement of the axisymmetric modelling for BEM becomes a powerful method for reducing the computational effort in term of cylindrical reinforcing steel corrosion simulation. Keywords— corrosion modelling, axisymmetric, BEM, cylindrical column, reinforced concrete
Laju Korosi Atmosferik Kawasan Pesisir dan Rural Di Kabupaten Aceh Barat Pasca Tsunami 2004 Herdi Susanto; Joli Supardi; M Ridha; Syifaul Huzni; S Fonna
Jurnal Mekanova: Mekanikal, Inovasi dan Teknologi Vol 2, No 2 (2016): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1159.791 KB) | DOI: 10.35308/jmkn.v2i2.834

Abstract

Korosi merupakanpenyebab utama kegagalan dini banyak infrastuktur yang berada di daerah pesisir. akibat bencana gempa dan tsunami Desember 2004 Perubahan iklim disepanjang garis pantai Barat Selatan Aceh semakin tinggi, kerusakan tersebut berdampak pada lingkungan sekitarnya, angin menjadi lebih kencang dan kandungan garam klorida dalam udara menjadi meningkat hal ini memacu peningkatan laju korosi atmosferik pada konstruksi-konstruksi yang terbuat dari logam, Penelitian ini bertujuan untuk mengkaji dampak perubahan laju korosi atmosferik yang terjadi pada kawasan tsunami yang berjarak dibawah 5 km dari pinggir pantai terhadap kawasan yang tidak dilanda tsunami yang berjarak diatas 5 km dari pinggir pantai, untuk logam kontruksi yang sering digunakan oleh masyarakat untuk infrastruktur. Enam lokasi penelitian pengukuran laju korosi atmosferik dipilih, yaitu: Pasi Ujong Kalak, Peunaga Pasi, Kubang Gajah penelitian tahun 2014 kawasan pesisir dan Alue Peuyareng, Pasi Jambu, Paya Lumpat penelitian tahun 2015kawasan rural berdasarkanASTM G 50. Hasil penelitian lajukorosi atmosferik menunjukkan bahwa semakinjauh dengan pinggir pantai maka laju korosi atmosferik akan menurun rata-rata untuk baja tulangan 1,62 mpy, baja nako1,06 mpy, baja strip 2,95 mpy, baja siku 0,25 mpy, baja plat mencapai 0,67 mpy. Kata Kunci: korosi atmosferik, logam kontruksi,Aceh Barat, ASTM G 50
Uji Kebisingan pada Motor Listrik dan Tabung Sentifugal Mesin Produksi Santan Kapasitas 10 Liter Per Jam Herdi Susanto; Al Munawir; Herri Darsan
Jurnal Mekanova: Mekanikal, Inovasi dan Teknologi Vol 7, No 1 (2021): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (694.854 KB) | DOI: 10.35308/jmkn.v7i1.3755

Abstract

Noise standards on a machine are very important to consider before the machine is produced, because it can cause discomfort to the operator and damage hearing function. The noise standard has been set by OSHA, the maximum noise threshold value of 85 dB is considered safe for most workers when working 8 hours / day. The coconut milk production machine with a capacity of 10 liters per hour was carried out by measuring the noise level which aims to determine whether the machine meets the noise standard criteria. The test was carried out at three levels of motor rotation, namely 1000 rpm, 1500 rpm, 2000 rpm with a noise measuring distance of 0.5 meters from the component parts of the electric motor and centrifugal tube using a sound level meter. The results of measurements of noise levels on electric motors and centrifugal tubes of coconut milk production machines with a capacity of 10 liters per hour can be concluded that the noise level value of the production machine meets the noise standard level required by OSHA 1978, where the maximum production machine noise level is at 75 dB while that which is implied by OSHA 1978 maximum is at 85 dB. Keywords— OSHA standards, electric motor, centrifugal tube, noise test
Analisa Pengaruh Casting Speed dan Superheat Terhadap Cacat Permukaan Slab Baja Grade 1A0804 Herdi Susanto
Jurnal Mekanova: Mekanikal, Inovasi dan Teknologi Vol 2, No 1 (2016): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (626.093 KB) | DOI: 10.35308/jmkn.v2i1.844

Abstract

Increasing the life of the continuous casting machine causes a defect on the surface of the steel slab, it takes some corrective measures for the casting process, such as by redefining and updating the standard operating parameters that influence the casting process with a review of the surface defects. This research was conducted at the Division of Steel Slab Plant II PT. Krakatau Steel using casting machine kontiyu Low head machine with a straight mold, angle and transverse crack at grade steel slab 1A0804. The result showed the operating parameters are better at ≤ 1.30 casting speed <1.35 m/min and 250 <superheat ≤ 300 C. From these results it can be concluded that the standard operating parameters of continuous casting to casting speed of 1.4 m / min is important to be updated and superheat 300C can still be used Keywords : steel 1A0804, casting speed, superheat, angle crack, transverse crack
Uji Kemampukerasan Baja Tahan Karat AISI 304 Herdi Susanto; Pribadyo Pribadyo; Rahmad Novizar
Jurnal Mekanova: Mekanikal, Inovasi dan Teknologi Vol 3, No 1 (2017): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (508.36 KB) | DOI: 10.35308/jmkn.v3i1.859

Abstract

Baja tahan karat AISI 304 secara umum digunakan pada mesin-mesin konstruksi terapan sederhana seperti poros propeler kapal nelayan, mesin penghancur es, pemeras tebu dan lainnya, dikarenakan ketahanan korosifnya yang baik, disisi lain kelemahan AISI 304 pada kondisi lapangan sering mengalami deformasi dan kepatahan dengan putaran yang relatif tinggi. Untuk mengatasi hal tersebut dapat dilakukan usaha menambah nilai kekerasan permukaan dengan melakukan pengujian Jominy Hardenability. Pengujian Jominy yang dilakukan pada spesimen uji dengan standar ASTM A255-02, dengan laju air pada nozzle 45 liter/menit, pada temperature 8500C dan holding time 15-20 menit. Hasil pengujian menunjukkan bahwa nilai awal kekerasan permukaan pada ujung quenching sisi A adalah 187 HB dan pada sisi B adalah 170 HB. Nilai kekerasan permukaan setelah di normalizing pada ujung quenching sisi A adalah 182 HB dan pada sisi B adalah 188 HB. Maka terjadi penurunan kekerasan pada sisi A sebesar 5 HB, dan terjadi peningkatan kekerasan pada sisi B sebesar 18 HB. Setelah di uji Jominy nilai kekerasan pada sisi A adalah 227 HB, dan pada sisi B adalah 223 HB. Pada pengujian jominy terjadi peningkatan kekerasan pada ujung sisi A sebesar 45 HB, dan peningkatan kekerasan pada sisi B sebesar 35 HB. Hasil penelitian ini dapat direkomendasikan bahwa AISI 304 sebelum digunakan sebaiknya dilakukan pengerasan permukaan sehingga sifat mekanik bahan menjadi lebih optimal.Keywords : Uji Jominy, AISI 304 , Normalizing, ASTM A255-02 
Desain dan Fabrikasi Roda Penggerak untuk Mesin Panen Padi Mini Dua Lajur Herdi Susanto; Zakir Husin; Syurkarni Ali
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 7, No 2 (2021): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (853.27 KB) | DOI: 10.35308/jmkn.v7i2.4333

Abstract

Mesin panen padi dua lajur yang telah di rancang bangun pada penelitian sebelumnya belum memiliki roda penggerak, maka pada penelitian ini pada mesin panen padi tersebut dilakukan modifikasi dengan menambahkan roda penggerak dan dilakukan uji kemampuan gerak pada roda tersebut. Roda penggerak didesain dengan menggunakan perangkat lunak dengan merujuk kepada literatur, fabrikasi dilakukan mengikuti gambar desain dan pengujian dilakukan pada lintasan media tanah rata kering, pengujian dengan beban 40 kg, 80 kg, 120 kg pada putaran mesin 3500 rpm, 5250 rpm dan 7000 rpm dengan jarak lintasan sejauh 50 meter. Hasil penelitian adalah telah didesain dan difabrikasi satu unit roda penggerak mesin panen padi dengan spesifikasi diameter roda penggerak 21 cm, jumlah mata sirip 12, panjang mata sirip 14 cm, lebar mata sirip 3,5 cm dan sudut kemiringan sirip 600 . Hasil pengujian menunjukkan bahwa roda penggerak mesin panen padi telah berfungsi dengan baik untuk lahan kering dengan beban maksimum 80 kg.
Pengujian Papan Komposit Diperkuat Serat Tandan Kosong Kelapa Sawit ( TKKS ) Dengan Menggunakan Alat Uji Impact Charpy Safrijal Safrijal; Syurkarni Ali; herdi susanto
Jurnal Mekanova: Mekanikal, Inovasi dan Teknologi Vol 3, No 1 (2017): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (758.428 KB) | DOI: 10.35308/jmkn.v3i1.864

Abstract

The potential waste of empty fruit bunches palm oil (TKKS) that pure of utilization, so unusefull things. The composite combine Two phase that is the phase matrix and the reinforced phase. Polyester resin is one of the matrix and empty fruit bunches of oil palm as an reinforced. This case is Composite Board Test with a specimen size of 55 x 10 x 10 mm using impact test to be able to know the hardness result of resin mixture and empty fruit bunch palm oil, Composite fiber board is formed with brittle and rigid condition. In the composite test process using the impact test apparatus, the steps of the test there are lifting the pendulum up to 140 degrees by turning counterclockwise, positioning the specimen at the pedestal completely in the middle position, where the knife in the specimen pendulum parallel to the locked pendulum should be pressed on the brake pedal, Pull the pendulum lock or release to swing and break the specimen, Brake pedal is released to stop pendulum, View and record the test data result that indicated by the needle pointer on the arc, the final results shown average impact value is 0.467 J / mm2. In the Horizontal direction the results Average 0.491 J / mm2, highest Vertical direction value 0.480 J / mm2, and Horizontal direction 0,506 J / mm2Keywords : oil palm empty fruit bunch waste, economical products, compressive strenght of the material 
Kemampukerasan Baja Tahan Karat AISI 304 Herdi Susanto; Pribadyo Pribadyo; Rahmad Novizar
Jurnal Mekanova: Mekanikal, Inovasi dan Teknologi Vol 5, No 2 (2019): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (950.529 KB) | DOI: 10.35308/jmkn.v5i2.1636

Abstract

Baja tahan karat AISI 304 secara umum digunakan pada mesin-mesin konstruksi terapan sederhana seperti poros propeler kapal nelayan, mesin penghancur es, pemeras tebu danlainnya, dikarenakan ketahanan korosifnya yang baik, disisi lain kelemahan AISI 304 pada kondisi lapangan sering mengalami deformasi dan kepatahan dengan putaran yangrelatif  tinggi. Untuk mengatasi hal tersebut dapat dilakukan  usaha  menambah  nilai kekerasan permukaan dengan melakukan pengujian Jominy Hardenability. Pengujian Jominy yang dilakukan pada spesimen uji dengan standar ASTM A255-02, dengan laju air pada nozzle 45 liter/menit, pada temperature 8500C dan holding time 15-20 menit. Hasil pengujian menunjukkan bahwa nilai awal kekerasan permukaan pada ujung quenching  sisi A adalah 187  HB dan pada  sisi B adalah  170 HB. Nilai kekerasan permukaan setelah di normalizing pada ujung quenching sisi A adalah 182 HB dan pada sisi B adalah 188 HB. Maka terjadi penurunan kekerasan pada sisi A sebesar 5 HB, dan terjadi peningkatan kekerasan pada sisi B sebesar 18 HB. Setelah di uji Jominy nilai kekerasan pada sisi A adalah 227 HB, dan pada sisi B adalah 223 HB. Pada pengujian jominy terjadi peningkatan kekerasan pada ujung sisi A sebesar 45 HB, dan peningkatan kekerasan  pada  sisi B sebesar 35  HB. Hasil penelitian  ini dapat direkomendasikan bahwa AISI 304 sebelum digunakan sebaiknya dilakukan pengerasan permukaan sehingga sifat mekanik bahan menjadi lebih optimal.
Rancangan Alat Potong Tahu Tradisional untuk Indutri Rumahan di Kabupaten Nagan Raya Herdi Susanto; Jepri Yanto; Wahyudin Wahyudin
Jurnal Mekanova: Mekanikal, Inovasi dan Teknologi Vol 6, No 1 (2020): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (595.378 KB) | DOI: 10.35308/jmkn.v6i1.2211

Abstract

Tofu processing by small businesses and small-medium industries in the Nagan Raya district of Aceh province still uses traditional methods, resulting in minimal daily production results, one of the obstacles in the field was found that the lack of tofu production results caused by working tools for cutting tofu still using knives one-eyed (kitchen knife), from the above, in this study, a number of model tools to cut tofu were adapted to suit the needs of the home industry, the stages of research in the study of literature, observation of tofu processing in the home industry, design of three models of tool design and analysis perunit costs and time efficiency assumptions about the performance of the tofu cutting device. Design using software produces three models of tofu cutting tools namely, models I and II with main frame stainless P = 100 cm, L = 100 and T = 5 cm, and model III stainless main frame P = 100 cm, L = 8 cm and T = 5 cm ,. Assumption of tool performance from the three design models with consideration of production costs and cutting speed, then from the results of literature studies and observations of the tofu making process traditionally selected model III which is more in line with the conditions of home industry workers in Nagan Raya district, with the specifications of the Long stainless main frame 100 cm Width 1 cm and Height 5 cm, tofu production capacity with two pieces of 256 pieces and a cutting speed of 150 seconds. Keywords— tofu cutting tools, home industry, analysis perunit costs, cutting speed
Tingkat Laju Korosi Atmosferik Baja Konstruksi di Lingkungan Pabrik Kelapa Sawit Herdi Susanto; Joli Supardi; Sulaiman Ali
Jurnal Mekanova: Mekanikal, Inovasi dan Teknologi Vol 6, No 2 (2020): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (860.416 KB) | DOI: 10.35308/jmkn.v6i2.2756

Abstract

 Environmental pollution that can cause atmospheric corrosion is the exhaust gas (exhaust fumes) generated from operating the palm oil industry. This atmospheric corrosion will reduce the volume and material mass of a machine component, so that if it reaches certain conditions the strength of the material will result in failure of industrial machine components. The corrosion rate of the construction steel can be measured using the weight loss method according to the ASTM G-50 standard and the ASTM G-1 standard. The research was conducted for one year and data collection was taken every month, the research location was at PT Agro Sinergi Nusantara Batee Puteh. The results of the study, the highest corrosion rate occurred in strip steel reaching 0.57 mpy in October and the lowest corrosion rate occurred for angled steel in September and cylindrical steel in May with a corrosion rate of 0.06 mpy. Keywords— atmospheric corrosion, palm oil industry, ASTM G-50, ASTM G-1, corrosion rate