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All Journal Jurnal MEKANIKAL JURNAL ILMIAH MATEMATIKA DAN TERAPAN
Ramang Magga
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Mathematics Mechanical Engineering

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SIMULASI PENGECORAN BILLET DENGAN MENGGUNAKAN METODE ELEMEN HINGGA (MS MARC) Ramang Magga
JURNAL ILMIAH MATEMATIKA DAN TERAPAN Vol. 6 No. 1 (2009)
Publisher : Program Studi Matematika, Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/2540766X.2009.v6.i1.787

Abstract

This research aim to study the effect of temperature, chilling time, tension, strain, and phase occurred during casting. Finite element simulation method was applied using MS Marc and Fortran software. Condition of casting, when the simulation was run, was divided into three part based on the distance from the center namely 20, 60, and 100 mm. The result showed that simulation at the same temperature, tension of 20 mm has the biggest tension, followed by 60 mm and 100 mm. However, chilling speed at 100 mm from the center was the fastest, and the lowest was 20 mm from the center. At the center of the billet, push tension was occurred. While, pull tension was occurred on the surface
ANALISIS PERANCANGAN TUNGKU PENGECORAN LOGAM (NON-FERO) SEBAGAI SARANA PEMBELAJARAN TEKNIK PENGECORAN Ramang Magga
JURNAL ILMIAH MATEMATIKA DAN TERAPAN Vol. 7 No. 1 (2010)
Publisher : Program Studi Matematika, Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/2540766X.2010.v7.i1.789

Abstract

Casting is a manufacture process that use liquid metal and mold to shape product as similar as its final geometric shape. That casting product is melted in a furnace before it is shaped. This research aims to analyze furnace design. Furthermore, external shape of the furnace is planned 50 cm x 50 cm and shape of the furnace inside is cylinder with diameter 20 cm. The furnace is expected as learning facility of welding for students
PENGARUH SUDUT PUNTIR TERHADAP TEGANGAN DAN REGANGAN Ramang Magga
JURNAL ILMIAH MATEMATIKA DAN TERAPAN Vol. 7 No. 2 (2010)
Publisher : Program Studi Matematika, Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/2540766X.2010.v7.i2.790

Abstract

This research aims to study the effect of torsion angle on the stresses and strains on the material in this case steel and brass. Data collection was performed with the addition of a torsional angle to 1o in materials, material length between 65 mm to 85 mm. Results obtained on different materials with the same length showed that the stress on the steel material is greater than brass (424.415 kgf/mm2 vs. 190.987 kgf/mm2) and the same material (brass) with different length showed that the length of 85 mm smaller voltage longer than 65 mm (190.987 kgf/mm2 vs. 341.89 kgf/mm2).
EFEK VARIASI ARUS DAN WAKTU PENCELUPAN PADA PROSES ELECTROPLATING PLAT BAJA KOMERSIL TERHADAP KETEBALAN LAPISAN DAN LAJU KOROSI Muhammad Syaiful Fadly; Muhammad Iqbal; Ramang Magga
Jurnal MEKANIKAL Vol 10, No 1 (2019): Jurnal Mekanikal Januari 2019
Publisher : Jurnal MEKANIKAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (598.215 KB)

Abstract

Penelitian ini dilakukan di Laboratorium Jurusan Teknik Mesin Universitas Tadulako dengan tujuan untuk mengetahui efek variasi arus dan waktu pencelupan terhadap ketebalan lapisan dan laju korosi pada proses electroplating plat baja komersil dengan menggunakan pelapis nikel. Proses electroplating dilakukan dengan variasi kuat arus sebesar 3,6,9, dan 12 ampere dengan waktu pencelupan 1800 dan 3600 detik. Setelah itu dilakukan proses pengkorosian dengan waktu yang sama untuk semua spesimen yaitu 3600 detik.Hasil pengujian ketebalan lapisan tertinggi diperoleh pada waktu pencelupan 3600 detik dengan arus 12 ampere yaitu sebesar 0,93 mm dan ketebalan lapisan terendah pada waktu pencelupan 1800 detik dengan arus 3 ampere yaitu 0,48 mm. Semakin lama waktu pelapisan dan kuat arus maka semakin kecil nilai laju korosi. Semakin tebal lapisan pelindung nikel di permukaan, maka spesimen memiliki ketahanan korosi yang semakin baik, yaitu pada arus 12 ampere dengan waktu electroplating 3600 detik sebesar 25909,14 mpy terutama bila dibandingkan dengan spesimen yang tidak dilapisi mengalami laju korosi yang paling besar yaitu sebesar 111318,37 mpy.Kata kunci : electroplating, waktu, kuat arus, ketebalan, laju korosi, plat baja komersil, nikel, katoda, mpy
Co-Authors Muhammad Iqbal Muhammad Syaiful Fadly