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All Journal Journal of Sciencce Technology and Visual Culture Journal of Industrial and Mechanical Engineering
Fajar Paundra
Teknik Mesin, Institut Teknologi Sumatera
Arts Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Studi Karakteristik Pola Aliran Stratified pada Pipa Horizontal 16 mm Ilham Dwi Arirohman; Fajar Paundra; Putty Yunesti
Journal of Science, Technology, and Visual Culture Vol 1 No 1 (2021): Juli 2021
Publisher : Jurusan Teknologi Produksi dan Industri, Institut Teknologi Sumatera

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The main objective of this research is to find information about the characteristics of air-water stratified flow in a small horizontal pipe. Experimentally, the characteristics of horizontal co-current stratified flow in 16 mm diameter and 10 m long acrylic pipe were investigated by using conductance method and visual method. The study parameter in the form of liquid film thickness measured using a developed parallel wire sensor is supported by visual data taken using a high speed video camera in the fully developed area (180-210D). In order to obtain observations covering all stratified flow subpatterns, a variation of the superficial velocity of water (JL) from 0.01 – 0.1 m/s and the superficial velocity of air (JG) from 4 – 20 m/s were chosen. The observed flow sub-patterns are then mapped in a flow sub-pattern map based on variations in the superficial velocity of air and water, adding the database from previous studies. In addition, it is also known that the average liquid film thickness decreases as JG increases but it increases as JL increases, while the interfacial wave velocity increases with increasing JG and JL.
The Effect of Welding Speed on the Physical and Mechanical Properties of Low Carbon Steel Welded Joints Using TIG Welding Using 2 External Magnetic Fields Fajar Paundra; Andi Prabowo; M Farhan Sidik; Abdul Muhyi; Eko Pujiyulianto; Farid Nanda Syanur; Ariyo Nurachman Satiya Permata
Journal of Industrial and Mechanical Engineering Vol 2 No 1 (2024): Journal of Industrial and Mechanical Engineering
Publisher : Department of Industrial Engineering, Universitas Jenderal Soedirman.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jimien.2024.2.1.11873

Abstract

The use of external magnetic fields is very influential in TIG (Tungsten Inert Gas) welding because it can disrupt the stability of the electric arc formed between the tungsten electrode and the base metal. Magnetic fields can cause the arc to distort or shift, resulting in uneven and low quality welds. TIG (Tungsten Inert Gas) is a welding method that uses a non-melting tungsten electrode to produce a weld. This study aims to determine the effect of external magnetic field on the quality of TIG welding results. This research uses the TIG (Tungsten Inert Gas) welding process on low carbon steel material with speed variations of 4 mm/s, 6 mm/s, 8 mm/s and 10 mm/s and uses 2 Neodymium type external magnetic fields. Tests carried out on the results of welding joints are Vickers hardness test, micro & macro structure test. The highest hardness test value was obtained in the 4 mm/s welding speed variation using 2 external magnetic fields with a hardness value of 187.388 HVN. Microstructure testing shows that the base metal contains ferrite and pearlite structures. In the HAZ (Heat Affected Zone) area there are ferrite, pearlite and martensite structures. Macro structure testing shows several welding defects, including porosity, imperfect penetration, underfill and irregular surface. The use of two external magnetic fields can affect the results of TIG welding itself, such as deepening the penetration of welding so as to produce a good welding joint. Some things you should pay attention to if you don't want welding defects to occur are paying attention to the distance between the electric arc and the material, and the torch must be parallel to the welding line.
PENGARUH VARIASI FRAKSI VOLUME KOMPOSIT AKAR WANGI DENGAN MATRIKS POLIURETAN MENGGUNAKAN METODE COMPERSSION MOLDING TERHADAP KEKUATAN TARIK Fajar Paundra; Aditya Septian Putra; Muhammad Syaukani; Abdul Muhyi; Muhammad Luqman Saiful Fikri
Journal of Industrial and Mechanical Engineering Vol 3 No 1 (2025): Journal of Industrial and Mechanical Engineering
Publisher : Department of Industrial Engineering, Universitas Jenderal Soedirman.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jimien.2025.3.1.15558

Abstract

Fraksi volume pada proses pembuatan komposit sangat berpengaruh terhadap kekuatan mekaniknya. Penelitian ini bertujuan untuk mengetahui pengaruh variasi fraksi volume komposit serat akar wangi dengan matriks poliuretan terhadap kekuatan tarik. Bahan yang digunakan dalam penelitian ini adalah serat akar wangi sebagai penguat dan poliuretan sebagai matriks. Variasi fraksi volume serat dan resin yang digunakan adalah 10:90%, 20:80%, dan 30:70%. Proses pembuatan komposit dilakukan dengan metode compression molding selama 24 jam pada tekanan 5 bar. Pengujian kekuatan tarik mengacu pada standar ASTM D638. Hasil penelitian menunjukkan bahwa kekuatan tarik maksimum tertinggi sebesar 1,298 MPa diperoleh pada fraksi volume 30% serat dan 70% resin. Sedangkan kekuatan tarik terendah sebesar 0,777 MPa terjadi pada fraksi volume 10% serat dan 90% resin.
Co-Authors Abdul Muhyi Aditya Septian Putra Andi Prabowo Arirohman, Ilham Dwi Ariyo Nurachman Satiya Permata Eko Pujiyulianto Farid Nanda Syanur M Farhan Sidik Muhammad Luqman Saiful Fikri Muhammad Syaukani Putty Yunesti