Article Per Year (5 Year)
p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Specta Journal of Technology International Journal of Marine Engineering Innovation and Research
Faisal Mahmuddin
Hasanuddin University
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Effect of Post Weld Heat Treatment on Tensile Strength of ASTM A36 Welded Joints: Application on Hull Vessel Material M. Uswah Pawara; Alamsyah Alamsyah; Muhammad Syarif; Faisal Mahmuddin; Harifuddin Harifuddin
International Journal of Marine Engineering Innovation and Research Vol 8, No 1 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i1.16312

Abstract

In fact, in the welding process, there are many problems that arise. Such as cracking caused by excessive stress Residual stress can result in a decrease in the mechanical properties of a material such as brittle fracture, fatigue, and cracking. The purpose of this study was to determine the comparison of tensile strength in ASTM plate welded joints A36 with variations of single vee butt and single bevel butt and knowing the comparison of the effects ofpost-weldd heat treatment on welded joints with variations of single v butt and single bevel butt joints. The method used in this research is experimental. The results of the data obtained in this study The value of the tensile strength of the Single Bevel Butt joint without the influence of Heat Treatment is 153.87 MPa, the tensile strength of the Single Vee Butt joint without the influence of Heat Treatment is 161.75 MPa and the tensile strength of the seam Single Bevel Butt with the effect of Heat Treatment is 196,65 MPa. The tensile strength of the Single Vee Butt seam with the effect of Heat Treatment is 173,36 MPa.
Analysis of Loading Change Effect to Boat Velocity on a 2.5GT Fishing FRP Boat with a Field Test Syerly Klara; Faisal Mahmuddin; Muhammad Muas
SPECTA Journal of Technology Vol. 2 No. 1 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (888.475 KB) | DOI: 10.35718/specta.v2i1.89

Abstract

In order to determine the effect of load change to ship velocity on a 2.5 GT fishing boat, a field test is conducted in the present study. The boat model used in the field test is an actual size boat made from fiber reinforced plastic (FRP) material. The boat is powered by 2 (two) 15 HP direct drive engines each equipped with 3-bladed single screw propeller. Two loading cases are investigated and analyzed which are no load case and with load case. For each case, 4 (four) engine power variations are performed which are 25%, 50%, 75% and 100%. The main parameters measured are boat draught, engine power percentage, shaft revolution speed and boat velocity. From the field test, it is found that even though the propulsion performance increases larger loading and displacement, the increased boat resistance due to larger wetted surface make the boat velocity reduces.
Effect of Methanol–NaOH Catalyst Variations on the Properties and Engine Performance of B50 Biodiesel from Waste Cooking Oil Suardi Suardi; Hariyono Hariyono; Faisal Mahmuddin; M. Rusydi Alwi; Muhammad Uswah Pawara; Alamsyah Alamsyah; Wira Setiawan
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 1 (2026): February 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i1.79-89

Abstract

The growing demand for environmentally friendly fuels has encouraged the use of biodiesel as an alternative to fossil diesel. This study explores the production of B50 biodiesel derived from waste cooking oil using the transesterification method, with two catalyst variations: (1) 1000 mL methanol + 25 g NaOH and (2) 1200 mL methanol + 30 g NaOH per 5 liters of feedstock. The research aimed to evaluate the effects of catalyst concentration on the physical properties of biodiesel (density, viscosity, and calorific value), as well as its impact on engine performance metrics, including torque, specific fuel consumption (SFC), thermal efficiency, and exhaust gas opacity. Experimental testing was conducted using a four-stroke diesel engine at varying loads and speeds. Results showed that both fuel blends met the Indonesian standards for density, while only the 1200 mL + 30 g NaOH blend met the standard for viscosity. The biodiesel prepared using 1000 mL methanol and 25 g NaOH demonstrated superior engine performance, with a maximum torque of 8.92 Nm, minimum SFC (406.90 g/kWh), and highest thermal efficiency (21.28%) at 1000 RPM and 4000 W load. Additionally, the biodiesel prepared using 1200 mL methanol and 30 g NaOH produced lower exhaust opacity. In conclusion, while increased catalyst dosage improves fuel cleanliness and compliance with standards, the lower catalyst yields the best balance of performance metrics, making it a promising for biodiesel application in diesel engines.
Co-Authors Alamsyah Harifuddin Harifuddin Hariyono Hariyono M. Rusydi Alwi M. Uswah Pawara Muhammad Muas Muhammad Syarif Suardi Suardi Syerly Klara Wira Setiawan