Article Per Year (5 Year)
p-Index From 2020 - 2025
0.444
P-Index
This Author published in this journals
All Journal Propeller
Rohi, Jemssy R
Unknown Affiliation
Automotive Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Analisa Kuat Tekan Balok Komposit Serat Buah Lontar Hanmina, Marsianus M F; Pell, Yeremias M; Bunganaen, Wenseslaus; Manesi, Damianus; Rohi, Jemssy R
Propeller Jurnal Permesinan Vol. 1 No. 2 (2023)
Publisher : Universitas Pertahanan RI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33172/pjp.v1i2.14587

Abstract

Penelitian ini bertujuan untuk menghasilkan material baru pengganti kayu. Seiring perkembangan teknologi di bidang teknik, kita juga dapat memanfaatkan serat lontar sebagai bahan dasar pembuatan komposit khususnya pembuatan balok komposit. Karakterristik salah satu spesies tanaman lokal ini dapat diperoleh dari pemanfaatan tanaman lontar yang memiliki kandungan sarat yang tinggi, yang dapat digunakan dalam pembuatan komposit. Proses pembuatan spesimen menggunakan metode press hand lay–up, dengan resin unsaturated polyester (UPRs) jenis Yukalac 157 BQTN. Serat yang digunakan adalah serat buah lontar. Sedangkan perlakuan alkali (NaOH) pada serat adalah 5% selama 2 jam. Fraksi volum (Vf) sebesar 35 %. Variasi yang dilakukan pada penelitian ini yaitu variasi arah serat yaitu serat acak dan serat sejajar. Spesimen uji kuat tekan dibuat dengan menggunakan standar ASTM D 695-02a. Hasil penelitian menunjukan bawah nilai kekutan tekan rata-rata tertinggi pada komosit dengan arah serat acak yaitu 13240 MPa sedangkan nilai kekuatan tekan rata-rata terendah ada pada komposit dengan orientasi serat tegak lurus yaitu 11900 MPa. Nilai tegangan rata-rata tertinggi paka komposit dengan orientasi serat acak yaitu 82,088, sedangkan nilai tegangan rata-rata terendah pada komposit dengan orientasi serat tegak lurus yaitu 73,780. Nilai regangan terendah pada komposit dengan orientasi serat acak yaitu 0,181, sedangkan regangan terendah pada komposit dengan orientasi serat tegak lurus pembebanan yaitu 0,102. Sedangkan nilai modulus elastisitas tertinggi pada komposit dengan orientasi serat tegak lurus yaitu 881,505 dan nilai modulus elastisitas terendah pada komposit dengan orientasi serat acak yaitu 488,211
Pemeriksaan Pengujian Dan Penerapan Keselamatan Dan Kesehatan Kerja Pada Bejana Tekan Pereira Maia Pinto, Gaspar; Lopo, Elkana Bilak; Rohi, Jemssy R; Bistolen, Boy
Propeller Jurnal Permesinan Vol. 2 No. 1 (2024)
Publisher : Universitas Pertahanan RI

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

Abstract

This study aims to analyze the methods of inspection, testing, and application of occupational safety and health (OHS) to pressure vessels in industry. occupational safety and health (K3) on pressure vessels in industry. Inspection and testing are closely related to ensuring the structural integrity and operational safety of pressure vessels. Occupational safety and health is a primary focus to prevent workplace accidents and protect employees. Methods This research involved a survey of current inspection and testing inspection and testing practices, as well as analyzing data from incidents of work-related accidents and illnesses. incidents. In addition, the Air Compressor Tank Pressure Vessel Test Inspection was conducted at the PT X location is a periodic test check. Based on Minister of Manpower Regulation No. 37 Year 2016, the periodic test inspection stage consists of work activities, namely Document Inspection, Visual Inspection and NDT Testing. Documents, Visual Examination and NDT Testing, the results showed that Physical/Visual Inspection of the weld area found no weld defects, NDT (Non Destructive Test) Inspection of the weld. NDT (Non Destructive Test) Ultra sonic Wallthickness Testing on the plate was not found. found a difference in thickness (even thickness), Inspection of operating pressure in the weld area - Nozzle weld, Valve no indication of leaking was found. Research This study concludes that the Safety valve and pressure gauge are checked internally and calibrated periodically. internal inspection and periodic calibration, operating pressure should not exceed the permitted pressure. operating pressure should not exceed the allowable pressure of 6 Bar, daily internal checks and maintenance are carried out periodically. periodically., Manual book and Hystory Manual book and Hystory card must always be maintained, When making repairs or replacing damaged components When repairing or replacing damaged components, it must be in accordance with the manufacturer's recommendations. on the Air Receiver Tank unit and document the maintenance activities (Maintenance record must be done internally). maintenance activities (Maintenance records must be carried out internally periodically according to the manufacture), Comply with and implement all safety and health requirements. and occupational health. is fully responsible for the safe operation of the Air Receiver Tank Pressure Vessel. Tank.
Co-Authors Boy Bistolen Hanmina, Marsianus M F Lopo, Elkana Bilak Manesi, Damianus Pell, Yeremias M Pereira Maia Pinto, Gaspar Wenseslaus Bunganaen