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All Journal JTRM (Jurnal Teknologi dan Rekayasa Manufaktur) International Journal of Mechanical Engineering Technologies and Applications (MECHTA)
Nafisah Arina Hidayati
Brawijaya University
Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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Pengaruh Ukuran Serbuk Genteng Tanah Liat terhadap Penyerapan C02 pada Purifikasi Biogas Slamet Wahyudi; Janitra Naufal Faza; Nafisah Arina Hidayati
Jurnal Teknologi dan Rekayasa Manufaktur Vol 4 No 1 (2022): Vol 4 No 1 (2022): Volume: 4 | Nomor: 1 | April 2022
Publisher : Pusat Pengembangan, Penelitian dan Pengabdian kepada Masyarat (P4M) Politeknik Manufaktur Bandung (Polman Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.48182/jtrm.v4i1.87

Abstract

Biogas is an alternative energy that has great economic value for rural communities. In practice, the CH4 biogas content is the most important part of the energy conversion process, but the impurities in the form of carbon dioxide which reduce the heating value is still large. So that efforts are needed to reduce CO2 by purification.The purpose of this study is to obtain a way of purification that improves the quality of biogas with high heating value and low CO2 impurities. The use of tile-type powder adsorbents, namely fine and coarse, which were studied at intervals of 5 and 20 minutes, for data retrieval of heat value and CO2 content. Gas Chromatography - Mass Spectrometry (GCMS) is used to test the adsorption gas content. The results showed a finer type of tile powder size gave better purification results with results at minute 5 and 20 respectively of 24.1 and 20.1% while on the type of grain size coarse at minute 5 and 20 each produced CO2 levels of 23.1 and 20.8%. Due to a decrease in CO2 levels the biogas calorific value after the highest purification is 23893 kJ/ m3 after the purification process which has resulted in a decrease in CO2 levels known during the purification process takes place the largest absorption effectiveness is 59.8% in the type of fine size within 20 minutes. The finer the size of tile powder, the heating value increases
STRESS DISTRIBUTION ANALYSIS ON LIGAMENT AUGMENTATION AND RECONSTRUCTION SYSTEM (LARS) USING FINITE ELEMENT METHOD (FEM) Fauzan Aulia; Achmad As’ad Sonief; Nafisah Arina Hidayati
International Journal of Mechanical Engineering Technologies and Applications Vol. 4 No. 1 (2023)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2023.004.01.7

Abstract

The Ligament Augmentation and Reconstruction System (LARS) is a prosthetic device used to support knee ligaments severed due to injury. The role of LARS in supporting the knee ligaments is to take over the position of the natural ligaments that have been severed, binding the thigh bone and shin bone. LARS is made from polyethylene terephthalate (PET) material, commonly used in industry. LARS is a prosthetic product widely used to heal ligament injuries. However, despite its everyday use, no one has confirmed whether LARS can support a severed ligament. There has never been a study analyzing this tool, even from the company that makes LARS. They only state that LARS is safe and suitable for healing ligament injuries. Therefore, a LARS analysis is needed to convince the public that the tool is safe. This study analyzed the stress distribution in LARS during the standing-to-squatting condition. The results show an uneven stress distribution between the LARS inside the femur and other parts of the LARS. However, the stress distribution is still in a safe condition that does not directly reduce the strength of the LARS.
FINITE ELEMENT ANALYSIS ON DUAL SMALL PLATE AND SINGLE FIXATION PLATE FOR DISTAL COLLARBONE FRACTURE TREATMENT Ilham Prabaswara; Achmad As’ad Sonief; Nafisah Arina Hidayati; Khairul Anam
International Journal of Mechanical Engineering Technologies and Applications Vol. 4 No. 1 (2023)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2023.004.01.9

Abstract

Distal fractures on the collarbone are one of the most common fractures. Using internal fixation is one of the most widely used methods for treating fractures in the collarbone. A dual fixation plate for a collarbone fracture is reported to reduce reoperation due to fixation devices. In this study, the element analysis results will be presented using finite element analysis software (FEA software) for the fixation of collarbone fractures using dual plate fixation, superior plate, and anteroinferior plate. A three-dimensional model of a collarbone fracture with a fracture distance of 3 mm is used to obtain the equivalent von Mises stress value. There was no significant difference in the bending and compressive loadings on the double small plate fixation, superior plate fixation, and anteroinferior plate fixation. The von Mises stress equivalent for double small plate fixation has the most significant value compared to superior and anteroinferior plate fixation. This demonstrates that dual small plate fixation has better biomechanical properties than single plate fixation because it has better stress shielding ability and will accelerate bone healing due to the low load on the collarbone if used by an active patient.
COMPUTER SIMULATION INVESTIGATION OF CRASH BOX DESIGN AS SAFETY-PROTECTION TECHNOLOGY FOR INDONESIA HIGH SPEED TRAIN Dzikri Amali Musyaffa; Moch. Agus Choiron; Yudy Surya Irawan; Nafisah Arina Hidayati; Taryono Taryono
International Journal of Mechanical Engineering Technologies and Applications Vol. 4 No. 1 (2023)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2023.004.01.11

Abstract

The crashworthiness of a railway vehicle has been developed to provide energy absorption capacity and efficiency of energy absorption. This study presents a computer simulation to determine the energy-absorbing structure of the new addition of a crash box design on the Indonesian high-speed train in a collision scenario. The crashworthiness analysis in the crash box is done with software based on finite element methods. The crash box is modeled as a thin-walled structure located in coupler housing, between the draft gear and the car frame. The test model was carried out according to the 2019 SNI 8826 standard using a frontal impact test with an impactor mass of 38.807 kg and a speed of 10 m/s. The pattern of deformation and energy absorption is obtained by calculating the area under the graphical curve of the relationship between the force reaction and the displacement obtained from the simulation. The deceleration of the train is obtained from the graph of acceleration against time on the impactor. The simulation results show that the addition of a crash box design as an energy absorption module on a safety protection technology for railway vehicles can reduce the severity of the impact and improve passenger safety. The application of the initial crash box model also shows an unacceptable train deceleration in the SNI 8826 test standard.
Co-Authors Achmad As’ad Sonief Dzikri Amali Musyaffa Fauzan Aulia Ilham Prabaswara Janitra Naufal Faza Khairul Anam Moch. Agus Choiron Slamet Wahyudi Taryono Taryono Yudy Surya Irawan