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All Journal Rekayasa Mesin ROTOR: JURNAL ILMIAH TEKNIK MESIN Journal of Mechanical Engineering Science and Technology Jurnal Surya Masyarakat DIKEMAS (Jurnal Pengabdian Kepada Masyarakat) Jurnal Surya Masyarakat International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Mechanical Engineering for Society and Industry Jurnal Pengabdian pada Masyarakat Ilmu Pengetahuan dan Teknologi Terintegrasi Dulang: Jurnal Pengabdian Kepada Masyarakat
Redi Bintarto, Redi
Staf Pengajar Program Studi Teknik Mekatronika Politeknik Kota Malang
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The Effect of Boiling Time of Wulung Bamboo Fiber (Gigantochloa Atroviolacea) in NaOH Solution on Tensile Strength of Epoxy Matriced Composites Bintarto, Redi; Widodo, Teguh Dwi; Raharjo, Rudianto; Sulistyo, Erwin; Tamtomo, Bagas
International Journal of Mechanical Engineering Technologies and Applications Vol. 3 No. 1 (2022)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2022.003.01.3

Abstract

The purpose of this study was to determine the effect of immersion time of NaOH at a temperature of 60-70 ℃ in wulung bamboo fibers on the tensile strength of the epoxy matrix composites. Wulung bamboo fibers (Gigantichloa Atroviolacea) have the potential to be used as reinforced in composites because they have high strength and are widely grown in Indonesia. In this study, bamboo wulung fiber reinforcement was used without treatment and with variations, soaking time 30 minutes, 60 minutes, and 90 minutes in 6% NaOH solution with a temperature of 60-70 ℃. The composite manufacturing method used was vacuum assisted resin infusion and the standard composite specimen used as a tensile test was ASTM D638-01. The results showed that the longer the immersion time resulted in a rougher topography of the fiber surface which caused the composite tensile strength to increase due to the better mechanical interlocking between the fibers and the epoxy resin matrix. The wettability results on the fibers also show that the wetness between the fibers and the epoxy resin matrix is getting better, which is shown from the droplet contact angle on the resulting fibers. The highest composite tensile strength was obtained at 90 minutes immersion time of 169.765 MPa followed by immersion time of 60 minutes of 123.2 MPa, immersion time of 5 minutes of 81.7 MPa and without treatment of 71.6 MPa. Based on the results of the macro photo shows that the treatment given will reduce the failure of the pull out and debonding defects on the composite fracture.
Software Simulation and Experiment for Production of a Pillow Block Using Sand Casting Process Raharjo, Rudianto; Widodo, Teguh Dwi; Bintarto, Redi; Azhar, Andika; Wibisono, Aryasatya Rafli; D, Dhimas Kaukabi
International Journal of Mechanical Engineering Technologies and Applications Vol. 3 No. 2 (2022)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2022.003.02.5

Abstract

Of many manufacturing processes, sand casting is one of the most widely used since there is no size limit of the workpiece. Big size product can be carried out at an affordable cost. In its process, sand casting comprises interconnected and complex series. If some of the processes are not properly carried out e.g. during solidification, will result in defects in the casting products. Simulation is an important method currently since it can model the entire metal casting process and show the dynamic character of the casting scheme. In this study, CAD is used for a 3D design on casting simulation. In this study, the grain size of molded sand, material quality and other process parameters were considered identical to all design schemes. This study aims to investigate the effect of varied design and dimensions of the gating system. It was found in this study that porosity and improper solidification were related to the improper gating and riser design.
Co-Authors Abdullah, Harnan Malik Abidin, Muhammad Zaimi Bin Zainal Agus Budiarto Andik Atmaja, Andik Anindito Purnowidodo Anjasari, Asri Ari Wahjudi Arif Wahyudiono Azhar, Andika D, Dhimas Kaukabi Darmadi, Djarot Bangun Dewi, Francisca Gayuh Utami Dwi Kristanto Erwin Sulistyo Fikrul Akbar Alamsyah Firas, Alfian Gayuh Utami Dewi, Francisca Habibulfalah, Endi Imam Kusyairi, Imam Kusumaningsih, Haslinda Lilis Yuliati Ma’arif, Moh. Syamsul Maftuch Maftuch Mega Nur Sasongko Moch. Syamsul Ma'arif Nugroho, Arief Budi Nurkholis Hamidi Pratama, Gesha Denny Putri, Debri Harynia Rudianto Raharjo Runi Asmaranto Saputra, Muhamad Hendra Setiawan, Yustiza Rahadian Siswoyo, Redi Cipto Sugiarto S Suwarso, Wahyu Handoyo Tamtomo, Bagas Teguh Dwi Widodo Wibisono, Aryasatya Rafli