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All Journal International Journal of Electrical and Computer Engineering Indonesian Journal of Science and Technology Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) Asean Journal of Science and Engineering (AJSE) Indonesian Journal of Community and Special Needs Education (IJCSNE) Automotive Experiences Journal of Community Services: Sustainability and Empowerment
Farid Triawan
Sampoerna University
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Journal : Indonesian Journal of Science and Technology

 1 
Investigation of Compressive Behavior of Pre-folded Thin-walled Column Fabricated by 3D Printing Farid Triawan; Elin Rachmawati; Bentang Arief Budiman; Djati Wibowo Djamari; Andy Saputro; Ilman Arpi
Indonesian Journal of Science and Technology Vol 6, No 3 (2021): IJOST: VOLUME 6, ISSUE 3, December 2021
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v6i3.39138

Abstract

This paper reveals the mechanical behavior of thin-walled columns with pre-folded patterns subjected to compressive loading. The column specimens (Polylactic Acid) are fabricated using Fused Deposition Modeling 3D printer and subjected to quasi-static compressive loading to investigate their mechanical behavior (by modifying the specimens' cross-section patterns and folding angles). The column specimens are simulated by finite element analysis to understand how the stress distribution and local deformation affecting the stiffness, strength, and overall deformation. The experiments showed that introducing the pre-folded pattern in a thin-walled column with different cross-sections can dramatically lower its structural stiffness (85%) and compressive strength (69%), but increase its deformability (115%), which is good agreement with numerical simulation. The variation of cross-section patterns and pre-folding angle could effectively modify the compressive mechanical behavior. Moreover, the results demonstrate how the FDM 3D Printing method can be used in fabricating a thin-walled column with irregular shapes and then to modify its deformability. This finding can be useful for designing any complex structures requiring specific stiffness and deformation such as suspension devices, prosthetic devices in biomechanics, and robotic structures.
Deburring Method of Aluminum Mould Produced by Milling Process for Microfluidic Device Fabrication Kushendarsyah Saptaji; Farid Triawan; Tong Keong Sai; Asmelash Gebremariam
Indonesian Journal of Science and Technology Vol 6, No 1 (2021): IJOST: VOLUME 6, ISSUE 1, April 2021
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v6i1.31852

Abstract

The existence of top burrs in micro-scale features produced by milling process can deteriorate the surface quality of a product. Ductile metals, such as aluminum alloys, are prone to suffer from top burrs formation after a slot-milling process. A brief review on the state-of-the-art of burr removal process in micro-scale milling is provided in this paper. Various deburring methods were reportedly able to remove the burrs in micro-scale features, however a much simpler method is still needed. In the present work, a deburring process by stainless steel end brushing is introduced for aluminum mould used in microfluidic device fabrication. The micro-scale features are produced by slot-milling process followed by the deburring process. The deburred moulds are then visually observed using optical microscope and Scanning Electron Microscope (SEM) and the average surface roughness and its features profile are measured using 3D Laser Scanning Confocal Microscope. As a result, the proposed deburring method can successfully remove the top burrs, as indicated by a height reduction of about 21% due to the removal action by the brush. Hence, a burr-free embossing mould with complex shape channel features can be produced by milling and by applying a simple deburring process using stainless steel end brush.
Co-Authors Aditiya Harjon Alvin Widjaya Ammar Ramadhan Andy Saputro Ariana Tulus Purnomo Ariq Naufal Rabbani Arnaz Sholeh Asmelash Gebremariam Bentang Arief Budiman Djati Wibowo Djamari Djati Wibowo Djamari Eko Sulistyo Elin Rachmawati Ery Eryanto Glenn Hanaya Idrus Husin Belfaqih Ignatius Pulung Nurprasetio Ihza Lisiano Al Qushai Ilman Arpi Iwan Setiawan Ken Risa Ayu Ndaru Ningrum Kushendarsyah Saptaji Laela Nur Fitria Laely Muryanti Muhamad Rausyan Fikri Muhammad Agni Catur Bhakti Muhammad Aziz Noorfi Azizah Rahim Putri Yuni Lestari Rafie Djajasoepena Rakshidatu Lestaluhu Robby Dwianto Widyantara Tika Endah Lestari Tong Keong Sai Unang Solihin Wahyu Nur Budiarta Wandy Wandy Wandy Wandy