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All Journal Jurnal Energi Dan Manufaktur Journal of Mechanical Engineering Science and Technology Jurnal Aplikasi Dan Inovasi Ipteks SOLIDITAS Jurnal Graha Pengabdian Journal Of Human And Education (JAHE) IRA Jurnal Pengabdian Kepada Masyarakat
Redyarsa Dharma Bintara
Universitas Negeri Malang
Humanities Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Journal : journal of mechanical engineering science and technology

 1 
The Characteristic of Overhang Object to Material Usage on FDM 3D Printing Technology Redyarsa Dharma Bintara; Aminnudin Aminnudin; Dani Prasetiyo; Ferian Rizki Arbianto
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 3, No 1 (2019)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (985.154 KB) | DOI: 10.17977/um016v3i12019p035

Abstract

Fuse Deposition Modeling (FDM) 3D printing is one of additive manufacturing technology which physical 3D model is build up layer by layer. The support structure is almost involved on the process if overhang shape is met on the 3D model. It has main function to prevent the 3D printed model from collapsing. Commonly, the single material source of FDM 3D printer machine is to supply building two structure, structure of main 3D object and support structure. Hence, our goal optimizes the using of support material for reducing the main material usage. Furthermore, the sixteen of variation overhang angle is set to the 3D model. All models are printed into two kind of 3D printed model, printed model with support structure addition and without support addition. The weight of each 3D printed model is measured by weight scale with accuracy of tool is 10-4 g. Then the quality and the weight of 3D printed model are compared and analyzed. The result shows that the average overweight of 3D printed model with support structure addition is 40.41% than without support structure addition. Furthermore, there are several the 3D printed models without support structure that fail printed on variety model with 0° until 11° of overhang angle. The conclusion of this study is that the support structure can prevent the 3D printed model from collapsing but it does not need be built up if the overhang angle more than 11°.
The Effect of Thickness and Type of Material on the Sheared Edge Characteristics of Keychain Cranioplasty Plate Blanking Product Using Eccentric Press Machine Didin Zakariya Lubis; Lea Rachmat Indrasepta; Redyarsa Dharma Bintara; Rizky Ramadhan; Agung Budi Darmawan
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 5, No 1 (2021)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v5i12021p029

Abstract

Keychain cranioplasty plate product has the potential to be produced using the blanking process because it is faster, low-cost, and requires low-energy consumption compared to other mechanical operations. This research aimed to find the effect of material thickness and type on the sheared edge characteristics of keychain cranioplasty plate using the blanking process to meet the international health standard. Experimental research conducted using an eccentric press machine with 40 tons capacity. This research’s test material parameters of titanium (Ti-6AL-4V) and stainless steel (SS-316L) were the 0.5 mm, 0.6 mm, and 0.8 mm thickness with a maximum blanking velocity of 3000 mm/min and 2.5% punch-die clearance. Then, the blanking products were observed using a digital microscope. The results showed that the optimum blanking product quality was found in the titanium (Ti-6AL-4V) and stainless steel (SS-316L) materials with 0.6 mm thickness because it had stable sheared edge characteristics in each zone compared to other variations.
Crashworthiness and Deformation Pattern Analysis of Single and Double Wall with Addition Infill Structure Bintara, Redyarsa Dharma; Choiron, Moch. Agus; Zakariya, Yahya; Shiddieqy, M. Hasbi Ash; Pratama, Fajar Adi
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 8, No 1 (2024)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016vbi12024p168

Abstract

Ship collisions are a phenomenon that often occurs in maritime transportation. One part of the ship that often experiences damage is the ship's wall (hull). This research aims to analyze and compare deformation patterns, stress distribution, and energy absorption in three wall models, single wall, double wall, and double wall, with the addition of infill structures. The infill structure used Polylactic Acid (PLA) polymer material because it provided convenience in the manufacturing process, while the walls of the test model used Aluminum 6063 material. The test model was developed by carrying out the design process using CAD software. Furthermore, a simulation test was carried out using software based on the finite element method with an explicit dynamic analysis type. Each test model received an impact load at a speed of 10 m/s that was carried out by the impactor. The results showed that the largest total energy absorption occurred in the double wall model with a filler structure (3643.49 J). In addition, the outward deformation pattern occurs in the double wall without a filler structure, while the inward occurs in the model with the addition of a filler structure. There were three types of stress distribution for single wall, double wall, and double wall with the addition of infill structure, namely concentrated stress, inline uniform stress, and a combination of both concentrated and inline uniform stress, respectively.
Analysis of Structure and Functional Group of Filament Product-Based PLA/Nanographite Nanocomposite Suryanto, Heru; Aminnudin, Aminnudin; Bintara, Redyarsa Dharma; Putra, Abyan Farras; Nashrullah, Fikri Munif; Binoj, Joseph Selvi; Panicker, Nithin
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 7, No 2 (2023)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v7i22023p129

Abstract

In many polymer compounds, Polylactic Acid (PLA) is a polyalcohol material that has the most potential material which is potent for biological degradation. They have been applied as filaments in additive manufacturing. The PLA properties can be modified by adding nanomaterials such as graphite nanoplatelets. This study aims to obtain the characteristics of PLA-based filament nanocomposite with nanographite reinforcement. Methods include exploration research to obtain nanocomposite filament with PLA and 1% of nanographite. The mixing process of nanographite in PLA solution with chloroform solvent and then the extrusion process of nanocomposite using a single extruder. The product comparison before and after the extrusion process was analyzed using X-ray diffraction and Fourier Transform infrared. Diffractogram results indicate that the original PLA structure is amorphous, and after mixing using nanographite, peaks of nanographite appeared clearly. After the extrusion process, some peaks at 16.7° and 19.1° disappeared, but only a peak 26.6° appeared in the diffractogram. Extrusion makes the structure change. Functional group analysis confirms that some reactions occurred so that many peaks were removed, and several new peaks were observed. It indicates that the extrusion process of PLA/nanographite results in different structures and functional groups that indicate a change in its properties.
Co-Authors Agung Budi Darmawan Aminnudin, Aminnudin Anindito Purnowidodo Arbianto, Ferian Rizki Binoj, Joseph Selvi Dani Irawan Dani Prasetiyo Dendy Ary Nugroho Didin Zakariya Lubis Dwi Bayu Handayani Dzulfikar Johan Akbar Effendi, Muhammad Idris Erwin Komara Mindarta Ferian Rizki Arbianto Gunawan, Fikri I'zas Heru Suryanto Lea Rachmat Indrasepta Mas Aldi Putra Moch. Agus Choiron Moch. Agus Choiron Mochammad Adiel Assidiq Nashrullah, Fikri Munif Panicker, Nithin Pradana, Yanuar Rohmat Aji Pratama, Fajar Adi Puspita Fajar Kharismaningtyas Putra, Abyan Farras Ristha Dewi Budiono Rizky Ramadhan Shiddieqy, M. Hasbi Ash Taupik Yuhana Wulandari, Gita Yoto Yoto Zakariya, Yahya