Microlattice is well known as an efficient structure having a low density which maintains mechanical properties, so microlattice is being applied to the structural design of lightweight material in many industrial fields. In this study, we proposed a core-shell microlattice structure by the conformal coating of a metal nanoparticle-polymer composite in order to enhance the mechanical properties of polymeric microlattice printed by light-based 3D printing method. Polymeric architected microlattice was fabricated using digital light printing, which enabled the printing of complex structures with good surface smoothness. Then, the polymeric microlattice was conformally coated with aluminum nanoparticle-polymer composites. To investigate the effect of the metal nanoparticle-polymer composite coating on the mechanical properties of the microlattice, we studied the compressive behavior of cubic and octet-truss microlattices. As a result, we confirmed that both compressive strength and toughness of the two types of microlattices were effectively increased by coating with aluminum nanoparticle-polymer composites.
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Robust catalyst 3D microarchitectures by digital light printing with ceramic particle–polymer composites Do Hyeog Kim, Sang-Hoon Nam, Gina Han, Seo Rim Park, Gwang Ho Jeong, Seok Kim, Young Tae Cho, Nicholas Xuanlai Fang APL Materials.2024;[Epub] CrossRef
Study on Mechanical Properties of MWCNT Reinforced Photocurable Urethane Acrylate for Additive Manufacturing Hyunjun Jo, Bum-Joo Lee Journal of the Korean Society for Precision Engineering.2024; 41(3): 199. CrossRef
Along with the recent spread of 3D printing technology, researchers have developed various materials and equipment, now widely disseminated among individuals and industries. However, most of the current metal 3D printers generate the cutting paths using cutting software only, which doesn’t consider heat input of the plasma or laser. In the wire arc additive manufacturing (WAAM) system, a projection algorithm is created through the CATIA application programming interface. Different from the existing cutting algorithm, this algorithm converts a two-dimensional (2D) image into a three-dimensional (3D) structure by orthogonal projection and a voxel algorithm that expresses a 3D finite volume element. To fix the (x, y) coordinates and the z (Height) coordinate to be on the 2D plane, the projection algorithm models the 3D geometry orthogonal to the 2D plane. The bead modeling data and the step-over values generating the laminate shape were determined. The core of the voxel algorithm that models the free-shape lamination obtains the point location of the wire arc, considering the bead size and the distance between the layer spacing and the voxel center point (According to the processing conditions). Finally, the correct projection and voxel algorithms are selected using a lamination path-acquisition strategy.
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Analysis of Endmill Cutting Characteristics Based on the Machining Path during Postprocessing of Wall-shaped Structures
Fabricated by Wire Arc Additive Manufacturing Hwi Jun Son, Seok Kim, Young Tae Cho Journal of the Korean Society of Manufacturing Process Engineers.2024; 23(3): 44. CrossRef
Parameter Optimization of WAAM with Pulsed GMAW for Manufacturing Propeller-Shaped Blade Sang-Woo Han, Hojin Yoo, Seungcheol Shin, Hansol Kim, Geonho Lee, Jongho Jeon, Sangjun Han, Jungho Cho International Journal of Precision Engineering and Manufacturing.2023; 24(7): 1103. CrossRef
A Study on the Implementation of Virtual Motion Control in Wire Arc Additive Manufacturing Process Using Robot Simulator Chang Jong Kim, Seok Kim, Young Tae Cho Journal of the Korean Society for Precision Engineering.2022; 39(1): 79. CrossRef
Inconel 718, a typical ultraheat-resistant alloy, is recognized as a useful component in aircraft parts owing to its high-temperature strength and good chemical stability. Although many studies have been conducted to determine the proper drill shape to overcome the poor machinability when drilling into Inconel 718, most have involved a cutting process program known as AdvantEdge, as an experimental approach requires much time and money. In this study, our purpose is to optimize the drill shape for efficient drilling by conducting a trust force and temperature analysis using AdvantEdge. In order to achieve this purpose, the reliability of the results of the analysis was verified and by applying design of experiment an analysis of the geometric parameters of the drill shape considering the thrust force and temperature was conducted.
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Analysis of Cutting Force and Plastic Deformation Occurring During Machining of Ti-6Al-4V Alloy Aircraft Parts Hwi Jun Son, Seok Kim, Ki-Beom Park, Hyoun Chul Jung, Young Tae Cho Journal of the Korean Society of Manufacturing Process Engineers.2022; 21(8): 25. CrossRef
Cutting Characteristics and Deformation Analysis for Chord and Side Fitting Parts in an Aircraft Bulkhead Do Hyeog Kim, Yoon Gyo Jung, Yong-Seon Mo, Young Tae Cho Journal of the Korean Society of Manufacturing Technology Engineers.2020; 29(1): 74. CrossRef
Study on Deformation Analysis of Holes during Drilling of Aircraft Engine Compressor Cases Ki-Beom Park, Young-Tae Cho, Yoon-Gyo Jung Journal of the Korean Society of Manufacturing Process Engineers.2018; 17(3): 65. CrossRef
A Study on the Productivity Improvement of Inconel 718 Material Using Cutting Force Control Program Seung-Heon Lee, Hwang-Jin Son, Young-Tae Cho, Yoon-Gyo Jung Journal of the Korean Society of Manufacturing Process Engineers.2017; 16(6): 41. CrossRef
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