A planar-dimensions vision measurement method is proposed by developing a Neural Network to measure real-world distance between any two points on the plane. The system leveraging Neural Network ability to search in the solution space is a highly non-linear model that could map points’ location on the pixel plane of image(s) with the actual distance between them considering the non-uniform geometric distortion in captured images caused by the entocentric lens in a common camera. The method was tested with a printed calibration chessboard, placed in different locations on the plane, with measured distance between tested points. Experimental results show the proposed method’s mean absolute error is 1.24 × 10-2 mm and standard deviation is 1.63 × 10-3 mm, tested with 10-folds cross-validation method.
From 2010, the first version of Microsoft Kinect, a low-cost RGB-D camera, was released which used structured light technology to capture depth information. This device has been widely applied in many segments of the industry. In July 2014, the second version of Microsoft Kinect was launched with improved hardware. Obtaining point clouds of an observed scene with high frequency being possible leads to imaging its application to meeting the demand of 3D data acquisition. However, evaluating device capacity for mechanical part modeling has been a challenge needed to be solved. This paper intends to enhance acquired depth maps of the Microsoft Kinect v2 device for mechanical part modeling and receive an assessment about the accuracy of 3D reconstruction. Influence of materials for mechanical part modeling is also evaluated. Additionally, experimental methodology for 3D modeling of the mechanical part is finally reported to ascertain the proposed model in this paper.
Citations
Citations to this article as recorded by
Interactive Contents System Using Kinect Camera Eunchong Ha, Sunjin Yu The Journal of Korean Institute of Information Technology.2020; 18(7): 111. CrossRef
Core/shell nanowire (NW) is recognized as promising one-dimensional material for nanoelectronic and nanoelectromechanical systems. However, its mechanical properties so important for engineering applications remain largely unexplored. Based on the density functional theory (DFT), we theoretically investigate mechanical and electronic properties of the Ge-core/Si-shell NWs along the [100] direction within the cross sectional size of 1.0 nm and 1.4 nm under the axial strain. Our results show that ideal strength of Ge-core/Si-shell NWs strongly depends on wire cross sectional size compared with that of the Si and Ge NWs. Ideal strength (maximum tensile strength) of Ge-core/Si-shell NWs increases significantly when increasing thickness of the Si-shell. We found that bond lengths around interfaces between the core and the shell play a predominant role in ideal strength of Ge-core/Si-shell NWs. Additionally, band structures of NWs are modififed by applying axial strain. Band gaps of NWs decrease with increasing strain. Our results provide important insight into intrinsic mechanical behavior and electronic properties of Ge-core/Si-shell NWs, useful for the design of nanodevices with Ge-core/Si-shell NWs in future applications.
This study investigated the effects of process parameters on mechanical properties of fabricated parts of the Polylactic acid (PLA) materials using fused deposition modeling (FDM) in 3D printing Technology. First, Taguchi method in the design of experiment (DOE) approach was applied to generate a design matrix of three process parameters namely; printing speed, extrusion temperature and layer thickness. A L9 array with 9 specimens was used for fabrication under various process parameters by the Builder 3D printer. Tensile test was implemented and recorded in accordance with ASTM D368 standard. Achieved data were analyzed using the Minitab software to show the effect of each process parameter on mechanical properties. Secondly, a regression model was developed to predict the trend of response in case of change in setting of parameters and estimating the optimal set of process parameters which creates the strongest FDM parts. The achieved optimum parameters were used to validate the fabricated samples for tensile testing. According to the results, the best mechanical strength of fabricated parts was achieved with printing speed of 48 mm/s, extrusion temperature of 220 degree of celsius (C) and the layer thickness of 0.15 mm. Also, the extrusion temperature was the most influencing factor on ultimate tensile stress.
Citations
Citations to this article as recorded by
Predicting the dynamic tensile response of FDM materials using machine learning Amjad Alsakarneh, Sinan Obaidat, Ahmad A. Mumani, Mohammad F. Tamimi Discover Applied Sciences.2025;[Epub] CrossRef
From feedforward to quantum: Exploring neural networks for predicting tensile strength in additively manufactured polylactic acid parts Mohammad Hossein Nikzad, Mohammad Heidari-Rarani, Reza Rasti, Neda Moghim, Sachin Shetty Materials Today Communications.2025; 49: 113956. CrossRef
Machine learning-driven prediction of tensile strength in 3D-printed PLA parts Mohammad Hossein Nikzad, Mohammad Heidari-Rarani, Reza Rasti, Pooya Sareh Expert Systems with Applications.2025; 264: 125836. CrossRef
Using Bayesian Regularized Artificial Neural Networks to Predict the Tensile Strength of Additively Manufactured Polylactic Acid Parts Valentina Vendittoli, Wilma Polini, Michael S. J. Walter, Stefan Geißelsöder Applied Sciences.2024; 14(8): 3184. CrossRef
Experimental and Investigation of ABS Filament Process Variables on Tensile Strength Using an Artificial Neural Network and Regression Model Mostafa Adel Abdullah Hamed Al-Nahrain Journal for Engineering Sciences.2024; 27(2): 251. CrossRef
OPTIMIZATION OF FDM 3D PRINTING PARAMETERS FOR TENSILE STRENGTH OF PETG CARBON FIBRE USING TAGUCHI METHOD Nor Aiman Sukindar, Nurul Aini Athirah Abdul Rahim , Ahmad Shah Hizam Md Yasir , Shafie Kamaruddin , Mohamad Talhah Al Hafiz Mohd Khata , Nor Farah Huda Abd Halim , Mohamad Nor Hafiz Jamil , Ahmad Azlan Ab Aziz International Journal of Modern Manufacturing Technologies.2024; 16(3): 143. CrossRef
The use of machine learning in process–structure–property modeling for material extrusion additive manufacturing: a state-of-the-art review Ziadia Abdelhamid, Habibi Mohamed, Sousso Kelouwani Journal of the Brazilian Society of Mechanical Sciences and Engineering.2024;[Epub] CrossRef
Machine Learning Study of the Effect of Process Parameters on Tensile Strength of FFF PLA and PLA-CF Abdelhamid Ziadia, Mohamed Habibi, Sousso Kelouwani Eng.2023; 4(4): 2741. CrossRef
Metatarsal bone model production using 3D printing and comparison of material properties with results obtained from CT-based modeling and real bone Zeliha Coşkun, Talip Çelik, Yasin Kişioğlu Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine.2023; 237(4): 481. CrossRef
Ergiyik filament ile imalat yönteminde kullanılan PLA ve çelik katkılı PLA filament malzemelerin mekanik ve fiziksel özelliklerinin incelenmesi Ali Osman ER, Osman Muhsin AYDINLI Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi.2023; 39(2): 1285. CrossRef
INFLUENCE OF FDM PROCESS VARIABLES' ON TENSILE STRENGTH, WEIGHT, AND ACTUAL PRINTING TIME WHEN USING ABS FILAMENT Tahseen Fadhil Abbas, Ali Hind Basil , Kalida Kadhim Mansor International Journal of Modern Manufacturing Technologies.2022; 14(1): 7. CrossRef
Analysis of Correlation between FDM Additive and Finishing Process Conditions in FDM Additive-Finishing Integrated Process for the Improved Surface Quality of FDM Prints Ji Won Yu, Hyung Jin Jeong, Jae Hyung Park, Dong Hun Lee Journal of the Korean Society for Precision Engineering.2022; 39(2): 159. CrossRef
Regression Model for Optimization and Prediction of Tensile Strength of a PLA Prototype Printed Lahcen Hamouti, Omar El Farissi, Omar Outemssa Journal of Advanced Computational Intelligence and Intelligent Informatics.2022; 26(6): 952. CrossRef
Effect of extruder temperature and printing speed on the tensile strength of fused deposition modeling (FDM) 3D printed samples: a meta-analysis study Sajjad Farashi, Fariborz Vafaee International Journal on Interactive Design and Manufacturing (IJIDeM).2022; 16(1): 305. CrossRef
Effects of raster angle in single- and multi-oriented layers for the production of polyetherimide (PEI/ULTEM 1010) parts with fused deposition modelling Musa Yilmaz, Necip Fazil Yilmaz Materials Testing.2022; 64(11): 1651. CrossRef
Influence of 3D printing process parameters on the mechanical properties and mass of PLA parts and predictive models João Araújo Afonso, Jorge Lino Alves, Gabriela Caldas, Barbara Perry Gouveia, Leonardo Santana, Jorge Belinha Rapid Prototyping Journal.2021; 27(3): 487. CrossRef
It was a requirement to use electronic components developed and operated by MANPAD in the military wheel vehicle with greatly improved operational radius and quickness and maneuverability. The objective of this study was to add the structure of the newly developed equipment for future compatibility with each other, and design it according to the requirements of vehicle installation. As the operating environment changes from one type of equipment to another, that is operated by a person, the differences between the environmental specifications and characteristics of the two types of weapons are compared. In addition, dynamic characteristics analysis and testing of equipment units were carried out in order to confirm whether the equipment can be normally operated with the disturbance (vibration / shock) that will be continuously received as the operating environment changes. The physical properties of the PCB components were verified through actual environmental tests after confirming the difference between the values shown between the commercial program and the reference documents.
Citations
Citations to this article as recorded by
Dynamic Characteristic Analysis of an Inertial Navigation System for Guided Weapons Equipped with COTS Vibration Isolator Ho-Ho Lee, Jun-Hyuk Park, Geun-Suk Gil, Jong-Geun Jeon, Ki-Hyuk Kwon, Sang-Chan Moon, Seung-Bok Kwon, Seongho Nam, Chang-Ky Sung Journal of the Korean Society for Precision Engineering.2024; 41(10): 797. CrossRef
Development of Free Fall Drop Tester for Electronic Components In Jun Jung, Jae Young Jang, Dong-Kil Shin Journal of the Korean Society for Precision Engineering.2020; 37(12): 889. CrossRef
Elastomeric O-ring seals are widely used in static and dynamic applications due to their excellent sealing capacity, and availability in various costs and sizes. One of the critical applications of O-ring seals is solid rocket motor joint seal. In this, the operating hot gas must be sealed during the combustion time. In this study, we analyzed the behavior of O-ring compressed and highly pressurized by using the finite element method. The numerical analysis technique was verified through the comparison of analytical model and FE results. By using the verified FE method, the contact stress profiles at the sealing surfaces were investigated. It was found out that the contact stress profiles and deformation behaviors of the Oring are affected by friction coefficient, extrusion gap and stress relaxation considerably.
Citations
Citations to this article as recorded by
Experimental and numerical evaluation of a rubber seal in a vacuum suction pad for an automatic mooring system Yeonhong Son, Taehyun Lee, Jung Yup Kim, Hwasup Jang, Jongjik Lee, Youngki Kim, Songkil Kim, Yongjin Kim Marine Structures.2024; 94: 103573. CrossRef
A Study on Sealing Performance Analysis for Electric Vehicle Coolant Control Hub Modules System Kim Gisu, Jeongsun Lee, Dongchul Kim, Myeongeui Song, Cho Wooyeon Transaction of the Korean Society of Automotive Engineers.2023; 31(3): 227. CrossRef
Structural Analysis and Experimental Study on the Spherical Seal of a Subsea Connector Based on a Non-Standard O-Ring Seal Dong Liu, Feihong Yun, Kefeng Jiao, Liquan Wang, Zheping Yan, Peng Jia, Xiangyu Wang, Weifeng Liu, Xiaoquan Hao, Xiujun Xu Journal of Marine Science and Engineering.2022; 10(3): 404. CrossRef
A guided missile is a weapon system used in the interception of a ballistic missile using kinetic energy of a kill vehicle. The DACS (Divert and Attitude Control System) is a quick reaction propulsion system and subsystem of a kill vehicle that provides control over positions of a kill vehicle. The DACS allows for the interception of its target with greater accuracy and reliability. A Kill vehicle needs to move at high speed in a bid to intercept a ballistic missile after detecting a target. Thus, the weight reduction design of DACs system is required. The DACS operates under high temperature and pressure environment. In this study, one-way FSI (Fluid and Structure Interaction) analysis were conducted for various types of weight reduction valve model to validate its robustness. Through this process, we suggest an optimized weight reduction valve model
If fatigue failure occurs during aircraft operation, it can cause catastrophic injuries. So, it is necessary to study fatigue failure at the design stage. Frequency domain fatigue analysis is used to predict fatigue failure. During frequency domain fatigue analysis, results can be calibrated by PSD analysis. In this study, fatigue failure is predicted by the Dirlik method, Lalanne method and Steinberg method. Regarding results, life determined by the Dirlik method, Lalanne method and Steinberg method were 8.737, 8.314, and 7.901 times the standard life, respectively. The Steinberg method is the most conservative but the difference with other methods was approximately 10%. In the cycle histogram, the Dirlik method had more counts than the Lalanne method in lower stress range. However, it does not affect the life of material used in this study. However, if material has a lower fatigue limit or stronger PSD data is used, life difference will occur.
Citations
Citations to this article as recorded by
Analysis of Acoustic Load Fatigue Life of Skin of POD for Aircraft considering Aspect Ratio Wonwoong Lee, Jaemyung Cho, Jongin Bae, Hoonhyuk Park Journal of the Korea Institute of Military Science and Technology.2025; 28(2): 126. CrossRef
A Study of Vibration Analysis of 100 MPa Class Fitting Thread for Mobile Hydrogen Charging Station JUNYEONG KWON, SEUNGJUN OH, JUNGHWAN YOON, JEONGJU CHOI Transactions of the Korean Hydrogen and New Energy Society.2024; 35(1): 83. CrossRef
Very high cycle fatigue on gas metal arc butt-welded AA6061-T6 plates Iksu Kim, Moon G. Lee, Martin Byung-Guk Jun, Jungho Cho, Yongho Jeon Journal of Mechanical Science and Technology.2023; 37(12): 6649. CrossRef
Vibration-Based Fatigue Analysis of Octet-Truss Lattice Infill Blades for Utilization in Turbine Rotors Sajjad Hussain, Wan Aizon W. Ghopa, S. S. K. Singh, Abdul Hadi Azman, Shahrum Abdullah, Zambri Harun, Hawa Hishamuddin Materials.2022; 15(14): 4888. CrossRef
Experimental Verification of Dirlik Fatigue Evaluation in Frequency Domain Using Beam Structure under Random Vibration Eunho Lee, Siyoung Kwak Transaction of the Korean Society of Automotive Engineers.2021; 29(2): 157. CrossRef
We propose the measurement method for location errors in a horizontal 4-axis machine tool using a touch trigger probe and a sphere artifact. Location errors (type of geometric errors), are values that do not change with the position of each feed axis because these errors are usually fixed in an assembly procedure. There are seven location errors in a horizontal 4-axis machine tool; three squareness errors in three linear axes and two squareness and two offset errors in a rotary axis. The positions of center point of sphere artifact on a rotary axis are measured by a touch trigger probe mounted on a tool axis. Because measured center points are expressed by seven location errors via the homogeneous transformation matrix, location errors can be separated by analyzing measured data. To validate the proposed method, measurement experiments were performed on a horizontal 4-axis machine tool. Measurement results were verified by comparing before and after compensation.
Citations
Citations to this article as recorded by
Sequential Measurement of Position-independent Geometric Errors in the Rotary and Spindle Axes of a Hybrid Parallel Kinematic Machine Seung-Han Yang, Dong-Mok Lee, Hoon-Hee Lee, Kwang-Il Lee International Journal of Precision Engineering and Manufacturing.2020; 21(12): 2391. CrossRef
Three-dimensional CAD models are usually used by designers because of their applications in the areas of CAD/CAM/CAE/CAQ. A desirous trend to create this model, long been studied by scientists globally, is 3D model reconstruction from views. With this method, geometric information can be easily entered as well as using existing 2D drawings. Most of the previous studies used three views, but many of the common parts needed only two views. A flexible reconstruction system that responds to both forms is the subject of this study. The proposed method has been installed and tested by an ADSRX program running on AutoCAD software. The 3D model results have been checked for the compatibility with CAD/CAM systems.
Citations
Citations to this article as recorded by
Developing an Automatic 3D Solid Reconstruction System from only Two 2D Views Long Hoang, Thanh Tuan Nguyen, Hoang Anh Tran, Duc Huy Nguyen Engineering, Technology & Applied Science Research.2024; 14(4): 15981. CrossRef
A 3D solid model reconstruction system from only two views for CAD/CAM/CAE/CNC Long Hoang International Journal of Modern Physics B.2020; 34(22n24): 2040157. CrossRef
Heat transfer characteristics in the vicinity of irradiated region of the beam of a selective laser melting (SLM) process affect the creation of the melted region during the deposition. The creation of the molten pool is greatly influenced by laser parameters and powder characteristics. The goal of the paper is to investigate the influence of laser parameters and powder porosity on thermal characteristics in the vicinity of the molten pool of the SLM process through repeated finite element analyses (FEAs). The power and the scan speed are chosen as the laser parameters. The laser is assumed to be a volumetric Gaussian heat flux model. Materials of the powder and the substrate are chosen as SUS17-4PH and S45C, respectively. Temperature dependent thermal properties for those material are used to perform the FEA. An appropriate efficiency of the heat flux is predicted by comparing the results of FEAs and those of experiments. The influence of laser parameters on temperature distributions in the vicinity of the melted region and the formation of the molten pool is examined. In addition, the effects of porosity of powders on heat transfer characteristics in the vicinity of the melted region are discussed.
Citations
Citations to this article as recorded by
Effects of Deposition Strategy and Preheating Temperature on Thermo-Mechanical Characteristics of Inconel 718 Super-Alloy Deposited on AISI 1045 Substrate Using a DED Process Ho Kim, Kwang-Kyu Lee, Dong-Gyu Ahn, Hyub Lee Materials.2021; 14(7): 1794. CrossRef
The objective of this study was to perform surface hardening experiments of titanium alloy using laser. The surface hardness value after laser hardening treatment was observed to increase with respect to the inflow of laser energy. However, when the laser energy exceeded the critical value, damage and cracks were observed on the surface of the material. The relationship between surface hardness values and process variables such as laser energy, scan speed, and number of laser scans was quantitatively modeled through the design of experiments and analysis of variance. Using the established mathematical model, the surface hardness value of the material can be predicted accurately with an average of 10% error over various process conditions. Analysis of the surface composition of the material using energy dispersive spectrometry showed that titanium oxide was the main cause of the increasing surface hardness. Further studies will be conducted to improve the accuracy and predictability of the model using nonlinear modeling techniques.
First
Prev
