Table of contents

Volume 842

2020

Previous issue Next issue

2020 4th International Conference on Manufacturing Technologies (ICMT) 17-19 January 2020, Seattle, WA, USA

Accepted papers received: 15 April 2020
Published online: 15 June 2020

Preface

011001
The following article is Open access

The 2020 4thInternational Conference on Manufacturing Technologies (ICMT 2020) and 2020 8th International Conference on Nano and Materials Science (ICNMS 2020) were held in Seattle, USA on January 17-20, 2020. The conference program consisted of invited, oral, and poster presentations from scientists working in the areas of materials science and manufacturing technologies. In particular, the conference covered recent trends and advances in the field of Manufacturing Technologies.

The major goal of the conference was to bring academic scientists, engineers and industry researchers together to share and exchange their experience and research results, and to explore opportunities for collaboration. Distinguished Professors and experts delivered the latest state of the art information in their respective fields of expertise as well discussed the challenges and future directions.

The conference focused on important research issues associated with science and technology in the rapidly evolving fields of Manufacturing Technologies, Nano and Materials Science and to promote synergy between basic research and technological needs for real industrial applications. This event was intended not only as a vehicle for the dissemination of research results on the latest advances in the area of Manufacturing Technologies, Nano and Materials Science, but also as an opportunity for scientists from around the world to discuss developments in their respective countries, exchange ideas and explore the possibility for collaboration at international level. The wide ranging presentations at the conference included invited talks, oral and poster presentations, delivered over six sessions.

The conference proceedings consist of 26 selected papers presented at the conference. We hope that the conference proceedings will offer the readers a good insight into the future direction of research in this field of materials science and engineering.

We wish to express our gratitude to members of the conference committee and reviewers who gave their valuable time and advice, which helped in selection of high quality papers from all over the world for the conference and for publication in the proceedings. We also thank all the authors and participants for contributing to the success of the conference and we truly hope to see them again at the future ICNMS & ICMT conferences.

Conference Chair Prof. Ramesh K. Agarwal, Washington University in St. Louis, USA

On behalf of the Conference committee Seattle, WA, USA

Statement of Peer Review

All papers published in this volume of IOP Conference Series: Materials Science and Engineering have been peer reviewed through processes administered by the proceedings Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.

011002
The following article is Open access

Prof. Ramesh K. Agarwal, Washington University in St. Louis, USA Prof. Steven Y. Liang, Georgia Institute of Technology, USA

Program Committee Chairs

Prof. Jing Wang, University of South Florida, USA

Prof. Devki N. Talwar, Indiana University of Pennsylvania, USA

Prof. Xu Chen, University of Washington, USA

Prof. Yong Suk Yang, Pusan National University, Korea

Prof. Farhang Pourboghrat, The Ohio State University, United States

Technical Committees

Prof. Anselmo Alves Bandeira, Federal University of Bahia, Brazil

Prof. Mohd Rafie Bin Johan, University of Malaya, Malaysia

Prof. Fei Zhou, Nanjing University of Aeronautics and Astronautics, China

Assoc. Prof. Wenke Gao, Lanzhou University of Technology, China

Prof. Abhijit Chanda, Jadavpur University, India

Prof. Himadri Chattopadhyay, Jadavpur University, India

Prof. Velamurali, Anna University, India

Prof. A. Elaya Perumal, Anna University, India

Prof. N. V. Raghavendra, National Institute of Engineering, Mysuru, India

Prof. Recai KUS, Selcuk University, Turkey

Assoc. Prof. Prasanna Shakti Jena, Vardhaman College of Engineering, India

Dr. Kamran Shavezipur, Southern Illinois University Edwardsville, USA

Dr. Marco Castellani, University of Birmingham, UK

Dr. Marta Menegoli, Naica SC, Italy

Dr. Aydin Berenjian, The University of Waikato, Ireland

Dr. D. Ramasamy, Universiti Malaysia Pahang, Malaysia

Dr. Mohsen Motahari-Nezhad, Shahid Beheshti University

Dr. Hatem Mrad, Université du Québec en Abitibi-Témiscamingue, Canada

Dr. Chen-Yuan Chung, National Central University, Taiwan

Dr. Aydin Berenjian, The University of Waikato, Ireland

011003
The following article is Open access

List of Names and institution e-mail are availble in this pdf.

011004
The following article is Open access

All papers published in this volume of IOP Conference Series: Materials Science and Engineering have been peer reviewed through processes administered by the proceedings Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.

Composite Materials

012001
The following article is Open access

and

Polymer matrix composites find extensive application in aerospace and automotive industry. Although composites are molded to a near net shape, secondary machining such as hole-drilling and edge trimming is unavoidable. Conventional milling and Abrasive water jet are widely employed processes to cater the machining needs. Because of the nature of material-tool interaction, both the processes have their limitations resulting in machining induced damages such as matrix cracking, exit-delamination, fiber pull-outs, spring-back, interply delamination, striations, abrasive embedment, and kerf taper.

Surface roughness plays a pivotal role in determining the damage induced during the machining processes. Traditionally roughness parameters – average roughness (Ra) and ten-point average (Rz) are used to characterize the surfaces. Often, the use of cut-off wavelengths, governed by standards, result in poor distinguishability for machined surfaces of anisotropic materials such as polymer matrix composites (PMC). The insensitivity and poor distinction in certain cases leads to unsound judgment in characterizing the machining induced damage, and also in the selection of process parameters. This necessitates other methods and indicators that better identify the surface signature and correlate with the process parameters. In this study, a novel approach is proposed in which wavelet packet transform (WPT) is applied to the machined surface profiles. An indicator (ratio of wavelet packet energy and entropy) is defined to characterize the surface and better predict the surface quality as a function of machine tool, material and process variables. Regardless of the type of CFRP and machining process (AWJ and conventional milling), WPT indicator proved to be a better predictor of the machining process (R2 > 80%) when compared with Rz (R2 < 67%).

012002
The following article is Open access

, , , , and

Fibre reinforced polymer composites (FRPs) are being increasingly used in aerospace and automotive applications due to their high specific mechanical properties. The construction industry has also started taking advantage of the potential of FRPs for both structural and non-structural purposes. The result of this remarkable absorption of FRPs within the worldwide production market, has led to an immense increase of decommissioned thermoset-matrix components. Nowadays, the majority of the decommissioned FRP components are recovered energy-wise through incineration or simply discarded in landfills around the globe. Within the framework of this paper, we present a solution for the extension of the service life of decommissioned FRP components. Decommissioned electrical insulation FRP pipes were granulated and incorporated as fillers within both cementitious and polymer matrix composites. The effect of FRP granulates on the mechanical performance of cementitious and polymer matrix composites is examined to determine the maximum granulate-filler fraction that can be recycled without compromising the mechanical performance and manufacturing process.

012003
The following article is Open access

and

The objective of this study is to create electrically conducting composite polymers using the dissolution method. Composites are made from Acrylonitrile Butadiene Styrene (ABS) as the matrix and Carbon Nanotubes (CNTs) as the filler. Composites were made using the dissolution method with N, N-Dimethylformamide (DMF). All the components were mixed then dried in a fume hood until they were formed into pellets in a compression molder. Compressed samples were optically and electrically tested. Results show that composites that were only dried in the fume hood have a bubbled structure and reach percolation around 1-5 phr. The bubbles were determined to be coming from water that got into the samples while they were drying in the fume hood. Composites were placed in a furnace at 100°C for 1 hour to take the water out of them. Results showed that furnace dried samples have a smooth surface and are more resistive than the bubbled composites. The bubbled samples were most likely less resistive than samples with a smooth surface because during the bubble formation the CNTs are being pushed closer together causing percolation to happen sooner.

012004
The following article is Open access

, and

This paper presents the effects of wet/dry cycling loading on the moisture uptake behavior of a Fibre Reinforced Polymer (FRP) composite used in the civil engineering sector. FRP samples of various dimensions were cut from an 'off-the-shelf' pultruded flat sheet and conditioned in a cyclic hygrothermal environment. A series of 3 consecutive moisture absorption-desorption cycles lasting for 153 days were carried out to investigate the moisture uptake behavior of FRPs. The hygrothermal procedure consisted of immersion in 60°C distilled water until saturation and consecutively drying in a 60°C oven until equilibrium was reached. After the 1st desorption cycle, it was found that FRP samples lose a significant amount of mass due to chemical decomposition, the extent of which increases as wet/dry cyclic loading progresses. The effective mass loss leads to a subsequent significant increase in the rate of moisture uptake. Mechanical behavior of the FRPs aged at 40°C, 60°C and 80°C for 224 days is examined at both 'wet' and 'dry' states to reveal the reversible and irreversible effects of moisture uptake. It was revealed that the effects of 40°C hygrothermal aging on mechanical performance are reversible when moisture is removed.

012005
The following article is Open access

and

Rotary wear tests were performed on unidirectional graphite fiber reinforced epoxy to study the effect of fiber orientation and abrasive particle size on the wear resistance and mechanism of the graphite/epoxy polymer composite. The tests were performed at a constant load of 1250 grams for 10000 cycles with abrasive particle sizes of 15 and 55 μm using Taber rotary platform abrasion tester. The surface topology and material removed along the wear track were obtained for a range of fiber orientations. The surface roughness was found to decrease as the fiber orientation increased from 0° to 90°. Negative skewness indicated the presence of numerous valleys on the surface. These variations in the surface roughness parameters were more pronounced for higher particle size of 55 μm. Maximum wear occurred at 135°. Further, the wear mechanism and type of damage were identified through SEM micrographs. Distinct damage could be identified at 0°, 45° and 90°.

012006
The following article is Open access

, , , and

Within the framework of this study, we aim at the replacement of plywood as ship containers floor material, with a lighter and friendlier-to-rainforests composite material. Wood fibre-reinforced thermoPlastic Composites (WPC) were developed using double-screw extrusion, consisting of recycled waste wood fibres reinforcing recycled High Density PolyEthylene (HDPE) matrix. This shift to WPCs has the dual positive effect of containers freight reduction as well as elimination of the use of natural resources, radically contributing to climate change measures. Following international shipping standards for container flooring, high quality recycled WCPs were developed. HDPE was found to provide acceptable structural performance. To that respect, WPC blends of HDPE matrix reinforced with 30%, 40% and 50%wt wood fibre flour, were fabricated and subjected to 3 point-bending mechanical testing. It was found that the studied WPCs reveal mechanical performance adequate to qualify as replacements of plywood timber flooring in ship containers.

012007
The following article is Open access

, , and

High energy ball milling (HEBM) and pressure less sintering technique were performed to achieve a homogenous powder mixture and porous ceramic membranes of a-Al2O3/2%MWCNTs. A uniaxial powder compaction press was used to compress the powder mixture into circular green pellets (27 mm in diameter, 3-4 mm thickness) at three different pressure values of 100 MPa, 250 MPa and 400 MPa, followed by sintering at three different temperature values of 1200 °C, 1250 °C and 1300 °C under argon gas atmosphere. The effect of process parameters on the pore distribution and phase change was characterized by employing Field Emission Scanning Electron Microscopy (FESEM) and X-Ray Diffraction (XRD) respectively. Process parameters were found to have a strong influence on the characteristics of the developed membranes like diametrical strength, water permeability and porosity. Water flow rates varied from 950 l/m2.hr to 42 l/m2hr, porosity decreased from 48.57% to 28.87% and diametrical strength increased from 0.95 MPa to 11.06 MPa as compaction pressure was increased from 100 MPa to 400 MPa and sintering temperature was increased from 1200 °C to 1300 °C.

012008
The following article is Open access

, and

This paper presents the effects of the addition of (i) the organomodified nanomontmorillonite (nMt) dispersion, nC2, produced for the scope of the FP7 project name FIBCEM and of (ii) the powder, undispersed organomodified industrially produced nMt, nC4 on quaternary nMt-fibre reinforced binders. The reference binder consisted of 60% Portland cement (PC), 20% limestone (LS) and 20% fly ash (FA). Superplasticizer was added at 2%, polyvinyl alcohol fibres at 3% and nMt was added at 1%. Flexural strength test were carried out at day 7, 28, 56 and 90 showed marginal enhancement offered by the nMt dispersion, which was attributed to limited, but existing additional pozzolanic reactivity of the particles of nMt. If fact, following methodology presented in published papers on other formulations, thermal gravimetric and X-ray diffraction analysis showed limited consumption of Ca(OH)2 towards production of additional C–S–H, which is in line with the marginal increase of flexural strength for the same age of testing.

Material Characterization

012009
The following article is Open access

, and

Geopolymer concrete is one of the sustainable building materials that has a low energy production and a minimum carbon footprint. In this study, the effect of utilization waste clay brick on the thermal conductivity (TC) of Metakaolin geopolymer concrete (MK-GPC) was investigated. The waste of clay brick was used in two series of mixes, first one included clay brick waste powder (BP) as partial replacement of Metakaolin (MK) at weight dosage 10%, 15%, and 20%, while the second group of mixes contained crushed clay brick waste aggregate (CBA) at replacement level of 10%, 20% and 30% by volume of natural coarse aggregate. In addition to (TC), all the specimens were tested to determine the ultrasonic pulse velocity (UPV), and voids content at 7 and 28 days. The results of the samples with 10% and 15% BP have shown higher UPV and less voids content, while the incorporation of CBA aggregate at 20% and 30% caused reduction in UPV and increased the voids in MK-GPC mixture. Furthermore, the addition of the waste clay brick in both forms (powder and aggregate) has improved the results of thermal insulation. Conclusively, reusing of waste clay brick as ingredients in MK-GPC will provide a super-sustainable geopolymer concrete with advanced thermal insulation properties.

012010
The following article is Open access

, , , and

Al 7075 alloys are widely used in many mechanical parts because of their low density, light weight, and corrosion resistance. However, when mechanical parts are used in extreme environments such as high speed, high temperature, and high pressure, wear occurs more than allowable. To solve this problem, research and development of surface thin film deposition technology are increasing. Therefore, in this study, the wear characteristics were studied by depositing Ti films with excellent mechanical properties on Al 7075 according to the surface roughness by the deposition time. Results showed that 60' sputtered specimens after polishing with alumina had the best wear resistance. In addition, the surface roughness of the base material and the deposition time of the thin film affected the wear resistance.

012011
The following article is Open access

, , , , and

In this work, Al2O3:xEu3+ were synthesized by the combustion method. The atomic concentration percentage of En doping was varied (x = 0%, 1%, 3%, 5% and 7at%). Structural and morphological properties were analyzed by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) techniques, respectively. The XRD patterns of the pure (x = 0%) and Eu-doped (x=1at%) show the single Al2O3 corundum phase. For the highest Eu-doped concentrations of x = 3%, x = 5% and x = 7at%, the Al2O3:xEu samples, present a mixture of phases of corundum (Al2O3) and EuAlO3 (perovskite). SEM images show irregular grains with average sizes in the range of 0.1 - 78.8 μm. Photoluminescence (PL) analysis show that all Eu-doped Al2O3 samples exhibits intense red-emission. PL spectra show two main peaks at 615 nm (5D0°7F2) and 700 nm (5D0°7F4). The x = 3at% Eu-doped sample presents the highest intensity under 256 nm excitation. CIE coordinates were calculated from the PL spectra, values around x= 0.6 and y= 0.3 (red emission) were obtained from all samples. Due to its strong luminescence those Al2O3:xEu phosphors could be good candidates for components in solid state lighting.

012012
The following article is Open access

Abstract.In this work, iron oxide γ-Fe2O3 films with thickness of 10 nm were grown on a single crystalline MgO (001) substrate by molecular beam epitaxy using oxidation of an iron thin film at substrate temperature 250 °C. The crystal structure, electronic, and magnetic properties of the ultrathin epitaxial γ-Fe2O3 films were investigated. X-ray photoemission spectroscopy, Low energy electron diffraction, and X-ray diffraction confirmed that films were single crystalline quality with the same orientation as the MgO substrates and had only a single phase of γ-Fe2O3. Furthermore, the magnetization measurements at 300 K showed that the ultrathin films were ferromagnetic with a magnetization value of 270 emu cm−3. These results show that it is possible to synthesize high-quality ultrathin γ-Fe2O3 films with good properties, which are promising as a spin filtering tunnel junction and for application in other spintronic devices, using the iron oxidation method.

012013
The following article is Open access

, , , and

Electronic devices and main boards have a tendency to increase the internal heat radiation performance for excellent thermal conductive materials, as necessary for miniaturization. In this study, Nano-thermal grease was prepared by mixing copper Nano-powder into thermal grease, one of the types of thermal conductive materials, by volume percentage. The thermal conductivity was measured and analyzed. As a result, the thermal conductivity was excellent in the order of Case 5, Case 4, Case 3, Case 2, Case 1. However, when the copper powder of Case 5 or more samples was added, stirring did not proceed smoothly due to the high viscosity. This is considered to be because the maximum capacity of the thermal grease was exceeded.

012014
The following article is Open access

, , , , and

The photocatalytic properties of TiO2 have been studied in the last decade due to its a high capacity to degrade organic compounds which dangerous for the human health. In order to increase its degradation efficiency, we propose the doping of TiO2 with Bi dopant using concentrations from 0 to 5 at%. A simple and fast (40 min) combustion method was used to synthesize Bi doped TiO2. According to the X-ray diffraction patterns, we obtained a mixture of TiO/TiO2 phases with Bi dopant concentrations below 0.5 at.%. Above this value, the Bi7.68O12.16Ti0.32 compound was obtained. The morphological studies by Scanning electron microscopy demonstrated that a porous material is obtained for Bi concentrations below 0.5% but highly coalesced particles appeared for higher concentrations. The Bi doped materials were used to degrade Methylene blue dye under solar exposure and found a maximum degradation percentage of 96% for the sample doped with 0.1 at% of Bi.

Petrochemistry

012015
The following article is Open access

, , and

One of enhanced oil recovery techniques to produce more oil production is surfactant flooding. The surfactants are considered as the effective chemicals used in oilfield in Thailand. It is used to lower the interfacial tension (IFT) of two fluids and to increase mobility in the reservoir. For this study, various chemicals such as amine, fatty alcohol and glycerine are applied as the surfactants to reduce IFT between oil and water. Therefore, the aim of this work is to investigate the potential chemicals and measure the IFT reduction based on the conditions of subsurface at the oilfield in Thailand. These parameters such as temperature, pressure as well as the concentration of surfactant are adjusted to investigate the effects on IFT reduction. From the results, it is reported that pressure from 1, 000 to 2, 000 psi and temperature varied from 70 °C to 90 °C can reduce IFT insignificantly. However, types of chemicals and surfactant concentration are the main parameters that impact on the IFT reduction. Monoethanolamine at 4.0 wt. % can greatly decrease IFT up to 87 % for surfactant concentration. Finally, the results can be applied to use in the real field for enhanced oil production in Thailand.

012016
The following article is Open access

, and

The fluid invasion basically gas in the cement column is a worldwide problem. This is one of the main challenges of oil well industries to protect the wellbore from fluid invasion. This problem has recognized in the mid of 1970 and basic technologies associated with it has not changed significantly. The leakage of gas can cause to the catastrophic events such as blow out and contamination of adjacent aquifer layers leading to environmental concerns. Although much effort has been put forth on gas migration issues, but no efficient solutions have been established to control it. The main reason for this is some lack of understanding the phase behavior of cement slurry. This may be the reason for that there is no standard available till now for gas migration. This study reviews the various causes of occurrence of gas migration in the cement column. Moreover, this study provides a comprehensive insight on gas migration control additives, which is generally be used in oil well industries to protect the fluid invasion in cement slurry.

Material Processing

012017
The following article is Open access

, , , and

This study introduces electrochemical processing into the processing of 4J36 Invar alloy to obtain higher processing accuracy. An experimental study based on central composite design (CCD) was carried out to analyze the effects of voltage, duty cycle, feed rate, and inter-electrode gap on the localization of Invar processing. The response surface method is used to establish a mathematical model between process parameters and processing locality. The model shows that the minimum Side Gap is 158.7μm, and the prediction results are verified by experiments. The prediction error of the mathematical model is 1.44%, which means that the proposed optimal mathematical model can solve the optimal processing parameters of 4J36 Invar alloy.It has a positive significance for the wide application of Invar.

012018
The following article is Open access

, and

In this study the polycarbonate (PC) and carbon fiber (CF) are used as the experimental materials to investigate the impact of injection molding process parameters on tensile strength of weld line using Taguchi method and response surface methodology. The experiments are conducted via 27 sets of parameter combinations designed based on carbon fiber content, melt temperature, mold temperature, injection speed, injection pressure, packing speed, and packing pressure. The process parameter combination with the highest tensile strength is identified using Taguchi method. Later on, the response surface methodology is used to establish the tensile strength predicting formula formed by process parameters in order to understand the correlation between process parameters and tensile strength. The experimental and analysis results indicate the melt temperature and mold temperature have the most significant impacts on tensile strength.

012019
The following article is Open access

, , and

Electrochemical machining (ECM) is widely used in metal parts processing because of its high processing speed, good surface quality, no stress and deformation of the workpiece after processing, and no tool loss. However, when using electrochemical drilling, the taper of the hole is large due to the secondary electrolysis phenomenon. Therefore, this paper aims to reduce the taper of the anode workpiece hole by studying the degree of insulation of the cathode sidewall. The processing of the holes is performed by insulating coating the cathode structures to form different conductive radial heights h0. A multiphysics (electric field, flow field, temperature field and mathematical field) model for simulating ECM machining process using a moving cathode tool is proposed in different modes of conductive radial height h0. The mathematical relationship between the height h0 and the taper of the machined hole is established to obtain the optimum machining method.

Mechanical Engineering

012020
The following article is Open access

, , and

The factors affecting the processing quality of pin hole on the end face of tractor gearbox were analyzed. The main influencing factors on position accuracy of hole group include ambient temperature, the number of workpieces processed by drilling cutter and so on during precision manufacturing. The early warning rules of processing quality during tractor manufacturing process were proposed based on single-factor analysis and double-factors analysis. Then an early warning model for position accuracy of pin hole was established based on LSSVM while PSO was used to optimize the unknown parameters. The experimental results show that the RMSE of the model is 0.0058 and the RE is 0.075%, which verifies the validity of the established processing quality early warning model.

012021
The following article is Open access

and

In this article are reviewed calculate method of force distribution with accounting bearing flexibility on cycloid reducer elements of the types KHV and 2KV. There are analyzed schemas such as gear without machining errors, with constant errors on the pins and with random errors from machining tolerance. Schemas of force distribution on the pins of the types KHV and 2KV are presented. Relation between bearings flexibility and force distribution on the pins are determined, and also relation between machining errors and force distribution on the pins. Advantages and disadvantages of various methods of load estimation in the reducer are elucidated, appliance of this methods for calculation of various types cycloid reducers are analyzed.

012022
The following article is Open access

, , and

Preventive maintenance (PM) for multi-unit parallel system with limited production resource is a crucial issue. To find a solution for the issue, this study focused on a multi-unit parallel system with one repairman and some spare units, and developed an optimization model for the system. In the model, PM policy and cold spare unit number were jointly considered. After optimization, an optimal PM policy with PM interval of running and spare units, PM number and cold spare unit number were obtained. Then, a numerical example was analyzed to illustrate the proposed model, and some results were attained based on the sensitive analysis.

Advanced Manufacturing Technology

012023
The following article is Open access

, and

This paper investigates the improvement of job shop layout with simulation technique. A case study of Siam GN metal sheet, the manufacturer of customized metal sheet products was used. The objective is to increase production efficiency and reduce materials handling distance and time. Data regarding product and machine type were collected. CORELAP (Computerized Relationship Layout Planning) and Group technology based on ROC (rank order clustering) algorithm were applied to design the improved layouts. ARENA software was used to simulate the new layout from both techniques. The simulation show that CORELAP layout reduce production time by 17.12% while group technology layout reduces materials handling time by 11.41%. CORELAP layout therefore, was chosen for implementation. Simulation techniques allows user to experiment with different scenario hence selecting the most appropriate one without interfering with the actual process.

012024
The following article is Open access

, and

Manufacturing is the key to today's industrial competitiveness, and it is broadly classified into two categories, subtractive and additive. In current study, the ability to predictively model manufacturing performance attributes in both categories is introduced. In subtractive manufacturing, modeling of laser-assisted and ultrasonic vibration-assisted milling are presented. In laser-assisted milling, the laser preheating temperature field is predicted, and the dynamic recrystallization as well as grain growth triggered under high temperature is considered, which enhances the accuracy of force and residual stress prediction. In ultrasonic vibration-assisted milling, the intermittent effect is considered through tool-workpiece separation criteria. And the force reduction in ultrasonic vibration-assisted milling is accurately predicted. In additive manufacturing, laser-assisted metal additive manufacturing is introduced. And the predictive modeling of temperature field in powder bed metal additive manufacturing is presented. The model considers heat transfer boundary including heat loss from convection and radiation at the part boundary. Through the comparison between measured and calculated molten pool dimensions, the model is proven to have high computational efficiency and high prediction accuracy.

012025
The following article is Open access

, , and

In order to achieve dynamic production of smart plants, it is necessary to dynamically adjust schedule for disturbances in the manufacturing process. An executable optimized rescheduling plan needs developing, so the study of rescheduling cost is necessary. Based on the essential analysis of the rescheduling problem, a new flexible job shop rescheduling execution cost is proposed. The correctness of the execution cost is illustrated by the application in a modified genetic algorithm. The result shows that the rescheduling method with the execution cost as the fitness can generate a new plan with less deviation from the original schedule, which has a great significance for actual manufacturing.

012026
The following article is Open access

, , , and

The industrial growth introduced the Industry 4.0 revolution, which uses several IoT-based technologies to manage the huge amount of data generated by its connected systems. This revolution aims to exchange data between the different parts and improve the performance of the manufacturing process. Facing several limitations, this paradigm needs the Fog Computing to ameliorate the Cloud services and the distribution of real-time decision-making and the secure and interoperable data analysis. The internal logistics presents the need to transmit and treat the data in real-time to take a more efficient decisions in a shorter delay. The Fog-based architecture is composed of terminal devices, Edge, Fog and Gateway devices. A model is presented to optimize the Fog integration (The cost of the links and nodes). Experimental results of an exact method optimization using Fico Xpress show a reduction of the Fog Computing integration cost in an internal logistic center.