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Advanced Design for Manufacturing Processes (Second Volume)
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Advanced Design for Manufacturing Processes (Second Volume)

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: closed (20 June 2022) | Viewed by 8729

Special Issue Editors

Prof. Dongkyoung Lee

E-Mail Website
Guest Editor
Department of Mechanical and Automotive Engineering, Kongju National University, Engineering Building 4 #223, 1223-24 Cheonandaero, Seobuk-gu, Cheonan 31080, Korea
Interests: advanced mechanical design and manufacturing processes; laser aided manufacturing; laser-aided manufacturing; laser cutting; laser welding; laser drilling; laser surface treatement; concrete composite materials; lithium-ion batteries; cell culture plate
Special Issues, Collections and Topics in MDPI journals
Dr. Sukhoon Pyo

E-Mail Website
Guest Editor
Department of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
Interests: ultra high performance concrete; sound-absorbable high performance concrete; railway; composites; sustainable construction materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Manufacturing plays a significant role in the development of modern science and technology. More importantly, engineering products in the semiconductor, consumer electronics, mobile, and display fields and in the automotive, ship building, aviation, and building construction industries can be produced with the aid of advanced manufacturing technology. Advanced manufacturing industries increasingly integrate new innovative technologies in both products and processes. As advanced manufacturing processes are being adapted in a wide range of engineering fields, the design of manufacturing is becoming important. Since materials science and manufacturing include various engineering research areas, it is important to integrate a wide spectrum of knowledge in these research fields to accelerate government and industrial development. Therefore, this Special Issue on “Advanced Design for Manufacturing Processes (Second Volume)” will aim to provide an opportunity to integrate a wide spectrum of knowledge in the field of materials design and manufacturing processes.

This Special Issue of Materials focuses on all aspects of current scientific and technological progress related to the advanced design for manufacturing processes. Topics of interest include mechanical and material properties of materials for manufacturing design; advanced design of composite materials, such as concrete composites; advanced manufacturing processes, including laser-aided manufacturing, additive manufacturing, and nano- and micro-manufacturing; and materials design and manufacturing of lithium-ion batteries.

It is our pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews that address advances in mechanical and materials design and manufacturing processes are welcome.

Prof. Dongkyoung Lee
Prof. Dr. Sukhoon Pyo
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • manufacturing processes
  • advanced design and manufacturing
  • mechanical properties
  • material properties
  • mechanical engineering
  • materials science and engineering
  • composite materials
  • ultra-high-performance concrete
  • laser-aided manufacturing
  • laser material processing
  • nano- and micromanufacturing
  • concrete composites
  • materials design and manufacturing of lithium-ion batteries
  • 3D printing
  • additive manufacturing

Published Papers (4 papers)

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Research

15 pages, 35782 KiB  
Article
Stiffener Design to Maintain Line Heating Efficiency during the Lifting Process Considering Phase Transformation
by Hong-Jun Noh, Hun-Bong Lim, Hee-Chan Yoon, Young-Hwan Han and Hyun-Ik Yang
Materials 2022, 15(1), 119; https://doi.org/10.3390/ma15010119 - 24 Dec 2021
Cited by 2 | Viewed by 2102
Abstract
In the shipbuilding industry, welding is the main technique used to join steel structures. There is a lifting process, post-welding, that can eliminate the correction effect of line heating. Line heating is reperformed after the lifting process. This can significantly delay the ship [...] Read more.
In the shipbuilding industry, welding is the main technique used to join steel structures. There is a lifting process, post-welding, that can eliminate the correction effect of line heating. Line heating is reperformed after the lifting process. This can significantly delay the ship assembly process. Herein, we present a design method for installing a permanent stiffener to avoid the disappearance of the line heating effect during the lifting process. The change in physical properties due to heating and cooling of the line heating is calculated. The limiting stress, at which the effect of the line heating completely disappears, based on the inherent strain theory, is obtained. The phase fraction by the cooling rate is calculated using the continuous cooling transformation diagram and the Kiustinen–Marburgerm equation. Physical properties affected by the phase transformation are calculated, considering the physical properties and fraction of each phase. The square plate theory and superposition principle are used to construct a local model, with a stiffener, of the ship block. The stress caused by the shape of the stiffener and the distance between the stiffeners were calculated for the local model. The calculated stress and the limiting stress were compared to determine, for the expected line heating efficiency, the most acceptable stiffener design. Finally, to confirm the elimination of the problem, the designed stiffener is analyzed using the finite element method. Full article
(This article belongs to the Special Issue Advanced Design for Manufacturing Processes (Second Volume))
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11 pages, 4834 KiB  
Article
Effect of Au-Coating on the Laser Spot Cutting on Spring Contact Probe (SCP) for Semi-Conductor Inspection
by Youngjin Seo, Jungsoo Nam, Huitaek Yun, Martin Byung Guk Jun and Dongkyoung Lee
Materials 2021, 14(12), 3300; https://doi.org/10.3390/ma14123300 - 15 Jun 2021
Cited by 2 | Viewed by 2132
Abstract
Spring contact probes (SCPs) are used to make contact with various test points on printed circuit boards (PCBs), wire harnesses, and connectors. Moreover, they can consist of the test interface between the PCBs and the semiconductor devices. For mass production of SCPs, ultra-small [...] Read more.
Spring contact probes (SCPs) are used to make contact with various test points on printed circuit boards (PCBs), wire harnesses, and connectors. Moreover, they can consist of the test interface between the PCBs and the semiconductor devices. For mass production of SCPs, ultra-small precision components have been manufactured by conventional cutting methods. However, these cutting methods adversely affect the performance of components due to tool wear and extreme shear stress at the contact point. To solve this problem, laser spot cutting is applied to Au-coated SCP specimens as an alternative technique. A 20 W nano-second pulsed Ytterbium fiber laser is used, and the experimental variables are different laser parameters including the pulse duration and repetition rate. After the spot cutting experiments, the heat-affected zone (HAZ) and material removal zone (MRZ) formed by different total irradiated energy (Etotal) was observed by using a scanning electron microscope (SEM). Then, the size of HAZ, top and bottom parts of MRZ, and roundness were measured. Furthermore, the change rate of HAZ and MRZ on Au-coated and non-coated specimens was analyzed with regard to different pulse durations. Based on these results, the effect of Au-coating on the SCP was evaluated through the comparison with the non-coated specimen. Consequently, in the Au-coated specimen, hole penetration was observed at a low pulse duration and low total energy due to the higher thermal conductivity of Au. From this study, the applicability of laser spot cutting to Au-coated SCP is investigated. Full article
(This article belongs to the Special Issue Advanced Design for Manufacturing Processes (Second Volume))
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10 pages, 10706 KiB  
Article
An Experimental Investigation on the Cutting Quality of Three Different Rock Specimens Using High Power Multimode Fiber Laser
by Mang-Muan Lian, Youngjin Seo and Dongkyoung Lee
Materials 2021, 14(11), 2972; https://doi.org/10.3390/ma14112972 - 31 May 2021
Cited by 2 | Viewed by 2425
Abstract
The laser cutting of rock has been popular recently because of its advantages over traditional rock cutting methods. Several types of research were performed to replace traditional rock cutting techniques with laser cutting. The purpose of this experiment is to observe cutting quality [...] Read more.
The laser cutting of rock has been popular recently because of its advantages over traditional rock cutting methods. Several types of research were performed to replace traditional rock cutting techniques with laser cutting. The purpose of this experiment is to observe cutting quality for intrusive igneous rocks using a high-power multimode fiber laser. The cutting quality, in terms of kerf width and penetration depth, resulted from different scanning speeds and was studied and compared. The specimens used in this study were gabbro, granite, and diorite, which are widely applied in the construction industry because of their high compressive strength and beautiful textures. Energy-dispersive X-ray Spectroscopy (EDX) analyses were conducted to observe the chemical content of three different areas, the melting area, the burnt area, and a non-processed area, for each rock specimen. The study of the compositional changes in each area will also go over the cutting quality of each rock specimen at different scanning speeds. According to the experimental results, the kerf widths of the specimens gradually decrease as the scanning speeds increase. The penetration depths into the specimens sharply decrease as scanning speeds increase. From a study of their compositional changes, it is found that the cutting quality for each rock depends on their silica content. This study summarizes that the cutting quality for a rock specimen greatly depends on the scanning speed of the laser cutting. Full article
(This article belongs to the Special Issue Advanced Design for Manufacturing Processes (Second Volume))
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11 pages, 4940 KiB  
Article
Effect of Fluence and Multi-Pass on Groove Morphology and Process Efficiency of Laser Structuring for 3D Electrodes of Lithium-Ion Batteries
by Dongkyu Park and Dongkyoung Lee
Materials 2021, 14(5), 1283; https://doi.org/10.3390/ma14051283 - 08 Mar 2021
Cited by 7 | Viewed by 2095
Abstract
Lithium-ion batteries (LIBs) are widely used as energy storage systems. With the growing interest in electric vehicles, battery performance related to traveling distance has become more important. Therefore, there are various studies going on to achieve high-power and high-energy batteries. Laser structuring of [...] Read more.
Lithium-ion batteries (LIBs) are widely used as energy storage systems. With the growing interest in electric vehicles, battery performance related to traveling distance has become more important. Therefore, there are various studies going on to achieve high-power and high-energy batteries. Laser structuring of electrodes involves a groove being produced on electrodes by a laser. This technique was used to show that battery performance can be enhanced due to improving Li-ion diffusion. However, there is a lack of studies about the morphological variation of grooves and process efficiency in laser parameters in the laser structuring of electrodes. In this study, the LiFePO4 cathode is structured by a nanosecond laser to analyze the morphological variation of grooves and process efficiency depending on laser fluence and the number of passes. First, the various morphologies of grooves are formed by a combination of fluences and the number of passes. At a fluence of 0.86 J/cm2 and three passes, the maximum aspect ratio of 1.58 is achieved and the surface area of structured electrodes is greater than that of unstructured electrodes. Secondly, three ablation phenomena observed after laser structuring are classified according to laser parameters through SEM images and EDX analysis. Finally, we analyze the amount of active material removal and process efficiency during laser structuring. In conclusion, applying low fluence and multi-pass is assumed to be advantageous for laser structuring of electrodes. Full article
(This article belongs to the Special Issue Advanced Design for Manufacturing Processes (Second Volume))
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