Suck-Joo Na

Prof. Suck-Joo Na

School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
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Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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29 September 2020 in Journal of Manufacturing Science and Engineering
Verified
Journal Article
Closed access
PDF file
YuMing ZhangYuMing Zhang
YuMing Zhang
YYYu-Ping Yang
Yu-Ping Yang
WZWei Zhang
Wei Zhang
SNSuck-Joo Na
Suck-Joo Na
Welding is a major manufacturing process that joins two or more pieces of materials together through heating/mixing them followed by cooling/solidification. The goal of welding manufacturing is to join materials together to meet service requirements at lowest costs. Advanced welding manufacturing is to use scientific methods to realize this goal. This paper views advanced welding manufacturing as a three step approach: (1) pre-design that selects process and joint design based on available processes (properties, capabilities, and costs); (2) design that uses models to predict the result from a given set of welding parameters and minimizes a cost function for optimizing the welding parameters; and (3) real-time sensing and control that overcome the deviations of welding conditions from their nominal ones used in optimizing the welding parameters by adjusting the welding parameters based on such real-time sensing and feedback control. The paper analyzes how these three steps depend on process properties/capabilities, process innovations, predictive models, numerical models for fluid dynamics, numerical models for structures, real-time sensing, and dynamic control. The paper also identifies the challenges in obtaining ideal solutions and reviews/analyzes the existing efforts toward better solutions. Special attention and analysis have been given to (1) gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW) as benchmark processes for penetration and materials filling; (2) keyhole plasma arc welding (PAW), keyhole-tungsten inert gas (K-TIG), and keyhole laser welding as improved/capable penetrative processes; (3) friction stir welding (FSW) as a special penetrative low heat input process; (4) alternating current (AC) GMAW and double-electrode GMAW as improved materials filling processes; (5) efforts in numerical modeling for fluid dynamics; (6) efforts in numerical modeling for structures; (7) challenges and efforts in seam tracking and weld pool monitoring; (8) challenges and efforts in monitoring of keyhole laser welding and FSW; and (9) efforts in advanced sensing, data fusion/sensor fusion, and process control using machine learning/deep learning, model predictive control (MPC), and adaptive control.

1 January 2020 in Journal of Manufacturing Processes
Verified
Journal Article
Closed access
JLJian Long
Jian Long
LZLin-Jie Zhang
Lin-Jie Zhang
LZLiang-Liang Zhang
Liang-Liang Zhang
XWXiang Wang
Xiang Wang
GZGui-Feng Zhang
Gui-Feng Zhang
SNSuck-Joo Na
Suck-Joo Na

15 January 2016 in Welding in the World
Verified
Journal Article
Closed access
PDF file
SHSang-Woo Han
Sang-Woo Han
JAJunsu Ahn
Junsu Ahn
SNSuck-Joo Na
Suck-Joo Na

8 January 2013 in Welding in the World
Verified
Journal Article
Closed access
PDF file
SHSang-Woo Han
Sang-Woo Han
WCWon-Ik Cho
Won-Ik Cho
SNSuck-Joo Na
Suck-Joo Na
Cheolhee KimCheolhee Kim
Cheolhee Kim

30 January 2013 in Welding in the World
Verified
Journal Article
Closed access
PDF file
DCDae-Won Cho
Dae-Won Cho
SNSuck-Joo Na
Suck-Joo Na
MCMin-Hyun Cho
Min-Hyun Cho
JLJong-Sub Lee
Jong-Sub Lee

11 April 2015 in The International Journal of Advanced Manufacturing Technology
Verified
Journal Article
Closed access
PDF file
MSMuhammad Sohail
Muhammad Sohail
SHSang-Woo Han
Sang-Woo Han
SNSuck-Joo Na
Suck-Joo Na
AGAndrey Gumenyuk
Andrey Gumenyuk
Michael RethmeierMichael Rethmeier
Michael Rethmeier