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Joining Structural Design Lab
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The lab develops methods to evaluate the performance and reliability of welded and joined members and structures.
AboutAbout the lab
Evaluating structural performance along two axes: time and space.
The lab studies how to evaluate the performance and reliability of various kinds of structures.
It views the life cycle, from design and construction through testing and service to repair, reinforcement, and maintenance, along a time axis called the “through-process.”
It views the range from material microstructure through welded and joined members to whole structures, from micro to macro, along a spatial axis called “trans-scale.”
The lab aims to build a design science that contributes to advancing structuring processes that use welding and joining.
The lab is a research field in the Joining Evaluation Division of the Joining and Welding Research Institute.
Key terms
- Through-process
- The time axis covering a structure's life cycle, from design, fabrication, and construction through testing and service to repair, reinforcement, and maintenance.
- Trans-scale
- The spatial axis from micro to macro, covering material microstructure, welded and joined members, and whole structures.
- Residual stress
- Stress that remains inside a member after thermal processing such as welding. Along with deformation, it is a representative effect of thermal processing.
ResearchResearch themes
The lab evaluates the performance and reliability of structures at each stage and scale, along two axes: the “through-process,” which spans a structure's life cycle, and “trans-scale,” which spans material microstructure to whole structures. It aims to build a design science that contributes to advancing structuring processes that use welding and joining.
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MembersFaculty
- ProfessorYoshiki Mikami
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “New end posts” Beta Engineering / Public domain (cropped)
- Performance Evaluation Methods That Account for the Effects of Thermal Processing: “US Army soldier welding two metal pieces, Fort Gregg-Adams, Virginia, March 2025” Juan F. Jimenez, Army / Public domain (cropped)
- Related lab (接合組織評価学分野): “Fillet joint friction stir welding (FSW) equipment for welding the fillet joint of an electric vehicle frame” Hwanjin Kim,1 Kwangjin Lee,2Jaewoong Kim,3 Changyeon Lee,4 Yoonchul Jung5 and Sungwook Kang,6* 1 Department of Mechanical Engineering, Gyeongsang National University, Jinju 52828, Korea 2 Carbon Materials Application R&D Group, Korea Institute of Industrial Technology, Jeonju 54853, Korea 3 Smart Mobility Materials and Components R&D Group, Korea Institute of Industrial Technology, Gwangju 61012, Korea 4 Technical Center: Daejoo Kores Co., LTD., Wanju 55316, Korea 5 Dongnam Division, Korea Institute of Industrial Technology, Busan 46938, Korea 6 Precision Mechanical Process and Control R&D Group, Korea Institute of Industrial Technology, Jinju 52845, Korea * Author to whom correspondence should be addressed. / CC BY 4.0 (cropped)
- Related lab (接合構造化解析学分野): “Tandem welding torch 002” Pipimaru / CC BY-SA 3.0 (cropped)
- Related lab (微細接合学分野): “Electronic Printed Circuit Board” JayHand / CC BY-SA 3.0 (cropped)
- Related lab (複合化機構学分野): “Composite 3d” PerOX / Public domain (cropped)
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