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Reliability Design Lab (Joining and Welding Research Institute)
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The lab evaluates the strength and reliability of welded and joined parts.
AboutAbout the lab
Evaluating structural performance and reliability through welding and joining
The Joining Structural Design Field (Reliability Design Division) studies how to evaluate the performance and reliability of welded and joined members and various structures.
The lab approaches evaluation along two axes: a time axis called "through-process," which spans the whole life cycle of a structure, and a spatial axis called "trans-scale," which ranges from micro to macro.
In particular, the lab develops methods to evaluate the effects of thermal processing, typified by residual stress and distortion, from both microscopic and macroscopic perspectives.
The lab aims to build a design science that can contribute to advancing structure-building processes that use welding and joining.
Key terms
- Through-process
- The time axis spanning the whole life cycle of a structure, from design and construction through testing and service to repair, reinforcement, and maintenance
- Trans-scale
- The spatial axis ranging from micro to macro, from material microstructure to welded and joined members and whole structures
- Residual stress
- Stress that remains inside a member even after heating or processing such as welding has finished
ResearchResearch themes
The lab studies the evaluation of structural performance and reliability at every stage from design and construction to maintenance, and at every scale from material microstructure to whole structures. It develops methods to evaluate, in detail and rationally, the effects of thermal processing, typified by residual stress and distortion.
*Illustrative imageStrength and reliability evaluation of members and joints
The lab works on building methods to evaluate the strength characteristics and reliability of members and of welded and joined parts.
*Illustrative imagePerformance evaluation considering residual stress
The lab develops techniques to evaluate the performance of welded steel structures while taking residual stress into account.
*Illustrative imageSimulation of thermal processing
The lab develops simulation techniques for thermal processing, intended for application in design.
*Illustrative imageEvaluation of microscopic plastic deformation and damage
The lab works on building methods to evaluate damage that take into account the microscopic plastic deformation behavior of materials.
MembersFaculty
The members of the Reliability Design Lab are faculty members.
- ProfessorYoshiki Mikami
VoicesStudent voices
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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: “Friction welding joint” Shanjeevi. C, Satish Kumar. S, Sathiya.P / CC BY-SA 4.0 (cropped)
- Strength and reliability evaluation of members and joints: “Biaxial tensile machine” Lucaintro / CC BY-SA 4.0 (cropped)
- Performance evaluation considering residual stress: “XYZ stage powder diffraction of solid sample” Warrenmck / CC BY-SA 4.0 (cropped)
- Simulation of thermal processing: “Heat-Treating-Furnace” Ichudov / CC BY-SA 3.0 (cropped)
- Evaluation of microscopic plastic deformation and damage: “Failed threaded insert in cast aluminium” Phiarc / CC BY-SA 4.0 (cropped)
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