第17回
修正コンター法を用いた溶接残留応力分布の測定
著者:
加藤 拓也,沖見 優衣,生島 一樹,柴原正和,(大阪府立大)
発刊日:
公開日:
キーワードタグ:
Welding is an indispensable technology for large steel structures in recent years. However, weld residual stresses in welded joints cause a reduction in brittle fracture strength and fatigue fracture strength, so a simple method to measure residual stresses has been developed by improving the contour method. In the proposed method, the residual stress can be measured even if the cut is made asymmetrically, whereas in the conventional method the cut has to be made symmetrically....
英字タイトル:
Measurement of Weld Residual Stress Distribution using the Modified Contour Method
第17回
強化学習を用いた溶接残留応力低減のための溶接順序最適化システムの開発
著者:
里 明起照,橋詰 光,加藤 拓也,生島 一樹,柴原 正和,(大阪府立大)
発刊日:
公開日:
キーワードタグ:
Currently, various welding is performed in the process of manufacturing all kinds of structures such as ships and bridges, and metal 3Dprinters are attracting attention in recent years. However, there are several problems in these manufacturing method. Residual stress occurs inside the products due to thermal processing. It is thought that defects such as cracks during manufacturing, deformation and fatigue fracture are caused by the tensile stress on the surface. Therefore, it is necessary to optimize the ...
英字タイトル:
Development of a Welding Sequence Optimization System for Reducing Residual Stress in Welding Using Reinforcement Learning
第17回
火力発電プラント配管の破断余寿命診断のデジタルツイン
著者:
高橋 陸,木谷 悠二,小野 進,(大坂府立大),西田 秀高,(中国電力),西ノ入 聡,(電中研),生島 一樹,柴原 正和,(大阪府立大)
発刊日:
公開日:
キーワードタグ:
In recent years, there has been a growing demand for power generation from renewable energy sources. However, power generation from renewable energy sources is characterized by the fact that it is highly dependent on weather conditions, and thermal power generation requires large changes in output to adjust power. The sudden changes in temperature and strain that occur during this process have a significant impact on the remaining life of the equipment. In this study, we developed a system to identify inter...
英字タイトル:
Digital Twin for Fracture Life Expectancy Diagnosis of Thermal Power Plant Pipe
第17回
理想化陽解法FEMによる円筒多層溶接継手の大規模3次元残留応力解析
著者:
手銭 永遠,前田 新太郎,生島 一樹,柴原 正和,(大阪府立大)
発刊日:
公開日:
キーワードタグ:
Thick plates are used in steel structures of nuclear power plants, and multi-layer welding is used in their manufacturing methods and assembly. However, when the welds are constructed, residual stresses are generated near the welds that may cause stress corrosion cracking and fatigue cracking. Currently, numerical analysis using the nonlinear finite element method (FEM) based on thermo-elastic plastic analysis theory is commonly used as a method for predicting weld residual stress, but the calculation time ...
英字タイトル:
Large-Scale 3D Residual Stress Analysis of Cylindrical Multilayer Welded Joints Using Idealized Explicit FEM