柴原 正和
著者に関連した記事は8件です。
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第14回
ショットピーニング時の残留応力緩和挙動に関する検討
著者:
木谷 悠二,Yuji KITANI,柴原 正和,Masakazu SHIBAHARA,生島 一樹,Kazuki IKUSHIMA,山田 祐介,Yusuke YAMADA,西川 聡,Satoru NISHIKAWA,古川 敬,Takashi FURUKAWA,秋田 貢一,Koichi AKITA,鈴木 裕士,Hiroshi SUZUKI,諸岡 聡,Satoshi MOROOKA
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FEM multilayered welding non-linear analysis Residual stress Shot peening
木谷 悠二,Yuji KITANI,柴原 正和,Masakazu SHIBAHARA,生島 一樹,Kazuki IKUSHIMA,山田 祐介,Yusuke YAMADA,西川 聡,Satoru NISHIKAWA,古川 敬,Takashi FURUKAWA,秋田 貢一,Koichi AKITA,鈴木 裕士,Hiroshi SUZUKI,諸岡 聡,Satoshi MOROOKA
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FEM multilayered welding non-linear analysis Residual stress Shot peening
In nuclear power plants, surface treatment including the shot peening is carried out after welding for the prevention of stress corrosion cracking. In this research, the authors developed evaluation systems of the persistence of compressive residual stresses due to shot peening based on the Idealized Explicit FEM which can conduct large-scale non-linear structure analyses in realistic computing time. The developed evaluation system was applied to the analysis of the compressive residual stress due to sho...
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Study of behaver to relieve residual stress at the time of the shot peening
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Study of behaver to relieve residual stress at the time of the shot peening
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）
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modified contour method residual stress Stress measurement
加藤 拓也,沖見 優衣,生島 一樹,柴原正和,（大阪府立大）
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modified contour method residual stress Stress measurement
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....
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Measurement of Weld Residual Stress Distribution using the Modified Contour Method
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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）
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Redidual Stress，FEM，Reinforecement Learning
里 明起照,橋詰 光,加藤 拓也,生島 一樹,柴原 正和,（大阪府立大）
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Redidual Stress，FEM，Reinforecement Learning
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 ...
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Development of a Welding Sequence Optimization System for Reducing Residual Stress in Welding Using Reinforcement Learning
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Development of a Welding Sequence Optimization System for Reducing Residual Stress in Welding Using Reinforcement Learning
第14回
応力改善工法で付与した圧縮残留応力の持続性評価-ショットピーニングを施した溶接継手の熱サイクル及び応力負荷による残留応力変化（第2報）
著者:
西川 聡,Satoru NISHIKAWA,古川 敬,Takashi FURUKAWA,秋田 貢一,Koichi AKITA,鈴木 裕士,Hiroshi SUZUKI,諸岡 聡,Satoshi MOROOKA, ハルヨ ステファヌス,Stefanus HARJO,柴原 正和,Masakazu SHIBAHARA,生島 一樹,Kazuki IKUSHIMA,木谷 悠二,Yuji KITANI,山田 祐介,Yusuke YAMADA
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butt welded pipe compressive residual stress relaxation shot peening stress loading thermal treatment
西川 聡,Satoru NISHIKAWA,古川 敬,Takashi FURUKAWA,秋田 貢一,Koichi AKITA,鈴木 裕士,Hiroshi SUZUKI,諸岡 聡,Satoshi MOROOKA, ハルヨ ステファヌス,Stefanus HARJO,柴原 正和,Masakazu SHIBAHARA,生島 一樹,Kazuki IKUSHIMA,木谷 悠二,Yuji KITANI,山田 祐介,Yusuke YAMADA
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butt welded pipe compressive residual stress relaxation shot peening stress loading thermal treatment
To validate the FEM simulation technique presented in the previous report, we made pipe butt welded joints between base metals of the same material SUS316L and between base metals of the dissimilar materials SUS316L and STPT370. Shot peening (SP) on the outer surface or the inner surface of these welded joints induces high compressive residual stresses on the surface. After heat treatment with the peak temperature of 623 K was applied to the welded joints, they retained high compressive residual stresses ...
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Evaluation of the sustainability of compressive residual stress by introduced a stress improvement method (the second report) ?Residual stress change of welded joint with shot peening by thermal cycle and stress loading.
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Evaluation of the sustainability of compressive residual stress by introduced a stress improvement method (the second report) ?Residual stress change of welded joint with shot peening by thermal cycle and stress loading.
第14回
応力改善工法で付与した圧縮残留応力の持続性評価-理想 化陽解法 FEM を用いたショットピーニング解析手法の開発 (第 1 報)
著者:
山田 祐介,Yusuke YAMADA,柴原 正和,Masakazu SHIBAHARA,生島 一樹,Kazuki IKUSHIMA,木谷 悠二,Yuji KITANI,西川 聡,Satoru NISHIKAWA,古川 敬,Takashi FURUKAWA,秋田 貢一,Koichi AKITA,鈴木 裕士,Hiroshi SUZUKI,諸岡 聡,Satoshi MOROOKA
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Elastic plastic analysis FEM Residual stress Shot peening
山田 祐介,Yusuke YAMADA,柴原 正和,Masakazu SHIBAHARA,生島 一樹,Kazuki IKUSHIMA,木谷 悠二,Yuji KITANI,西川 聡,Satoru NISHIKAWA,古川 敬,Takashi FURUKAWA,秋田 貢一,Koichi AKITA,鈴木 裕士,Hiroshi SUZUKI,諸岡 聡,Satoshi MOROOKA
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Elastic plastic analysis FEM Residual stress Shot peening
When the steel structure is built such as nuclear power plant, residual stress occurs in or near the welding joint and it may cause the stress collision cracking(SCC). Therefore, as prediction of SCC, surface treatment such as the shot peening(following SP) is carried out in the weld, but the case analyzed about residual stress reforming by the SP does not exist. So, we developed the analysis method that can predict compressive residual stress relaxation behavior during shot peening by modelling dynami...
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Evaluation of the sustainability of compressive residual stress by introduced a stress improvement method (the first report) -Development of analysis method of the shot peening using idealized explicit FEM
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Evaluation of the sustainability of compressive residual stress by introduced a stress improvement method (the first report) -Development of analysis method of the shot peening using idealized explicit FEM
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）
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Creep Digital Twin Life Expectancy Diagnosis Pipe Thermal Power Plant
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）
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Creep Digital Twin Life Expectancy Diagnosis Pipe Thermal Power Plant
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...
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Digital Twin for Fracture Life Expectancy Diagnosis of Thermal Power Plant Pipe
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Digital Twin for Fracture Life Expectancy Diagnosis of Thermal Power Plant Pipe
第11回
理想化陽解法FEM を用いた実機多パス溶接継手の残留応力解析
著者:
西川 聡,Satoru NISHIKAWA,生島 一樹,Kazuki IKUSHIMA,柴原 正和,Masakazu SHIBAHARA
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butt welded pipe dissimilar welded joint idealized explicit FEM multi-pass welding residual stress three dimensions analysis
西川 聡,Satoru NISHIKAWA,生島 一樹,Kazuki IKUSHIMA,柴原 正和,Masakazu SHIBAHARA
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butt welded pipe dissimilar welded joint idealized explicit FEM multi-pass welding residual stress three dimensions analysis
In welds of steel structure of nuclear power plants, stress corrosion cracking and fatigue cracking occur, and the residual stress due to welding becomes one of the main factors causing them. Therefore, it is necessary to understand the residual stress distribution of a welded region, and residual stress analysis performed by the finite element method (FEM) has been become an effective tool. Previously, in order to shorten computation time, the analyses are carried out in a two-dimensional model and th...
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Residual stress analysis of multi-pass welded joint in nuclear power plant using idealized explicit FEM.
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Residual stress analysis of multi-pass welded joint in nuclear power plant using idealized explicit FEM.
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）
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IEFEM Large-scale analysis Multilayer welding residual stress stress corrosion cracking
手銭 永遠,前田 新太郎,生島 一樹,柴原 正和,（大阪府立大）
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IEFEM Large-scale analysis Multilayer welding residual stress stress corrosion cracking
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 ...
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Large-Scale 3D Residual Stress Analysis of Cylindrical Multilayer Welded Joints Using Idealized Explicit FEM
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Large-Scale 3D Residual Stress Analysis of Cylindrical Multilayer Welded Joints Using Idealized Explicit FEM