Controlling Parameters of Residual Stresses and Deformations in Welded Thin Cylindrical Shells
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概要
- 論文の詳細を見る
The present paper is concerned with the residual stresses and deformations caused by a circumferential and/or longitudinal welding of a thin-walled cylindrical shell of mean radius a, wall thickness h and length l. Based upon experimental data by GMA welding process and analytical results in the previous papars, t/ie controlling parameters or combined effect of heat input and size of cylinder on the residual stresses and deformations, are discussed. In the circumferential-welded cylinders, the residual stresses σ_θ/σ_Y, σ_x/σ_Y in circumferential and longitudinal directions and deflections ω/aεy at a distance x/√<ah> from the weld centerline are determined by the following two parameters: Heat input parameter H_θ= Q/cρh√<ah> Size parameter β_θ = l/√<ah> whereσ_y, ε_y, c and ρ are yield stress, yield strain, specific heat and density of the material respectively, and Q_ is net heat input per unit weld length. When the size parameter β_θ exceeds a clitical value, (β_θ)_<cr>, depending upon the heat inputparameter Hg, the residual stresses and deformations ate determined uniquely by the heat input parameter H_θ. In the longitudinal-welded cylinders, the residual stressesσ_θ/σ_Y, σ_x/σ_Y and deflections √<h/aω/lε_Y at an angleθ from the weld centerline on the mid-cross section are decided by the following parameters: Heat input parameter H_x = Q/2cρπah Size parameter β_x=√<h/a(l/a) In the range of the size parameters β_x larger than its critical value, (β_x)_<cr> =≒ 3, the only controlling parameter is the heat input parameter H_x. When the size parameter exceeds its critical value, the residual stresses and deflections are expressed as functions of the heat input parameters. The calculated values agree with the experimental results.
- 社団法人溶接学会の論文
- 1986-04-01
著者
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SATOH Kunihiko
Department of Science, Hokkaido University of Education
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Hirano Toshio
Department of Molecular Oncology
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Satoh Kunihiko
Department Of Welding Engineering Osaka University
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Toyoda Masao
Department Of Welding & Production Engineering Faculty Of Engineering Osaka University
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Toyoda Msaao
Osaka University
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TOYODA Masao
Osaka University
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Hirano Toshio
Department Of Mechanical Engineering Takamatsu National College Of Technology
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Hirano Toshio
Department Of Biochemistry Institute For Medical Immunology Kumamoto University School Of Medicine:(
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SUITA Yoshikazu
Department of Mechanical Engineering, Takamatsu National College of Technology
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TANAKA Masahumi
Department of Mechanical Engineering, Takamatsu National College of Technology
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Suita Yoshikazu
Department Of Electro-mechanical Systems Engineering Takamatsu National College Of Technology
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Suita Yoshikazu
Department Of Mechanical Engineering Takamatsu National College Of Technology
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Suita Yoshikazu
Takamatsu National College Of Technology
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Tanaka Masahumi
Department Of Mechanical Engineering Takamatsu National College Of Technology
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Toyoda Masao
Department Of Hematology Nephrology And Rheumatology Akita University Graduate School Of Medicine
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Tanaka Masabumi
Department Of Mechanical Engineering Takamatsu National College Of Technology
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Satoh Kunihiko
Department Of Science Hokkaido University Of Education
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Toyoda Masao
Department Of General And Gastroenterological Surgery Osaka Medical College
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Suita Yoshikazu
Department Of Electro-mechanical Systems Engineering Kagawa National College Of Technology
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SATOH KUNIHIKO
Department of Internal Medicine, School of Medicine, Keio University
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