Structural integrity and quality assurance of welded components in ship-building process considering with multi-physics phenomena of thermal processing

• Project/Area Number: 15H02329
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Naval and maritime engineering
• Research Institution: Osaka University
• Principal Investigator: MOCHIZUKI Masahito 大阪大学, 工学研究科, 教授 (10304015)
• Co-Investigator(Kenkyū-buntansha): 岡野 成威 大阪大学, 工学研究科, 准教授 (00467531)
• Project Period (FY): 2015-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥34,320,000 (Direct Cost: ¥26,400,000、Indirect Cost: ¥7,920,000); Fiscal Year 2018: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2017: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000); Fiscal Year 2016: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000); Fiscal Year 2015: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
• Keywords: 建造・艤装 / 品質 / 信頼性評価システム / 溶接 / 切断 / 矯正 / 溶接・接合工学 / 熱加工プロセス / マルチフィジクス / 信頼性評価 / 構造性能

Outline of Final Research Achievements

Structural integrity and quality assurance of welded components in ship-building process are developed considering with multi-physics analysis and high-precision measurement in this study. Numerical simulation of the thermal process treatments such as cutting, welding, and correcting are investigated with the scope of three fundamental elements; materials science, process physics, and thermal process mechanics.

Academic Significance and Societal Importance of the Research Achievements

本研究は，材料・熱・力学という熱加工現象の本質的なメカニズムの解明を必要とするものであって，ISOにおいて特殊工程とされる溶接・接合プロセスの科学技術イノベーションと，より柔軟性のある船体建造工法の実現に繋がることから，学術・工学のどちらの面からも極めて有意義なものであると言える．また，本研究で得られる知見は，溶接に限らず，材料・熱・力学挙動が連成するプロセス一般に適用可能であり，さらには将来のそのシステム化との統合も十分に適応できることから，工学の将来の発展にも大きく寄与することが期待される．

Research Products

• [Journal Article] A Simplified Methodology for Estimating Residual Stresses in Powder-Bed Electron Beam Additive Manufacturing (2018)
  • Author(s): S. Tadano, S. Okano, T. Hino, H. Ohnishi, M. Mochizuki and Y. Nakatani
  • Journal Title: MATERIALS TRANSACTIONS Volume: 59 Issue: 3 Pages: 420-424
  • DOI: 10.2320/matertrans.M2017229
  • NAID: 130006400680
  • ISSN: 1345-9678, 1347-5320
  • Peer Reviewed
• [Journal Article] Influence of thickness of flange plate on the reduction of angular distortion by welding with trailing reverse-side flame line (2018)
  • Author(s): Y. Kotani, S. Okano, T. Tsuyama and M. Mochizuki
  • Journal Title: Welding International Volume: 32 Issue: 5 Pages: 345-352
  • DOI: 10.1080/09507116.2017.1346842
  • Peer Reviewed
• [Journal Article] Coupling Computation between Weld Mechanics and Arc Plasma Process for Residual Stress Analysis (2018)
  • Author(s): S. Okano, H. Tsui, R. Ihara and M. Mochizuki
  • Journal Title: Materials Performance and Characterization (ASTM International) Volume: 7 Issue: 4 Pages: 1-8
  • DOI: 10.1520/mpc20170089
• [Journal Article] 圧子押込み法による経年橋梁部材の機械的特性推定に関する検討 (2018)
  • Author(s): 竹内周平，岡野成威，廣畑幹人，望月正人
  • Journal Title: 鋼構造年次論文報告集 Volume: 26 Pages: 341-348
• [Journal Article] 深穴穿孔法による鋼構造柱梁接合部の準破壊的残留応力計測 (2018)
  • Author(s): 村田友宏、岡野成威、河合真二、望月正人
  • Journal Title: 鋼構造年次論文報告集 Volume: 26 Pages: 440-447
• [Journal Article] Engineering Model of Metal Active Gas Welding Process for Efficient Distortion Analysis (2017)
  • Author(s): S. Okano and M. Mochizuki
  • Journal Title: ISIJ International Volume: 57-3 Pages: 511-516
  • NAID: 130005466279
  • Peer Reviewed / Open Access
• [Journal Article] Temperature Distribution Effect on Relation Between Welding Heat Input and Angular Distortion (2017)
  • Author(s): S. Okano, H. Tsuji and M. Mochizuki
  • Journal Title: Science and Technology of Welding and Joining Volume: 22 Pages: 59-65
  • Peer Reviewed / Open Access
• [Journal Article] Application of Neural Network-Based Hardness Prediction Method to HAZ of A533B Steel Produced by Laser Temper Bead Welding (2017)
  • Author(s): L. Yu, K. Saida, S. Hirano, N. Chigusa, M. Mochizuki and K. Nishimoto
  • Journal Title: Welding in the World Volume: 61 Issue: 3 Pages: 483-498
  • DOI: 10.1007/s40194-017-0433-1
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] 表面機械加工およびその後の溶接熱加工により生じる表面加工層内部残留応力分布のX線的評価 (2017)
  • Author(s): 谷口優, 岡野成威, 望月正人
  • Journal Title: 材料 Volume: 66-7 Pages: 502-507
  • NAID: 130005815095
  • Peer Reviewed / Open Access
• [Journal Article] Dominant parameter of weld angular distortion in structural materials based on theory of inherent strain (Development of accuracy management system for high quality construction in welded structures on the basis of advanced theory of inherent strain) (2016)
  • Author(s): 望月正人, 岡野成威
  • Journal Title: Transactions of the JSME (in Japanese) Volume: 82 Issue: 835 Pages: 15-00567-15-00567
  • DOI: 10.1299/transjsme.15-00567
  • NAID: 130005140011
  • ISSN: 2187-9761
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Experimental and Numerical Investigation of Trailing Heat Sink Effect on Weld Residual Stress and Distortion of Austenitic Stainless Steel (2016)
  • Author(s): S. Okano and M. Mochizuki
  • Journal Title: ISIJ International Volume: 56 Pages: 647-653
  • NAID: 130005148459
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] 表面応力計測における圧子押込み法とX線回折法の差異について (2016)
  • Author(s): 岡野成威, 金丸大輔, 伊原涼平, 望月正人
  • Journal Title: 材料 Volume: 65 Pages: 319-324
  • NAID: 130005146432
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Assembling a database of inherent strain for simplified distortion analysis in multi-layer and multi-pass welding of heavy section plate (Development of accuracy management system for high quality construction in welded structures on the basis of advanced theory of inherent strain) (2016)
  • Author(s): 岡野成威, 只野智史, 中谷祐二郎, 望月正人
  • Journal Title: Transactions of the JSME (in Japanese) Volume: 82 Issue: 837 Pages: 16-00005-16-00005
  • DOI: 10.1299/transjsme.16-00005
  • NAID: 130005153860
  • ISSN: 2187-9761
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] 鋼溶接金属部における放射光を用いた溶接過渡応力のin-situ計測 (2016)
  • Author(s): 辻明宏, 張朔源, 橋本匡史, 岡野成威, 菖蒲敬久, 望月正人
  • Journal Title: 材料 Volume: 65 Pages: 665-671
  • NAID: 130005416081
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Dominant factors influencing weld angular distortion from a viewpoint of generation characteristics of inherent strain (Development of accuracy management system for high quality construction in welded structures on the basis of advanced theory of inherent strain) (2015)
  • Author(s): 岡野成威, 望月正人
  • Journal Title: Transactions of the JSME (in Japanese) Volume: 81 Issue: 826 Pages: 15-00118-15-00118
  • DOI: 10.1299/transjsme.15-00118
  • NAID: 130005084378
  • ISSN: 2187-9761
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Method of X-Ray Residual Stress Measurement for Phase Transformed Welds (2015)
  • Author(s): A. Tsuji, S. Okano and M. Mochizuki
  • Journal Title: Welding in the World Volume: 59 Issue: 4 Pages: 577-583
  • DOI: 10.1007/s40194-015-0232-5
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] 固有ひずみ理論に基づいた溶接角変形の支配因子と定量化 - アルミニウム合金における溶接変形・残留応力の高精度予測・評価技術に関する研究 (2015)
  • Author(s): 岡野成威, 望月正人
  • Journal Title: 軽金属溶接 Volume: 53 Pages: 402-407
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] 測定位置における無応力下での基準荷重を必要としないインデンテーション法による溶接残留応力分布の準非破壊計測 - アルミニウム合金における溶接変形・残留応力の高精度予測・評価技術に関する研究 (2015)
  • Author(s): 岡野成威, 望月正人
  • Journal Title: 軽金属溶接 Volume: 53 Pages: 408-415
  • NAID: 130005113800
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Dominant factors and quantification of Tendon Force in welded structural materials (Development of accuracy management system for high quality construction in welded structures on the basis of advanced theory of inherent strain) (2015)
  • Author(s): 岡野成威, 望月正人
  • Journal Title: Transactions of the JSME (in Japanese) Volume: 81 Issue: 830 Pages: 15-00277-15-00277
  • DOI: 10.1299/transjsme.15-00277
  • NAID: 130005105281
  • ISSN: 2187-9761
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] 溶接金属部ミクロ組織の入熱条件依存性からみたX線応力測定法の適用性評価 (2018)
  • Author(s): 徳丸大樹、岡野成威、望月正人
  • Organizer: 日本材料学会 X線材料強度部門委員会 第52回 X線材料強度に関するシンポジウム
• [Presentation] テンパービード補修溶接工法による原子力発電プラント保全技術の高度化 (2018)
  • Author(s): 望月正人、岡野成威
  • Organizer: ちゅうでんサイエンスフォーラム2018
  • Invited