Rchr
J-GLOBAL ID：200901067504099100
Update date: May. 22, 2024
Niwa Toshio
ニワ トシオ | Niwa Toshio
Affiliation and department：
Job title：
Designated Principal Research
Research field (1)：
Marine and maritime engineering
Research keywords (4)：
Fracture Mechanics
, Mechanics of Materials
, Corrision
, Fatigue Strength
Research theme for competitive and other funds (19)：
- 2016 - 2020 Effect of stress ratio on fatigue strength and thickness effect of weided joint improved by HFMI
- 2016 - 2019 Improvement of Fatigue Strength by Laser Irradiation in the Hull Construction
- 2014 - 2018 Noble estimation procedure of fatigue crack growth under in-plane biaxial or superimposed stress conditions
- 2012 - 2015 Development of optimum treatment method in the fatigue strength improvement
- 2012 - 2015 A fundamental study on fatigue life evaluation taking the load sequence of whipping into account.
- 2009 - 2013 Improvement of the Fatigue Life Estimation for Large Welded Built-up Structures Based on the Estimation of Fatigue Crack Growth Histories
- 2010 - 2012 Development of thermal spray coatings with long-term corrosion protection and anti-biofouling properties for steel structures in the sea
- 2009 - 2011 Development of a monitoring method for fatigue damage using piezoelectric element
- 2007 - 2008 バラストタンクのヘルスモニタリング技術に関する基礎的研究
- 2001 - 2003 Numerical simulation of fatigue crack growth in steel structures
- 2002 - 2002 長距離海底用等天然ガスパイプラインの安全性評価指針確立に関する研究
- 1999 - 2001 Improvement of the estimation method caused by welding in hull built-up stages
- 1999 - 2000 変動荷重下における疲労寿命推定法に関する研究
- 1997 - 1998 Study on Fatigue life priduction of microstructural short crack region
- 1996 - 1998 Study on crack opening/closing behavior of fatigue surface crack and fatigue life priduction
- 1994 - 1996 Fatigue crack propagation under various kind of loading
- 1991 - 1992 Assessment method of COD for a surface flaw at a structural discontinuity
- 1990 - 1992 Study on theoretical assessment method of K_<th> and assessment method of fatigue life for a short crack
- 1988 - 1990 Assessment Method for the Effect of Strain Rate on Fracture Toughness
Show all
Papers (41)：
-
Shuichi Tsumura, Toshiaki Iwata, Toshio Niwa. Thickness effect on fatigue life of HFMI-treated welded joints under negative stress ratio. WELDING IN THE WORLD. 2023. 67. 9. 2261-2272
-
Hitoshi Hayashibara, Ryutaro Fueki, Norio Yamamoto, Tomohiro Sugimoto, Takahiro Ando, Shuichi Tsumura, Yosuke Anai, Chikahisa Murakami, Toshio Niwa, Toshiaki Iwata, et al. Surface Corrosion Fatigue Crack Growth Test in Accelerating Environment Where General Surface Corrosion Proceed in Parallel. Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems. 2023
-
Shuichi Tsumura, Yosuke Anai, Takahiro Ando, Toshiaki Iwata, Toshio Niwa. Improvement Effect of Fatigue Strength by HFMI Treatment under the Negative Stress Ratio Condition. Journal of the Japan Society of Naval Architects and Ocean Engineers. 2021. 34. 51-61
-
Yosuke Anai, Yoshihisa Tanaka, Toshio Niwa. Corrosion Fatigue Properties of High Tensile Steel Plates (YP40 steel) for a Ship Hull. Journal of Marine Science and Technology. 2020. 32. 109-115
-
M. Morishita, K. Gotoh, Y. Anai, S. Tsumura, T. Niwa. Fatigue surface crack growth behaviour in a flat plate and an out-of-plane gusset welded joints under biaxial cyclic loadings with different phases. Journal of Marine Science and Technology. 2020. 26. 1-18
ｍore...
MISC (42)：
Books (1)：
-
Fatigue Life Prediction for Steel Structures
Kyoritsu Shuppan Co., Ltd.. 2001
Lectures and oral presentations (14)：
-
A Study on Effect of Improvement in Fatigue Strength and the Thickness Effect by HFMI Treatment under Negative Stress Ratio Condition
(Conference Proceedings, The Japan Society of Naval Architects and Ocean Engineers 2020)
-
A Study on Effect of Improvement in Fatigue Strength Effect by HFMI Treatment under Negative Stress Ratio Condition
(Conference Proceedings, The Japan Society of Naval Architects and Ocean Engineers 2019)
-
Numerical Simulation of Fatigue Surface Crack Propagation under in-plane Biaxial Cyclic Loading with Different Phases
(Conference Proceedings, The Japan Society of Naval Architects and Ocean Engineers 2018)
-
Shape Evolution of Fatigue Surface Crack under In-plain Biaxial Cyclic Loading
(Conference Proceedings, The Japan Society of Naval Architects and Ocean Engineers 2017)
-
Thickness Effect on Fatigue Strength of Welded Joint Improved by UIT
(The National Meeting of JWS 2017)
ｍore...
Education (2)：
- 1984 - 1986 Nagaoka University of Technology Graduate School of Engineering Mechanical System Engineering Division
- 1982 - 1984 Nagaoka University of Technology Faculty of Engineering Mechanical Design and Production Engineering Department
Professional career (2)：
- Doctor(Engineering) (Kyushu University)
- Master of Engineering (Nagaoka University of Technology)
Work history (10)：
- 2022/04 - 現在 National Maritime Research Institute Designated Principal Researcher
- 2019/07 - 2022/03 National Maritime Research Institute Industrial System Engineering Department Director
- 2018/04 - 2022/03 National Maritime Research Institute Senior Director for Research
- 2016/04 - 2019/07 National Maritime Research Institute Core Manufacturing Technology Department Director
- 2009/08 - 2019/07 National Maritime Research Institute Head of Research Group
- 2006/04 - 2009/08 National Maritime Research Institute Senior Researcher
- 2002/04 - 2006/03 National Maritime Research Institute Chief Researcher
- 1998/10 - 2001/03 Kyushu University Graduate School of Engineering lecturer
- 1988/04 - 1998/09 Kyushu University School of Engineering Research Assosiate
- 1986/04 - 1988/03 Mitsubishi Motors Corpration
Show all
Awards (1)：
- 2014/06 - OMAE2013 Best Paper Award Material Technology Symposium Fatigue crack propagation under biaxial tensile loading -Effect of the phase difference on biaxial loading-
Association Membership(s) (3)：
The Society of Materials Science, Japan
, Japan Welding Sciety
, The Japan Society of Naval Architects and Ocean Engineering
