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Dive into the research topics where Masami Wakita is active.

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Featured researches published by Masami Wakita.


Archive | 2006

Resistance-Curve Method for Predicting Fatigue Thresholds under Combined Loading

Keisuke Tanaka; Yoshiaki Akiniwa; Masami Wakita

The fatigue threshold of materials with small defects or sharp notches is not controlled by the nucleation of fatigue cracks, but by its propagation. After nucleation, the fatigue crack first decelerates and then stops when the applied stress amplitude is below the fatigue threshold. Tanaka et al have shown that the development of crack closure with crack extension is primarily responsible for crack deceleration and stoppage. They have proposed the R-curve method for predicting the fatigue thresholds of notched components and have shown a good agreement with the experimental results for uniaxial loading cases. In this paper, this method is applied to the fatigue thresholds under combined loading.


International Journal of Fatigue | 2008

Fatigue strength of spring steel under axial and torsional loading in the very high cycle regime

Yoshiaki Akiniwa; Stefanie E. Stanzl-Tschegg; H. Mayer; Masami Wakita; Keiji Tanaka


Archive | 2007

Cold-formed spring having high fatigue strength and high corrosion fatigue strength, steel for such spring, and method of manufacturing such spring

Hidetoshi Yoshikawa; Takayuki Sakakibara; Masami Wakita


Archive | 2011

SPRING HAVING EXCELLENT CORROSION FATIGUE STRENGTH

Takanori Kuno; Masami Wakita


Archive | 2010

Spring steel and spring having superior corrosion fatigue strength

Takanori Kuno; Tomohiro Nakano; Takayuki Sakakibara; Masami Wakita; Shingo Mimura


Archive | 2010

Spring with high durability and method of coating the same

Yasuhiko Kunita; Takayuki Sakakibara; Masami Wakita; Yuichi Kondo; Norio Sawatari


Transactions of Japan Society of Spring Engineers | 2007

Study on Predicting Formula for Torsional Fatigue Strength of Spring Steel-Effect of Environment, Notch and Hardness-

Masami Wakita; Takanori Kuno; Akihiko Nemoto; Katsushi Saruki; Keisuke Tanaka


Journal of The Society of Materials Science, Japan | 2007

Effects of Artificial Small Defect and Corrosive Environment on Torsional Fatigue Strength of High Strength Spring Steel

Masami Wakita; Takanori Kuno; Akihiko Nemoto; Katsushi Saruki; Keisuke Tanaka


journal of the Japan Society for Testing Materials | 2008

Effect of Shot Peening on Torsional Fatigue Strength of High Strength Spring Steel in Air and Corrosive Environments

Masami Wakita; Takanori Kuno; Tomoya Hasegawa; Katsushi Saruki; Keisuke Tanaka


Archive | 2008

Steel for spring excellent in hydrogen embrittlement resistance and corrosion fatigue strength and high strength spring part using the same

Takayuki Sakakibara; Atsushi Sugimoto; Masami Wakita; Hidetoshi Yoshikawa; 英利 吉川; 淳 杉本; 隆之 榊原; 将見 脇田

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Yoshiaki Akiniwa

Yokohama National University

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Akira Ueno

Toyota Technological Institute

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