A simplified method for evaluating singular stress field and fatigue strength of U-shaped notch

2020 ◽  
Vol 72 ◽  
pp. 102770 ◽  
Author(s):  
Wei Shen ◽  
Yu Qiu ◽  
RenJun Yan ◽  
Linzhi Xu ◽  
Enqian Liu
Keyword(s):  
Fatigue Strength ◽  
Stress Field ◽  
Singular Stress ◽  
Simplified Method ◽  
Singular Stress Field

Evaluation of Fatigue Strength of Butt Joint by Intensity of Singular Stress Field

2018 ◽  
Vol 940 ◽  
pp. 94-98
Author(s):  
Tatsujiro Miyazaki ◽  
Takeru Matsuda ◽  
Kaito Naka
Keyword(s):  
Fatigue Strength ◽  
Stress Field ◽  
Evaluation Method ◽  
Butt Joint ◽  
Fatigue Tests ◽  
Adhesively Bonded ◽  
Singular Stress ◽  
Rotating Bending Fatigue ◽  
Singular Stress Field ◽  
Adhesively Bonded Joint

In this study, the fatigue fracture criterion of the adhesively bonded joint is discussed. The singular stress field is formed at the interface end in the butt joint and causes the debonding fracture. The singular stress field is represented with the intensity of singular stress field (ISSF). The static debonding strength of the adhesively bonded joints is expressed with a constant value of critical ISSF. The rotating-bending fatigue tests are carried out on the butt joints of 15mm in diameter with four different adhesive thicknesses of 109 - 159μm, 209 - 265μm, 393 - 432μm and 754 - 841μm. The evaluation method by the ISSF is applied to the experimental results. It is found that the fatigue strength of the butt joint can be expressed with the constant value of critical ISSF.

Fracture toughness of silicon in nanometer-scale singular stress field

2015 ◽  
Vol 150 ◽  
pp. 161-167 ◽  
Author(s):  
Takashi Sumigawa ◽  
Shinsaku Ashida ◽  
Shuhei Tanaka ◽  
Kazunori Sanada ◽  
Takayuki Kitamura
Keyword(s):  
Fracture Toughness ◽  
Stress Field ◽  
Nanometer Scale ◽  
Singular Stress ◽  
Singular Stress Field
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