Research on crack propagation law of rotating bending fatigue cropping process based on cusp catastrophe theory

2022 ◽  
pp. 103235
Author(s):  
Jiayi Xu ◽  
Qiang Zhou ◽  
Jishao Tao ◽  
Xudong Sun ◽  
Qing Zhao ◽  
...  
Keyword(s):  
Crack Propagation ◽  
Catastrophe Theory ◽  
Cusp Catastrophe ◽  
Bending Fatigue ◽  
Propagation Law ◽  
Rotating Bending Fatigue ◽  
Rotating Bending ◽  
Cusp Catastrophe Theory

Applied Research of Fracture for Brass in Extra-Low Cycle Inverse Rotating Bending Fatigue

2005 ◽  
Vol 297-300 ◽  
pp. 1077-1082 ◽  
Author(s):  
You Tang Li ◽  
Chang Feng Yan ◽  
Ping Ma
Keyword(s):  
Fracture Toughness ◽  
Crack Propagation ◽  
Applied Research ◽  
Special Equipment ◽  
Bending Fatigue ◽  
Cycle Times ◽  
Rotating Bending Fatigue ◽  
Rotating Bending ◽  
Tip Radius ◽  
Made In

Rotating bending and inverse rotating bending are the two different forms of fatigue. The application of regular blanking for brass under extra-low cycle inverse rotating bending fatigue was investigated. The principle of inverse rotating bending fatigue was explained at first. And then the experiment of inverse rotating bending fatigue was made in special equipment designed by the authors. Several problems, i.e. the relations of the quantities such as cycle times of fracture, the strain amplitude near the notch tip and fracture toughness of fatigue to the presetting deflection, the effects of depth and tip radius of notch on the cycle times of fracture, were discussed with the helps of experiment. Finally, The relation of depth of crack propagation to cycle times were discussed also. The suitable parameters of inverse rotating bending fatigue for blanking of brass were obtained.

Effects of an Artificial Small Defect on Torsional Fatigue Strength of Steels

1987 ◽  
Vol 109 (2) ◽  
pp. 124-129 ◽  
Author(s):  
Masahiro Endo ◽  
Yukitaka Murakami
Keyword(s):  
Fatigue Strength ◽  
Crack Propagation ◽  
Hole Diameter ◽  
Threshold Condition ◽  
Bending Fatigue ◽  
Torsional Fatigue ◽  
Small Defect ◽  
Bending Fatigue Test ◽  
Rotating Bending Fatigue ◽  
Rotating Bending

In order to elucidate the effect of small defects on the torsional fatigue strength of steels, reversed torsion tests were carried out on the 0.46 percent C steel specimens containing a small hole. The hole diameter ranges from 40 to 500μm. The fatigue behaviors on the specimen surface and near the hole were observed with the aid of a microscope. The torsional fatigue strength of steels containing small holes can be predicted from the results of rotating bending fatigue test by considering the threshold condition for crack propagation.

Experiment Research on the Influence of Fretting on Crack Propagation

2011 ◽  
Vol 228-229 ◽  
pp. 617-620 ◽  
Author(s):  
Guang Xue Yang ◽  
Qiang Li ◽  
Ji Long Xie
Keyword(s):  
Fatigue Life ◽  
Crack Propagation ◽  
Fretting Fatigue ◽  
Experimental Result ◽  
Test Machine ◽  
Bending Fatigue ◽  
Bending Fatigue Test ◽  
Rotating Bending Fatigue ◽  
Rotating Bending ◽  
Shrink Fit

In order to investigate the influence of fretting induced by a shrink-fit shaft and hub subjected to rotating bending on crack propagation on different position, small specimens consisted of shaft and hub were tested on the four point rotating bending fatigue test machine. The experimental result shows that the fretting fatigue life of specimen with notch outside the shaft-hub contact is shortest, and the fretting fatigue life of specimen with notch inside the shaft-hub contact is longest.

On a New Rotating Bending Fatigue Testing Machine

1966 ◽  
Vol 15 (148) ◽  
pp. 49-54
Author(s):  
Minoru KAWAMOTO ◽  
Katsumi SUMIHIRO ◽  
Koji KIDA
Keyword(s):  
Fatigue Testing ◽  
Testing Machine ◽  
Bending Fatigue ◽  
Rotating Bending Fatigue ◽  
Rotating Bending

A FAST ROTATING BENDING FATIGUE TEST MACHINE

2017 ◽  
Author(s):  
Marco Antonio Meggiolaro ◽  
Jaime T P Castro ◽  
Rodrigo de Moura Nogueira
Keyword(s):  
Fatigue Test ◽  
Test Machine ◽  
Bending Fatigue ◽  
Bending Fatigue Test ◽  
Rotating Bending Fatigue ◽  
Rotating Bending ◽  
Fast Rotating
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