scholarly journals An Experimental Study on the Torsional Fatigue Strength of Hollow Specimens with Drill Holes

1967 ◽  
Vol 16 (160) ◽  
pp. 15-20
Author(s):  
Satoshi NISHIJIMA
Keyword(s):  
Experimental Study ◽  
Fatigue Strength ◽  
Torsional Fatigue ◽  
Drill Holes

scholarly journals Torsional Fatigue Strength of Semi-Built Type Crankshaft

1965 ◽  
Vol 31 (232) ◽  
pp. 1812-1817 ◽  
Author(s):  
Isao SAKAMOTO ◽  
Mitsuhiro KINUGAWA
Keyword(s):  
Fatigue Strength ◽  
Torsional Fatigue

Vehicle Driving Axle Half Shaft Fracture Analysis

2014 ◽  
Vol 912-914 ◽  
pp. 658-661
Author(s):  
Jun Jie Wang
Keyword(s):  
Electron Microscope ◽  
Fatigue Strength ◽  
Shaft Fracture ◽  
Fracture Analysis ◽  
Optical Microscope ◽  
Automobile Driving ◽  
Quenching Temperature ◽  
Torsional Fatigue ◽  
Conditioning Treatment ◽  
Scanning Electron

by using optical microscope and scanning electron microscope (sem), for minitype automobile driving axle half shaft fracture piece of organization and the fracture characteristic is analyzed and the results show that the axle shaft of conditioning treatment in the quenching temperature high enough, make its surface and center organization exists in the group more ferrite, caused the artifacts of the final hardness and fatigue strength is insufficient, led to the use of half shaft torsional fatigue fracture.

scholarly journals Effect of Upset Burr on Torsional Fatigue Strength of Friction Welded Carbon Steel Joints

2001 ◽  
Vol 50 (9Appendix) ◽  
pp. 166-171
Author(s):  
Yoshiaki YAMAMOTO ◽  
Takashi KISHIMOTO ◽  
Hiizu OCHI ◽  
Koichi OGAWA ◽  
Hiroshi YAMAGUCHI ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Carbon Steel ◽  
Torsional Fatigue ◽  
Steel Joints

A Unified Method for the Prediction of the Fatigue Strength of Small-Hole-Containing Components under Combined Loading

2005 ◽  
Vol 297-300 ◽  
pp. 1929-1938
Author(s):  
Isao Ishimoto ◽  
Masahiro Endo
Keyword(s):  
Fatigue Strength ◽  
Fatigue Loading ◽  
Threshold Level ◽  
Multiaxial Fatigue ◽  
Small Hole ◽  
Combined Loading ◽  
Mode I ◽  
Threshold Condition ◽  
Torsional Fatigue ◽  
Unified Method

A unified method is presented for the prediction of the fatigue strength of steel components containing small holes and being subjected to combined loading. Materials investigated were an annealed 0.37% carbon steel and a quenched and tempered Cr-Mo steel. Combined axial and torsional fatigue loading tests were carried out using specimens containing a small hole, which was introduced into the surface by drilling. The diameter of holes equaled the depth and was either 100µm or 500µm. The non-propagating cracks emanating in the radial direction from the holes were observed at the fatigue limit. When the loading condition is the same, they were on a plane that inclined at the same angle with respect to the specimen axis, regardless of the size of holes. This result suggested that the fatigue strength would be controlled by the Mode I threshold condition for propagation of a crack initiated on a critical plane. A criterion connecting uniaxial fatigue strength with multiaxial fatigue strength was proposed based upon the assumption that at the threshold level, the variation of the stress intensity factor of a Mode I crack initiated under combined loading equaled that under uniaxial loading. The predictive method proposed based upon this criterion is practical in that no fatigue test is necessary in making predictions. For the various conditions of in-phase and out-of-phase fatigue loadings with an imposed mean or static load, experimental results agreed well with predictions.

Torsional Fatigue of 63Sn-37Pb and Sn-0.7Cu Solders

2007 ◽  
Vol 353-358 ◽  
pp. 2908-2911
Author(s):  
Ning Bai ◽  
Xu Chen ◽  
Xin Li
Keyword(s):  
Steady State ◽  
Fatigue Strength ◽  
Fatigue Behavior ◽  
Equivalent Strain ◽  
Fatigue Tests ◽  
Load Drop ◽  
Torsional Fatigue ◽  
Von Mises ◽  
Fatigue Criterion ◽  
Better Than

A series of torsional fatigue tests were conducted on 63Sn-37Pb and Sn-0.7Cu solders. A continuous load drop was observed during the test. It was found that the load drop percentage had little effect on the elastic strain-life curve but strong effect on the plastic strain-life curve. The fatigue strength coefficient, fatigue strength exponent and fatigue ductility exponent had no great changes with the load drop. However, fatigue ductility coefficient showed a great difference and was linearly varying with load drop. A fatigue criterion of Coffin-Manson type was proposed in relation to load drop. The descending curve of the stress range with cycle was observed to consist of transient, steady state and tertiary regions. The percentage of load drop corresponding to the turning point from the steady state to the tertiary region was about 25% for all strain ranges of 63Sn-37Pb, and 30% for all strain ranges of Sn-0.7Cu. The torsional fatigue lives were correlated with von Mises equivalent strain amplitudes well. The fatigue behavior of Sn-0.7Cu is better than that of 63Sn-37Pb.

scholarly journals An Experimental Study for the Fatigue Strength Assessment of Longi-web Connections

2008 ◽  
Vol 45 (1) ◽  
pp. 87-92 ◽  
Author(s):  
Sung-Won Kang ◽  
Jeong-Hwan Kim ◽  
Kwang-Seok Kim ◽  
Joong-Kyoo Kang ◽  
Joo-Ho Heo ◽  
...  
Keyword(s):  
Experimental Study ◽  
Fatigue Strength ◽  
Strength Assessment ◽  
Fatigue Strength Assessment
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