A FATIGUE LIFE PREDICTION METHOD BASED ON A MESOSCOPIC APPROACH IN CONSTANT AMPLITUDE MULTIAXIAL LOADING

1998 ◽  
Vol 21 (3) ◽  
pp. 241-256 ◽  
Author(s):  
F Morel
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Prediction Method ◽  
Fatigue Life Prediction ◽  
Multiaxial Loading ◽  
Constant Amplitude

scholarly journals Fatigue life prediction for broad-band multiaxial loading with various PSD curve shapes

2012 ◽  
Vol 44 ◽  
pp. 74-88 ◽  
Author(s):  
Adam Niesłony ◽  
Milan Růžička ◽  
Jan Papuga ◽  
Aleš Hodr ◽  
Miroslav Balda ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Broad Band ◽  
Fatigue Life Prediction ◽  
Multiaxial Loading

Fatigue Life Prediction of Buckling String with Cracks in Horizontal Wells of Mining Engineering

2012 ◽  
Vol 577 ◽  
pp. 127-131 ◽  
Author(s):  
Peng Wang ◽  
Tie Yan ◽  
Xue Liang Bi ◽  
Shi Hui Sun
Keyword(s):  
Fatigue Life ◽  
Prediction Model ◽  
Life Prediction ◽  
Horizontal Well ◽  
Drill Pipe ◽  
Prediction Method ◽  
Drill String ◽  
Fatigue Life Prediction ◽  
Mining Engineering ◽  
Life Prediction Model

Fatigue damage in the rotating drill pipe in the horizontal well of mining engineering is usually resulted from cyclic bending stresses caused by the rotation of the pipe especially when it is passing through curved sections or horizontal sections. This paper studies fatigue life prediction method of rotating drill pipe which is considering initial crack in horizontal well of mining engineering. Forman fatigue life prediction model which considering stress ratio is used to predict drill string fatigue life and the corresponding software has been written. The program can be used to calculate the stress of down hole assembly, can predict stress and alternating load in the process of rotating-on bottom. Therefore, establishing buckling string fatigue life prediction model with cracks can be a good reference to both operation and monitor of the drill pipe for mining engineering.

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