Method for constant amplitude strain controlled fatigue testing

2015 ◽  
Keyword(s):  
Fatigue Testing ◽  
Constant Amplitude

The Fatigue Properties of the M27 Higher Strength Bolt in the Grid Structure with Bolted Spherical Joints

2016 ◽  
Vol 851 ◽  
pp. 775-779
Author(s):  
Chao Zhang ◽  
Hong Gang Lei ◽  
Shao Jie Tian ◽  
Xu Yang
Keyword(s):  
Finite Element ◽  
Fatigue Failure ◽  
Fatigue Testing ◽  
Testing Machine ◽  
Fatigue Properties ◽  
Metallographic Analysis ◽  
Constant Amplitude ◽  
Grid Structure ◽  
Finite Element Software ◽  
Loading Device

Under the suspended crane loading, the key to the fatigue of the grid structure with bolt-sphere joints is the fatigue of the higher strength bolt. By now, there are not any research reports about the fatigue properties of M27 higher strength bolt at home and abroad. With the aid of the fatigue-testing machine and the loading device, this paper will have 8 constant amplitude fatigue experiments on test-piece, and will get the S-N curve of the higher strength bolt. With the aid of the metallographic analysis, this paper studies the mechanism and influencing factors of the fatigue failure; and with the aid of the finite element software ABQUAS, it analyzes and gets the stress concentration factor of the M27 higher strength bolt, and verifies the position of the fatigue failure.

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