A Study on the Relationship between Fatigue Crack Growth Behavior and Cyclic Crack Tip Opening Displacement

2006 ◽  
pp. 1051-1054
Author(s):  
Hyeon Chang Choi ◽  
Hyeon Ki Choi
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Fatigue Crack Growth Behavior ◽  
Crack Tip Opening Displacement ◽  
Opening Displacement ◽  
Crack Tip Opening ◽  
The Relationship

A Study on the Relationship between Fatigue Crack Growth Behavior and Cyclic Crack Tip Opening Displacement

2006 ◽  
Vol 326-328 ◽  
pp. 1051-1054 ◽  
Author(s):  
Hyeon Chang Choi ◽  
Hyeon Ki Choi
Keyword(s):  
Fatigue Crack ◽  
Crack Growth ◽  
Crack Tip ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Fatigue Crack Growth Behavior ◽  
Crack Tip Opening Displacement ◽  
Opening Displacement ◽  
Crack Tip Opening ◽  
The Relationship

The relationship between fatigue crack growth behavior and cyclic crack tip opening displacement is studied. An elastic-plastic finite element analysis (FEA) is performed to examine the growth behavior of fatigue crack, where the contact elements are used in the mesh of the crack tip area. We investigate the relationship between the reversed plastic zone size and the changes of the cyclic crack tip opening displacement along the crack growth. The cyclic crack tip opening displacement is related to fatigue crack opening behavior.

Dwell-fatigue crack growth mechanisms of titanium alloy Ti-6Al-4V at room-temperature

2019 ◽  
Vol 34 (01n03) ◽  
pp. 2040033
Author(s):  
Ke Wang ◽  
Xiaopeng Sun ◽  
Yongzheng Li ◽  
Pengyu Wei ◽  
Jiarui Liu ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Dwell Time ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Fatigue Crack Growth Behavior ◽  
Dwell Fatigue ◽  
Manned Submersible ◽  
The Relationship

Ti-6Al-4V alloy is widely used for the deep-sea manned submersible. In addition to the normal cyclic loading, the manned cabin will experience a period of dwell time in each cycle during their service life. In this research, the fatigue and dwell-fatigue crack growth behavior of Ti-6Al-4V alloy under different dwell time were studied experimentally. The mechanism of dwell-fatigue crack growth was investigated. The acceleration phenomenon of the dwell-fatigue crack growth can be directly observed in the experiment. The relationship between the crack length and the dwell time was captured under different [Formula: see text] within one cycle. The results presented that there is a saturation time for the dwell-fatigue crack growth. A prediction model is proposed to predict the dwell-fatigue crack growth behavior considering the effects of dwell time.

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