Fretting fatigue analysis using a fracture mechanics based small crack growth prediction method

2006 ◽  
Vol 39 (10) ◽  
pp. 1166-1171 ◽  
Author(s):  
C. Giummarra ◽  
J.R. Brockenbrough
Keyword(s):  
Fracture Mechanics ◽  
Crack Growth ◽  
Prediction Method ◽  
Fretting Fatigue ◽  
Fatigue Analysis ◽  
Small Crack ◽  
Growth Prediction ◽  
Small Crack Growth

scholarly journals Simulation of fatigue small crack growth in additive manufactured Ti–6Al–4V material

2020 ◽  
Vol 32 (6) ◽  
pp. 1745-1761 ◽  
Author(s):  
A. Gupta ◽  
W. Sun ◽  
C. J. Bennett
Keyword(s):  
Cyclic Loading ◽  
Crack Growth ◽  
Prediction Method ◽  
Small Crack ◽  
Test Results ◽  
Growth Data ◽  
Growth Behaviour ◽  
Crack Growth Behaviour ◽  
Small Crack Growth ◽  
Number Of Cycles

Abstract Additive manufacturing (AM) offers design freedom and ability to fabricate parts of complex shapes which are not often possible with the conventional methods of manufacturing. In an AM part, even with optimum build parameters, a complete elimination of defects is not possible and this makes it hard to fully deploy the AM technology to build load bearing parts operating under cyclic loading conditions. Many of these defects are < 1 mm in size and are categorised as ‘small cracks’. Local interaction of cracks with microstructural features and closure effects at the wake of the crack tip are some of the factors which make the growth behaviour of small and long cracks different. A crack growth life prediction method, which effectively considers the small crack growth behaviour, has been discussed in this paper. This proposed method includes a detailed finite element-based crack growth simulation using the ANSYS SMART fracture technology. The lifing calculations utilise the modified NASGRO equation and small crack growth data which was obtained from the published long crack growth data, corrected for closure effects. The predicted stress versus number of cycles curves were compared against the fatigue test results for the AM specimens in Ti–6Al–4V material. A good correlation between the predictions and test results suggests that the proposed method can be used to assess the small crack growth life of AM parts where the fatigue effects of cyclic loading can be quite significant.

scholarly journals Fretting Fatigue Analysis Using Fracture Mechanics

1988 ◽  
Vol 31 (1) ◽  
pp. 100-107 ◽  
Author(s):  
Toshio HATTORI ◽  
Masayuki NAKAMURA ◽  
Hiroshi SAKATA ◽  
Takashi WATANABE
Keyword(s):  
Fracture Mechanics ◽  
Fretting Fatigue ◽  
Fatigue Analysis

scholarly journals Discussion of models for LCF small crack growth

2011 ◽  
Vol 10 ◽  
pp. 3642-3649 ◽  
Author(s):  
S. Beretta ◽  
S. Foletti ◽  
L. Patriarca
Keyword(s):  
Crack Growth ◽  
Small Crack ◽  
Small Crack Growth
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