scholarly journals Critical plane approach to multiaxial variable amplitude fatigue loading

2015 ◽  
Vol 9 (33) ◽  
pp. 345-356 ◽  
Author(s):  
Yingyu Wang ◽  
Luca Susmel
Keyword(s):  
Fatigue Loading ◽  
Critical Plane ◽  
Variable Amplitude ◽  
Critical Plane Approach ◽  
Variable Amplitude Fatigue

Constraint corrected cycle-by-cycle analysis of crack growth retardation under variable amplitude fatigue loading

2019 ◽  
Vol 125 ◽  
pp. 199-209 ◽  
Author(s):  
Jie Zhang ◽  
Louis Muys ◽  
Steven De Tender ◽  
Nahuel Micone ◽  
Stijn Hertelé ◽  
...  
Keyword(s):  
Crack Growth ◽  
Growth Retardation ◽  
Fatigue Loading ◽  
Variable Amplitude ◽  
Variable Amplitude Fatigue ◽  
Crack Growth Retardation

Fractographic Study on the Use of Rainflow Counting for Small and Long Cracks in AA7050

2014 ◽  
Vol 891-892 ◽  
pp. 687-692 ◽  
Author(s):  
Paul White ◽  
David S. Mongru
Keyword(s):  
Crack Growth ◽  
Fatigue Loading ◽  
Variable Amplitude Loading ◽  
Variable Amplitude ◽  
Counting Technique ◽  
Rainflow Cycle Counting ◽  
Small Cracks ◽  
The Individual ◽  
Rainflow Counting ◽  
Variable Amplitude Fatigue

Using ada/dNequation to predict fatigue crack growth for a variable amplitude loading sequence, requires converting the sequence into an equivalent series of constant amplitude cycles, which is sometimes achieved using the rainflow cycle counting technique. Rainflow counting views small intermediate cycles as an interruption to a larger cycle, in effect, the crack tip remembers the state of the larger cycle. This has been shown to be an effective technique in predicting fatigue growth rates for long cracks, but has not been extensively investigated for use in predicting the growth of small cracks. An investigation was made into the applicability of rainflow cycle counting for predicting the crack growth of small and long cracks created with variable amplitude fatigue loading in AA7050-T7451 plate, a common modern aircraft material. A series of coupons were tested with a number of different variable amplitude loading sequences which had distinct marker bands inserted to separate the individual segments of loading and enable them to be identified fractographically. For the sequences examined, which covered varying numbers of interrupted cycles and a staircase of three steps, the baseline and the rainflow loading segments within each sequence showed effectively the same rate of growth for the same stress intensity range in both the small and long crack coupons, demonstrating that rainflow cycle counting was a suitable cycle counting technique for both small and long cracks.

Running Damage Extraction (RDE) Technique on the Segmentation of Variable Amplitude Fatigue Loading Data

2012 ◽  
Vol 15 (1) ◽  
pp. 43-47
Author(s):  
Zulkifli Mohd Nopiah ◽  
Mohd Noor Baharin ◽  
Shahrum Abdullah ◽  
Muhammad Ihsan Khairir ◽  
Lennie Abdullah
Keyword(s):  
Fatigue Loading ◽  
Variable Amplitude ◽  
Variable Amplitude Fatigue
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