Growth rate of fatigue cracks in the frame side members of the 2T�-116 locomotive

1977 ◽  
Vol 9 (5) ◽  
pp. 561-567
Author(s):  
M. E. Georgiev ◽  
V. N. Danilov ◽  
N. Ya. Mezhova ◽  
E. M. Morozov ◽  
V. B. Tskipurishvili
Keyword(s):  
Growth Rate ◽  
Fatigue Cracks

Growth rate of fatigue cracks in fields of residual stresses in titanium welded joints with different content of embrittling impurities

1990 ◽  
Vol 22 (11) ◽  
pp. 1562-1569 ◽  
Author(s):  
V. T. Troshchenko ◽  
V. V. Pokrovskii ◽  
V. L. Yarusevich ◽  
V. I. Mikhailov ◽  
V. A. Sher
Keyword(s):  
Growth Rate ◽  
Residual Stresses ◽  
Welded Joints ◽  
Fatigue Cracks ◽  
Different Content

The Growth Rate of Semi-Elliptic Fatigue Cracks in Thick-Walled Cylinders

1983 ◽  
Vol 22 ◽  
Author(s):  
W. A. Lees ◽  
P. S. J. Crofton
Keyword(s):  
Growth Rate ◽  
Crack Growth Rate ◽  
Internal Pressure ◽  
Crack Growth ◽  
Fatigue Cracks ◽  
Low Alloy Steel ◽  
Linear Elastic ◽  
Fatigue Data ◽  
Elastic Fracture ◽  
Crack Growth Rates

ABSTRACTThe rate of growth of fatigue cracks originating at the bore and at the outside surface of thick-walled low alloy steel cylinders has been measured for cylinders subjected to fluctuating internal pressure.Analysis of the results using linear elastic fracture mechanics relationships shows that crack growth rates found in air adequately predict the behaviour of cracks growing from the outside surface of a cylinder.Fatigue cracks growing from the bore of a cylinder subjected to fluctuating internal pressure are found to advance at a consistently higher rate than that predicted from crack growth rate tests carried out in air.These findings are discussed in relation to the proposed adoption of existent strain-life fatigue data for pressure vessel design.

Effect of heat treatment on the growth rate of transverse fatigue cracks in railroad rails

1991 ◽  
Vol 27 (1) ◽  
pp. 67-69
Author(s):  
M. N. Georgier ◽  
K. P. Zamula ◽  
N. Ya. Mezhova ◽  
V. A. Reikhart
Keyword(s):  
Heat Treatment ◽  
Growth Rate ◽  
Fatigue Cracks ◽  
Railroad Rails

scholarly journals Influence of microstructural discontinuities on the behaviour of long cracks in the VHCF regime for the aluminium alloys EN AW 6082 and EN AW 5083

2018 ◽  
Vol 165 ◽  
pp. 20005
Author(s):  
Tina Kirsten ◽  
Fatih Bülbül ◽  
Marcel Wicke ◽  
Hans-Jürgen Christ ◽  
Angelika Brückner-Foit ◽  
...  
Keyword(s):  
Growth Rate ◽  
Crack Growth Rate ◽  
Grain Boundaries ◽  
Crack Growth ◽  
Aluminium Alloys ◽  
Precipitation Hardening ◽  
Fatigue Cracks ◽  
In Situ Observation ◽  
Crack Growth Behaviour ◽  
Average Crack

In the present study two different aluminium alloys, the precipitation hardening alloy EN AW 6082 (peak-aged and overaged) and the work-hardening alloy EN AW 5083 (soft annealed) were examined. Fatigue cracks were initiated by means of a focused ion beam notch and a longdistance microscope was used for in-situ observation of the crack growth behaviour. The crack growth was investigated at constant stress intensity factors near the threshold regime. During the insitu investigation a change in crack growth velocity was detected. It could be observed that the barrier function of grain boundaries and primary precipitations are the major reason for crack growth retardation despite the fact that the crack is in the long crack growth range. The microstructural influence becomes more important with decreasing ΔK values, meanwhile the average crack growth rate decreases simultaneously. Experimental results have shown that the Febased precipitates are influencing the crack growth rate for both aluminium alloys. Meanwhile, grain boundaries are causing a deceleration of the crack growth rate primarily in case of the work hardened aluminium alloy. This is assumed to be the reason for the smaller average crack growth rate in EN AW 5083 compared to that observed for the precipitation hardening alloy while applying comparable ΔK values.

Fracture-mechanics analysis of fatigue-crack propagation in polymethylmethacrylate

1968 ◽  
Vol 3 (3) ◽  
pp. 193-199 ◽  
Author(s):  
H F Borduas ◽  
L E Culver ◽  
D J Burns
Keyword(s):  
Growth Rate ◽  
Stress Intensity Factor ◽  
Fatigue Crack ◽  
Stress Intensity ◽  
Crack Growth Rate ◽  
Fatigue Cracks ◽  
Specimen Thickness ◽  
Loading History ◽  
Tension Tests ◽  
Mechanics Analysis

Repeated tension tests on centre-notched sheet specimens show that the rate of growth of fatigue cracks in polymethylmethacrylate is constant if the range of crack-tip stress-intensity factor is constant. Within the limits considered fatigue-crack growth rate was independent of specimen thickness and loading history.

Methodical approach for studying kinetics of short and long fatigue cracks growth for irradiated reactor materials. Part 1. Statement of problem. The effect of the initial notch acuity on the fatigue crack rate on small-sized specimens

2019 ◽  
pp. 191-204 ◽  
Author(s):  
V. I. Smirnov ◽  
A. J. Minkin ◽  
B. Z. Margolin ◽  
V. I. Kokhonov
Keyword(s):  
Growth Rate ◽  
Fatigue Crack ◽  
Crack Growth ◽  
Growth Kinetics ◽  
Fatigue Cracks ◽  
Stress Concentration Zone ◽  
Concentration Zone ◽  
Methodical Approach ◽  
Reactor Materials ◽  
Kinetics Of

The paper considers methodical issues in the experimental research of fatigue crack growth kinetics when testing irradiated small-sized specimens. The effect of the initial notch acuity is studied on the long crack growth rate. The stress concentration zone sizes are estimated for notches of various types. A brif literature review of the main problems in the study of the growth kinetics of short fatigue cracks has been performed. The tasks of further research are formulated. 

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