A uniaxial tensile behavior based fatigue crack growth model

2020 ◽  
Vol 131 ◽  
pp. 105324 ◽  
Author(s):  
S.C. Wu ◽  
C.H. Li ◽  
Y. Luo ◽  
H.O. Zhang ◽  
G.Z. Kang
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Growth Model ◽  
Tensile Behavior ◽  
Uniaxial Tensile ◽  
Behavior Based ◽  
Crack Growth Model

scholarly journals A Fatigue Crack Growth Model for Random Fiber Composites

1997 ◽  
Vol 31 (18) ◽  
pp. 1838-1855 ◽  
Author(s):  
D. R. Atodaria ◽  
S. K. Putatunda ◽  
P. K. Mallick
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Growth Model ◽  
Fiber Composites ◽  
Crack Growth Model

scholarly journals Characterization and Quantitative Analysis of Crack Precursor Size for Rubber Composites

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3442 ◽  
Author(s):  
Hao Guo ◽  
Fanzhu Li ◽  
Shipeng Wen ◽  
Haibo Yang ◽  
Liqun Zhang
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Fatigue Failure ◽  
Theoretical Formula ◽  
Uniaxial Tensile ◽  
Rubber Composites ◽  
Economic Output ◽  
Average Size ◽  
Crack Growth Model

In the field of engineering, the annual economic loss caused by material fatigue failure reaches 4% of the total economic output. The deep understanding of rubber fatigue failure can help develop and prepare rubber composites with high durability. The crack precursor sizes within the rubber composites are vital for the material mechanical and fatigue properties. In this study, we adopted three different characterization methods to analyze crack precursor sizes and their distribution. First, based on the theoretical formula of fracture mechanics, the size of the crack precursor was deduced from 180 μm to 500 μm by the uniaxial tensile experiment combined with tear test (nicked angle tear, planar tear and trouser tear). Second, by combining the uniaxial fatigue test of dumbbell specimen with the fatigue crack growth rate test, the average size of the crack precursor was calculated as 3.3 μm based on the Thomas fatigue crack growth model. Third, the average size of the crack precursor was 3.6 μm obtained by scanning electron microscope. Through theoretical calculations and experimental tests, the size and distribution of the crack precursors of rubber composites were systematically presented. This work can provide theoretical guidance for the improvement of fatigue performance of rubber composites.

Fatigue Crack Growth Model for Part-Through Flaws in Plates and Pipes

1979 ◽  
Vol 101 (1) ◽  
pp. 53-58 ◽  
Author(s):  
P. K. Nair
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Aspect Ratio ◽  
Crack Growth ◽  
Growth Model ◽  
Tensile Load ◽  
Structural Components ◽  
Pressure Loading ◽  
Axial Part ◽  
Crack Growth Model

A fatigue crack growth model is developed to evaluate the behavior of planar elliptic flaws in structural components under cyclic loadings. The model is applied to plates with cyclic tensile load and nuclear piping under cyclic pressure loading. It is found that small flaws in plates tend to grow to a fixed aspect ratio, b/a≃0.9 (b is the through thickness direction). The trend checks well with available experimental data. For an axial part-through flaw in piping there is no fixed aspect ratio for growth. However, the flaws in piping are found to grow to a definite axial length. An evaluation is made of the applicability of the model to nuclear primary piping.

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