Influence of the load ratio on the subcritical crack propagation in alumina under cyclic compressive loads

1990 ◽  
Vol 9 (8) ◽  
pp. 964-966 ◽  
Author(s):  
J. M. Sabadell ◽  
M. Anglada
Keyword(s):  
Crack Propagation ◽  
Load Ratio ◽  
Subcritical Crack Propagation ◽  
Compressive Loads

Detection of subcritical crack propagation for concrete dams

2009 ◽  
Vol 52 (12) ◽  
pp. 3654-3660 ◽  
Author(s):  
TengFei Bao ◽  
Hong Yu
Keyword(s):  
Crack Propagation ◽  
Concrete Dams ◽  
Subcritical Crack Propagation

Numerical Study on Progressive Failure of the Marble Plate Based on the Thin-Layer Tri-Node Jointed Element

2011 ◽  
Vol 255-260 ◽  
pp. 1867-1872
Author(s):  
Jing Hua Qi ◽  
Zhen Nan Zhang ◽  
Xiu Run Ge
Keyword(s):  
Crack Propagation ◽  
Thin Layer ◽  
Numerical Study ◽  
Progressive Failure ◽  
Triangular Element ◽  
Compressive Loads ◽  
Joint Element ◽  
The Common ◽  
Edge Cracks ◽  
Good Agreement

In order to model the mechanical behavior of joints efficiently, a thin-layer tri-node joint element is constructed. The stiffness matrix of the element is derived in the paper. For it shares the common nodes with the original tri-node triangle element, the tri-node joint element can be applied to model the crack propagation without remeshing or mesh adjustment. Another advantage is that the cracked body is meshed without consideration of its geometry integrity and existence of the joints or pre-existed crack in the procedure of mesh generation, and then the triangular element intersected by the crack or joint is automatically transformed into the tri-node joint element to represent pre-existed cracks. These make the numerical simulation of crack propagation highly convenient and efficient. After CZM is chosen to model the crack tip, the mixed- energy simple criterion is used to determine whether the element is intersected by the extended crack or not, the extended crack is located in the model. By modeling the marble plates with two edge cracks subjected to the uniaxial compressive loads, it is shown that the numerical results are in good agreement with the experimental results, which suggests that the present method is valid and feasible in modeling rock crack propagation.

Influence of Stress Parallel to Crack Plan on Subcritical Crack Propagation in Glass under Biaxial Stress

2005 ◽  
pp. 1071-1076
Author(s):  
Wei Hong Li ◽  
Li Jiu Wang ◽  
Chun An Tang ◽  
Yi Wang Bao ◽  
Xiong Chen ◽  
...  
Keyword(s):  
Crack Propagation ◽  
Biaxial Stress ◽  
Subcritical Crack Propagation

Fatigue of Self-Healing Nanofiber-based Composites: Static Test and Subcritical Crack Propagation

2016 ◽  
Vol 8 (28) ◽  
pp. 18462-18470 ◽  
Author(s):  
Min Wook Lee ◽  
Soumyadip Sett ◽  
Sam S. Yoon ◽  
Alexander L. Yarin
Keyword(s):  
Crack Propagation ◽  
Self Healing ◽  
Static Test ◽  
Subcritical Crack Propagation

50-Fold Difference in Region-II Fatigue Crack Propagation Resistance of Titanium Alloys: A Grain-Size Effect

1979 ◽  
Vol 101 (1) ◽  
pp. 86-90 ◽  
Author(s):  
G. R. Yoder ◽  
L. A. Cooley ◽  
T. W. Crooker
Keyword(s):  
Grain Size ◽  
Fatigue Crack ◽  
Crack Propagation ◽  
Crack Growth ◽  
Fatigue Crack Propagation ◽  
Load Ratio ◽  
Plastic Zone Size ◽  
Crack Propagation Resistance ◽  
Order Of Magnitude ◽  
Region Ii

Fatigue crack growth rates (da/dN) in ambient laboratory air have been determined for a wide variety of materials from four basic α + β titanium alloy systems. Each material was cyclically loaded with a haversine waveform and a load ratio, R = 0.10. The results indicate that, at a constant value of stress-intensity range (ΔK), the width of the da/dN data band exceeds an order of magnitude. For example, at ΔK = 21 MPa·m1/2, a 50-fold difference in fatigue crack propagation rates is observed. Analysis of the crack growth rate data at this point indicates a systematic dependence on grain size (l), viz. that da/dN decreases with increasing l. An interpretation of this effect is offered in terms of reversed (cyclic) plastic zone size considerations.

1249 Effect of Load Ratio on Fatigue Lives and Crack Propagation Behavior of the Extruded Magnesium Alloy

2008 ◽  
Vol 2008.1 (0) ◽  
pp. 173-174
Author(s):  
Sotomi Ishihara ◽  
Masanori Sato ◽  
Ken Taniguchi ◽  
Takahito Goshima
Keyword(s):  
Magnesium Alloy ◽  
Crack Propagation ◽  
Load Ratio ◽  
Propagation Behavior ◽  
Crack Propagation Behavior
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