Numerical study on size effect of ring specimen under Brazilian test

2008 ◽  
pp. 121-126 ◽  
Author(s):  
K Liu ◽  
B Liu ◽  
W Liu
2016 ◽  
Vol 49 (10) ◽  
pp. 4029-4048 ◽  
Author(s):  
H. Samouh ◽  
A. Soive ◽  
E. Rozière ◽  
A. Loukili

2018 ◽  
Vol 14 (5) ◽  
pp. 560-569 ◽  
Author(s):  
Jun Feng ◽  
Wei-wei Sun ◽  
Bao-ming Li
Keyword(s):  

2019 ◽  
Vol 132 ◽  
pp. 103318 ◽  
Author(s):  
Liu Jin ◽  
Wenxuan Yu ◽  
Xiuli Du ◽  
Wangxian Yang
Keyword(s):  

2021 ◽  
Author(s):  
Mehdi Serati

<p>An important issue in rapid brittle fracture is the limiting speed of crack propagation. It is widely believed that brittle mode I crack cannot propagate faster than the Rayleigh wave speed, or the speed of sound on a solid surface. Mode II cracks are also limited by longitudinal speed wave. The origin for this belief stems from the predictions of continuum mechanics. Once the crack speed reaches a theoretical upper limit in a material, which is most often larger than one fifth of the Rayleigh wave velocity, branching of a propagating crack occurs. To verify this hypothesis, this paper presents the results of an experimental program aimed at disclosing the size effect on the crack velocity in the Splitting Tensile Strength indirect test (i.e. the Brazilian Test) using high-speed photography techniques. Over 100 Brazilian tests with more than 10 different rock types at various diameters were prepared and tested according to the ASTM standard recommendations using either a servo hydraulic machine or an electromechanical load frame at a wide ranges of load/displacement rates. By adopting a high frame rate of above 100,000 frames per second (fps), crack initiation, propagation, and coalescence were captured to study the size effect on the crack speed and failure mode on the Brazilian test results.</p>


2017 ◽  
Vol 126 ◽  
pp. 393-399 ◽  
Author(s):  
Filip Siska ◽  
Tingting Guo ◽  
Ludek Stratil ◽  
Jan Cizek ◽  
Matthew Barnett

2010 ◽  
Vol 51 (5) ◽  
pp. 959-968 ◽  
Author(s):  
Xiao-Dong Wang ◽  
Wei-Mon Yan ◽  
Yuan-Yuan Duan ◽  
Fang-Bor Weng ◽  
Guo-Bin Jung ◽  
...  

2011 ◽  
Vol 21 (12) ◽  
pp. 2551-2574 ◽  
Author(s):  
YIJIANG LIAN ◽  
ZHIPING LI

An iso-parametric finite element method is introduced in this paper to study cavitations and configurational forces in nonlinear elasticity. The method is shown to be highly efficient in capturing the cavitation phenomenon, especially in dealing with multiple cavities of various sizes and shapes. Our numerical experiments verified and extended, for a class of nonlinear elasticity materials, the theory of Sivaloganathan and Spector on the configurational forces of cavities, as well as justified a crucial hypothesis of the theory on the cavities. Numerical experiments on configurational forces indicate that, in the case of a round reference configuration with radially symmetric stretch on the boundary, the cavitation centered at the origin is the unique energy minimizer. Numerical experiments also reveal an interesting size effect phenomenon: for macro-scale pre-existing-defects, the cavitation process is dominated by the relatively larger pre-existing-defects, and the cavitation tendency of much smaller pre-existing-defects is significantly suppressed.


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