Fracture characteristics of ceramic materials during thermal impact loading

1977 ◽  
Vol 9 (7) ◽  
pp. 877-882
Author(s):  
G. A. Gogotsi ◽  
L. P. Primak ◽  
V. A. Stepanenko ◽  
A. I. Zakharov
Keyword(s):  
Impact Loading ◽  
Ceramic Materials ◽  
Thermal Impact ◽  
Fracture Characteristics

scholarly journals Impact Fracture of Composite and Homogeneous Nanoagglomerates

2008 ◽  
Vol 2008 ◽  
pp. 1-7 ◽  
Author(s):  
S. J. Antony ◽  
R. Moreno-Atanasio ◽  
J. Musadaidzwa ◽  
R. A. Williams
Keyword(s):  
Kinetic Energy ◽  
Impact Loading ◽  
Fracture Behaviour ◽  
Time Lag ◽  
Impact Fracture ◽  
Initial Kinetic Energy ◽  
Normal Impact ◽  
Fracture Characteristics ◽  
Hard Shell ◽  
The Moment

It is not yet clear on whether the fracture characteristics of structured composite capsules and homogeneous nanoagglomerates differ significantly under impact loading conditions. Experimental measurement of impact fracture properties of such small agglomerates is difficult, due to the length and time scales associated with this problem. Using computer simulations, here we show that nanoagglomerates are subjected to normal impact loading fracture within a few nanoseconds in a brittle manner. The restitution coefficient of the nanoagglomerates varies nonlinearly with initial kinetic energy. The fracture of nanoagglomerates does not always happen at the moment when they experience the maximum wall force, but occurs after a time lag of a few nanoseconds as characterised by impact survival time (IST) and IST index. IST is dependant on the initial kinetic energy, mechanical and geometric properties of the nanoagglomerates. For identical geometries of the capsules, IST index is higher for capsules with a soft shell than for these with a hard shell, an indication of the enhanced ability of the soft nanocapsules to dissipate impact energy. The DEM simulations reported here based on theories of contact mechanics provide fundamental insights on the fracture behaviour of agglomerates—at nanoscale, the structure of the agglomerates significantly influences their breakage behaviour.

Strain gauge experimental study on mode I rock fracture characteristics under impact loading

2021 ◽  
pp. 107858
Author(s):  
Qing Li ◽  
Chen Huang ◽  
Zhenghua Gao ◽  
Kai Wang ◽  
Wenlong Xu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Strain Gauge ◽  
Impact Loading ◽  
Rock Fracture ◽  
Mode I ◽  
Fracture Characteristics

Fracture characteristics of concrete subjected to impact loading

2010 ◽  
Vol 53 (2) ◽  
pp. 253-261 ◽  
Author(s):  
HaiFeng Liu ◽  
HaiYan Liu ◽  
WeiDong Song
Keyword(s):  
Impact Loading ◽  
Fracture Characteristics
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