Investigations on fracture toughness and fracture surface energy of 3D random fibrous materials at elevated temperatures

2018 ◽  
Vol 190 ◽  
pp. 288-298 ◽  
Author(s):  
Datao Li ◽  
Wenshan Yu ◽  
Wei Xia ◽  
Qinzhi Fang ◽  
Shengping Shen
Keyword(s):  
Fracture Toughness ◽  
Fracture Surface ◽  
Surface Energy ◽  
Elevated Temperatures ◽  
Fibrous Materials ◽  
Fracture Surface Energy

Fracture toughness and fracture surface energy of sintered uranium dioxide fuel pellets

1987 ◽  
Vol 6 (3) ◽  
pp. 260-262 ◽  
Author(s):  
T. R. G. Kutty ◽  
K. N. Chandrasekharan ◽  
J. P. Panakkal ◽  
J. K. Ghosh
Keyword(s):  
Fracture Toughness ◽  
Fracture Surface ◽  
Surface Energy ◽  
Uranium Dioxide ◽  
Fracture Surface Energy ◽  
Fuel Pellets

Fracture-Surface Energy and Fracture Toughness of (U,Pu)C and (U,Pu(C,O)

1983 ◽  
Vol 66 (3) ◽  
pp. 183-188 ◽  
Author(s):  
HANSJOACHIM MATZKE ◽  
VOLKER MEYRITZ ◽  
JULES L. ROUTBORT
Keyword(s):  
Fracture Toughness ◽  
Fracture Surface ◽  
Surface Energy ◽  
Fracture Surface Energy

Laminated Microstructure and Toughness Mechanism of Abalone Shell

2012 ◽  
Vol 185 ◽  
pp. 133-135 ◽  
Author(s):  
Bin Chen ◽  
Da Gang Yin ◽  
Jian Guo Wang ◽  
Quan Yuan ◽  
Jing Hong Fan
Keyword(s):  
Fracture Toughness ◽  
Fracture Surface ◽  
Surface Energy ◽  
High Fracture Toughness ◽  
High Fracture ◽  
Fracture Surface Energy ◽  
Collagen Protein ◽  
Representative Model ◽  
Abalone Shell ◽  
Toughness Mechanism

SEM observation on an abalone shell shows that the shell is a kind of bioceramic composite consisting of inorganic aragonite sheets and organic collagen protein matter. The aragonite sheets possess long and thin shape and are divided by the collagen protein matter, which compose a kind of laminated microstructure of the shell. The fracture surface energy of the laminated microstructure is investigated and compared with non-laminated microstructure based on its representative model. It shows that the fracture surface energy of the laminated microstructure is markedly larger than that of the non-laminated microstructure and endows the shell with high fracture toughness.

scholarly journals Crack Propagation Characteristics and Fracture Surface Energy of Boride Cermets

2002 ◽  
Vol 66 (11) ◽  
pp. 1116-1121
Author(s):  
Hiromoto Kitahara ◽  
Yasuhiro Yoshikawa ◽  
Fuyuki Yoshida ◽  
Hideharu Nakashima ◽  
Kazuo Hamashima ◽  
...  
Keyword(s):  
Fracture Surface ◽  
Surface Energy ◽  
Crack Propagation ◽  
Propagation Characteristics ◽  
Fracture Surface Energy

scholarly journals Early prediction of macrocrack location in concrete, rocks and other granular composite materials

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Antoinette Tordesillas ◽  
Sanath Kahagalage ◽  
Charl Ras ◽  
Michał Nitka ◽  
Jacek Tejchman
Keyword(s):  
Fracture Surface ◽  
Surface Energy ◽  
Network Flow ◽  
Optimality Criteria ◽  
Energy Functional ◽  
Fracture Criteria ◽  
Unified Framework ◽  
Fracture Surface Energy ◽  
Energy Share ◽  
Crack Paths

AbstractHeterogeneous quasibrittle composites like concrete, ceramics and rocks comprise grains held together by bonds. The question on whether or not the path of the crack that leads to failure can be predicted from known microstructural features, viz. bond connectivity, size, fracture surface energy and strength, remains open. Many fracture criteria exist. The most widely used are based on a postulated stress and/or energy extremal. Since force and energy share common transmission paths, their flow bottleneck may be the precursory failure mechanism to reconcile these optimality criteria in one unified framework. We explore this in the framework of network flow theory, using microstructural data from 3D discrete element models of concrete under uniaxial tension. We find the force and energy bottlenecks emerge in the same path and provide an early and accurate prediction of the ultimate macrocrack path $${\mathcal {C}}$$ C . Relative to all feasible crack paths, the Griffith’s fracture surface energy and the Francfort–Marigo energy functional are minimum in $${\mathcal {C}}$$ C ; likewise for the critical strain energy density if bonds are uniformly sized. Redundancies in transmission paths govern prefailure dynamics, and predispose $${\mathcal {C}}$$ C to cascading failure during which the concomitant energy release rate and normal (Rankine) stress become maximum along $${\mathcal {C}}$$ C .

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