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

scholarly journals Modeling of Hydraulic Fracture of Concrete Gravity Dams by Stress-Seepage-Damage Coupling Model

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Sha Sha ◽  
Guoxin Zhang
Keyword(s):  
Finite Element ◽  
Crack Propagation ◽  
Hydraulic Fracture ◽  
Carrying Capacity ◽  
Damage Model ◽  
Coupling Model ◽  
Propagation Path ◽  
Concrete Dams ◽  
Gravity Dams ◽  
Concrete Gravity Dams

High-pressure hydraulic fracture (HF) is an important part of the safety assessment of high concrete dams. A stress-seepage-damage coupling model based on the finite element method is presented and first applied in HF in concrete dams. The coupling model has the following characteristics: (1) the strain softening behavior of fracture process zone in concrete is considered; (2) the mesh-dependent hardening technique is adopted so that the fracture energy dissipation is not affected by the finite element mesh size; (3) four coupling processes during hydraulic fracture are considered. By the damage model, the crack propagation processes of a 1 : 40 scaled model dam and Koyna dam are simulated. The results are in agreement with experimental and other numerical results, indicating that the damage model can effectively predict the carrying capacity and the crack trajectory of concrete gravity dams. Subsequently, the crack propagation processes of Koyna dam using three notches of different initial lengths are simulated by the damage model and the coupling model. And the influence of HF on the crack propagation path and carrying capacity is studied. The results reveal that HF has a significant influence on the global response of the dam.

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

Subcritical crack propagation under cyclic and static loading in mullite and mullite-zirconia

1998 ◽  
Vol 18 (3) ◽  
pp. 221-227 ◽  
Author(s):  
C.K.L. Davies ◽  
F. Guiu ◽  
M. Li ◽  
M.J. Reece ◽  
R. Torrecillas
Keyword(s):  
Crack Propagation ◽  
Static Loading ◽  
Subcritical Crack Propagation
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