A wing-crack extension model for tensile response of saturated rocks under coupled static-dynamic loading

2021 ◽  
Vol 146 ◽  
pp. 104893
Author(s):  
Yi Liu ◽  
Feng Dai ◽  
Pengda Pei
Keyword(s):  
Dynamic Loading ◽  
Crack Extension ◽  
Wing Crack ◽  
Tensile Response ◽  
Extension Model

Threshold Characteristics of Short Pulse Loads Causing Fracture in Concrete and Rocks

2011 ◽  
Vol 82 ◽  
pp. 106-111 ◽  
Author(s):  
Ivan V. Smirnov ◽  
Yuri V. Petrov ◽  
Yuri V. Sudenkov ◽  
Ezio Cadoni
Keyword(s):  
Experimental Investigation ◽  
Fracture Surface ◽  
Dynamic Loading ◽  
Pulse Energy ◽  
Crack Extension ◽  
Short Pulse ◽  
High Rate ◽  
Rectangular Plates ◽  
Wire Explosion ◽  
Measured Dependence

Results of experimental investigation of concrete and rocks under high rate loads of microsecond duration (2.5 µs) are presented. Tested samples are rectangular plates (150/150/15 mm) with a notch (70 mm long and 3 mm thick) containing a pre-crack (about 1 mm long). Dynamic loading was created utilizing electric wire explosion technique. An electric wire was placed between the faces of the notch at a distance of 20 mm from the tip of the pre-crack. After the wire explosion the trajectory of the extended crack and the fracture surface were studied. Measured dependence of the crack extension on the loading pulse energy gives the possibility of determining the threshold (minimal) amplitude of the load required to initiate fracture in the studied samples.

A multi-layer parallel crack extension model for deformational response of post-installed anchor

2013 ◽  
Vol 17 (5) ◽  
pp. 908-920 ◽  
Author(s):  
Muhammad Saleem ◽  
Asad Ullah Qazi ◽  
Asif Hameed ◽  
Muhammad Aun Bashir
Keyword(s):  
Crack Extension ◽  
Parallel Crack ◽  
Extension Model

Hub-extension model and access to pediatric behavioral integrated primary care.

2020 ◽  
Vol 8 (3) ◽  
pp. 220-227
Author(s):  
Rachel G. Lilly ◽  
Tawnya J. Meadows ◽  
Jessica R. Sevecke-Hanrahan ◽  
Carrie E. Massura ◽  
Maria E. Golden ◽  
...  
Keyword(s):  
Primary Care ◽  
Integrated Primary Care ◽  
Extension Model
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