Research on Improving the Test Effectiveness of Rock Dynamic Fracture Toughness

2012 ◽  
Vol 164 ◽  
pp. 446-450
Author(s):  
Sheng Zhang ◽  
Xin Wen Li ◽  
Xiang Hao Yang
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
Dynamic Load ◽  
Strain Gauge ◽  
Dynamic Fracture Toughness ◽  
Test Methods ◽  
Dynamic Parameters ◽  
Pulse Shaper ◽  
Wave Data ◽  
Fracture Time

Some problems of testing rock dynamic parameters in the SHPB experiment were analyzed and the relevant measures were proposed, which included how to determining the fracture time and the dynamic load etc. Based on the dynamic fracture experiment in the SHPB system with flattened Brazilian disc made of marble, the strain gauge technique to get the accurate fracture time was applied, and the different pulse shaper were adopted to get more precise wave data. The effective test methods of determining rock dynamic fracture toughness were discussed.

Effect of the Stress Balance on Determination of Rock Dynamic Fracture Toughness Using Holed-Cracked Flattened Brazilian Disc

2011 ◽  
Vol 117-119 ◽  
pp. 71-76 ◽  
Author(s):  
Sheng Zhang ◽  
Xin Wen Li
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
Dynamic Stress ◽  
Dynamic Stress Intensity Factor ◽  
Fem Analysis ◽  
Dynamic Fracture Toughness ◽  
Necessary Condition ◽  
Brazilian Disc ◽  
Fracture Time ◽  
Early Loading

Based on the experimental and FEM analysis, it was discussed that the stress balance was not a necessary condition for determining rock dynamic fracture toughness accurately using holed-cracked flattened Brazilian disc. The dynamic stress distribution modes of disc sample with time change were analyzed from the early loading stage to continued loading process. It was proved that the fracture time may occur before the balance of stress was achieved. It was not necessary meet the condition of the stress balance using the experiment combined with numerical method. We could get dynamic fracture toughness, according to the dynamic stress intensity factor of the crack tip and fracture time.

Dynamic fracture toughness (JId) behavior of armor-grade Q&T steel weldments: Effect of weld metal composition and microstructure

2009 ◽  
Vol 15 (6) ◽  
pp. 1017-1026 ◽  
Author(s):  
Govindaraj Magudeeswaran ◽  
Visvalingam Balasubramanian ◽  
S. Sathyanarayanan ◽  
Gankidi Madhusudhan Reddy ◽  
A. Moitra ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Weld Metal ◽  
Dynamic Fracture ◽  
Dynamic Fracture Toughness ◽  
Metal Composition ◽  
Weld Metal Composition

Investigation of loading rate and plate thickness effects in dynamic fracture toughness of PMMA

1997 ◽  
Vol 57 (4) ◽  
pp. 459-460
Author(s):  
H. Wada ◽  
M. Seika ◽  
T.C. Kennedy ◽  
C.A. Calder ◽  
K. Murase
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
Loading Rate ◽  
Plate Thickness ◽  
Dynamic Fracture Toughness

Dynamic Fracture Toughness of High-Strength 5KhN3МА Steel

2021 ◽  
Vol 2021 (9) ◽  
pp. 1051-1059
Author(s):  
L. R. Botvina ◽  
M. R. Tyutin ◽  
Yu. S. Perminova ◽  
A. V. Utkin
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
High Strength ◽  
Dynamic Fracture Toughness
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