A Study of the Dynamic Plane Strain Fracture Toughness of Concrete by SHPB |
| Journal |
Key Engineering Materials (Volumes 385 - 387) |
| Volume |
Advances in Fracture and Damage Mechanics VII |
| Edited by |
H.S. Lee, I.S. Yoon and M.H. Aliabadi |
| Pages |
21-24 |
| DOI |
10.4028/www.scientific.net/KEM.385-387.21 |
| Online since |
July, 2008 |
| Authors |
Jia Qu,
Guang Ping Zou
|
| Keywords |
Concrete, Hopkinson Press Bar, Plane-Strain Fracture Toughness, Strain Rate |
| Abstract |
Concrete is a type of engineering composites which is widely used in military and civil
structures. The static performance of concrete can not be used to estimate the variation of concrete under
high strain rates under dynamic loads. By introducing the three point bending test under static and
dynamic loads, the plane strain fracture toughness KIC and KId were measured. Using the application of
experimental-numerical method a three-dimensional model has been established by FEM software
Ansys/LS-DYNA, to carryout transient analysis, and the response curves of stress intensity factor-time
through the opening displacement of fracture. Thus, with obtaining the cracking time by the method of
strain-gauge, the dynamic plane strain fracture toughness KId can be determined. By comparing KIc and
KId we could conclude the result which meant concrete was more liable to crack under dynamic load. |
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