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A platform for research: civil engineering, architecture and urbanism
Dynamic Brazilian test of concrete using split Hopkinson pressure bar
Abstract To research the fracture pattern of concrete specimens, the dynamic splitting tensile tests are conducted in different arc loading angles and impact velocities. The stress state of the specimens can be calculated by analyzing the strain gauges data on the split Hopkinson pressure bar. The specimens under the lower impact velocity achieves the stress equilibrium in loading direction, and the stress-state of the specimen is similar to that of quasi-static condition, in which the initial crack occurs at the center of the specimen and propagates along the loading diameter direction. When the impact velocity increases, the stress equilibrium is difficult to attain, and multiple cracks sometimes even ribbon fracture fragments appear at the center of specimens. The impact velocity plays a significant role in the failure pattern of concrete specimens, and different angles arc loading affect the local stress distribution of the specimens. The suitable load angle can reduce the local failure and improve the failure pattern of specimens. The stress state and failure pattern of specimens simulated by LS-DYNA coincide with the test results.
Dynamic Brazilian test of concrete using split Hopkinson pressure bar
Abstract To research the fracture pattern of concrete specimens, the dynamic splitting tensile tests are conducted in different arc loading angles and impact velocities. The stress state of the specimens can be calculated by analyzing the strain gauges data on the split Hopkinson pressure bar. The specimens under the lower impact velocity achieves the stress equilibrium in loading direction, and the stress-state of the specimen is similar to that of quasi-static condition, in which the initial crack occurs at the center of the specimen and propagates along the loading diameter direction. When the impact velocity increases, the stress equilibrium is difficult to attain, and multiple cracks sometimes even ribbon fracture fragments appear at the center of specimens. The impact velocity plays a significant role in the failure pattern of concrete specimens, and different angles arc loading affect the local stress distribution of the specimens. The suitable load angle can reduce the local failure and improve the failure pattern of specimens. The stress state and failure pattern of specimens simulated by LS-DYNA coincide with the test results.
Dynamic Brazilian test of concrete using split Hopkinson pressure bar
Chen, Xudong (author) / Ge, Limei (author) / Zhou, Jikai (author) / Wu, Shengxing (author)
Materials and Structures ; 50 ; 1-15
2016-08-04
15 pages
Article (Journal)
Electronic Resource
English
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