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Zhang L.,The Third Engineering Scientific Research Institute | He X.,The Third Engineering Scientific Research Institute | Wang X.-F.,The Third Engineering Scientific Research Institute | Kong D.-F.,The Third Engineering Scientific Research Institute
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2015

For detecting the mechanical property of high strain rate of concrete, rock, soil and other non-uniform materials under complex stress state, an experiment device to perform axial impact loading with constant confining pressure was exhibited. The hydrostatic pressure state of specimen was created by using the confining and axial oil cylinders. The axial impact loading on specimen was achieved with large diameter split Hopkinson bar (SHPB) and the dynamic stress-strain curves under constant confining pressure were presented. The advantages of the device are the specimen is under hydrostatic pressure state before applying the axial impact load; the confining pressure of specimen keeps constant during the axial impact loading process. The experiment results denote that the confining pressure has an obvious effect on the dynamic mechanical performance of concrete. © 2015, Chinese Vibration Engineering Society. All right reserved. Source


Xiang X.-Y.,Hohai University | Xiang X.-Y.,The Third Engineering Scientific Research Institute | Zhang C.-X.,The Third Engineering Scientific Research Institute | He X.,The Third Engineering Scientific Research Institute | And 2 more authors.
Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology | Year: 2012

The large diameter split Hopkinson pressure bar (SHPB) experiment was carried out for the dynamic properties of asphalt concrete with high strain rate under different temperatures. The experimental results indicate that the dynamic strength of asphalt concrete increased with the increase of strain rate and the decrease of temperature. The stress-strain curves have the distinct strength degradation under high strain rate. The mechanical properties of asphalt concrete indicate the rate-temperature equivalence. The increase of temperature and the decrease of strain rate have the equivalent effect. Source

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