Experimental study and simulation analysis of concrete crack propagation under impact load

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (17) : 107-112.

ZHANG Hua1,GUO Jixin1,FU Yuzhen1,Gao Qun2

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Abstract

The radial spitting crack experiment were conducted by using improved Hopkinson pressure bar (SHPB) for flattened Brazilian disc (FBD) and cracked straight through flattened Brazilian disc (CSTFBD) under different stain rate, splitting tensile stress-radial strain curves of flattened Brazilian disc, dynamic elastic modulus, peak stress, peak strain and tensile strain rate sensitive coefficient effects of concrete with three different strength grades were obtained. In addition, the influence of pre-crack with different angle on fracture toughness of cracked straight through flattened Brazilian disc and the relationship between composite ratio of mixed mode cracks and loading angle. The crack propagation and failure mechanism were studied and the results of experiments and XFEM simulation were compared. The results show that the growth trends of cracks by test are consistent with those of numerical simulation.

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ZHANG Hua1,GUO Jixin1,FU Yuzhen1,Gao Qun2. Experimental study and simulation analysis of concrete crack propagation under impact load[J]. Journal of Vibration and Shock, 2016, 35(17): 107-112

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