Numerical simulation on a large diameter SHTB apparatus and dynamic tensile responses of concrete based on mesoscopic models

GUO Ruiqi; REN Huiqi; LONG Zhilin; WU Xiangyun; JIANG Xiquan

doi:10.11883/bzycj-2020-0015

Volume 40 Issue 9

Sep. 2020

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GUO Ruiqi, REN Huiqi, LONG Zhilin, WU Xiangyun, JIANG Xiquan. Numerical simulation on a large diameter SHTB apparatus and dynamic tensile responses of concrete based on mesoscopic models[J]. Explosion And Shock Waves, 2020, 40(9): 093101. doi: 10.11883/bzycj-2020-0015

Citation:

GUO Ruiqi, REN Huiqi, LONG Zhilin, WU Xiangyun, JIANG Xiquan. Numerical simulation on a large diameter SHTB apparatus and dynamic tensile responses of concrete based on mesoscopic models[J]. Explosion And Shock Waves, 2020, 40(9): 093101. doi: 10.11883/bzycj-2020-0015

Citation:

GUO Ruiqi, REN Huiqi, LONG Zhilin, WU Xiangyun, JIANG Xiquan. Numerical simulation on a large diameter SHTB apparatus and dynamic tensile responses of concrete based on mesoscopic models[J]. Explosion And Shock Waves, 2020, 40(9): 093101. doi: 10.11883/bzycj-2020-0015

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Numerical simulation on a large diameter SHTB apparatus and dynamic tensile responses of concrete based on mesoscopic models

doi: 10.11883/bzycj-2020-0015

GUO Ruiqi^{1, 2
,},
REN Huiqi²,
LONG Zhilin^{1
,
,},
WU Xiangyun²,
JIANG Xiquan³

1.
Civil Engineering and Mechanics College, Xiangtan University, Xiangtan 411105, Hunan, China
2.
National Defense Engineering Institute, Academy of Military Science of PLA, Luoyang 471023, Henan, China
3.
Hefei Jiangshui Dynamic Mechanical Experimental Technique Co. Ltd, Hefei 230031, Anhui, China

Received Date: 2020-01-07
Rev Recd Date: 2020-04-01

Available Online: 2020-08-25

Publish Date: 2020-09-01

Abstract

Abstract

Research of concrete materials subjected to tensile stress wave at high strain rates is currently based on splitting experiments and spalling experiments with a split Hopkinson pressure bar device, however, they are not appropriate to study the stress-strain relationship of concrete materials subjected to one dimensional tensile stress wave. Therefore, the large diameter split Hopkinson tensile bar (SHTB) is urgently needed to perform direct dynamic tensile study of concrete materials. Mechanical analysis of a new type of SHTB apparatus was performed in numerical simulation method, then corresponding incident tensile stress wave was studied and optimize improvement measures for partial components were also proposed. The partly improved SHTB apparatus reconciled the demands of glued connect mode, hooked connect mode and so on. At last, concrete was considered as a two-phase composite material which composed of coarse aggregates and cement matrix, the annulus three-dimensional concrete aggregate model was established and applied to SHTB simulation experiment. The comparison between numerical simulation results and experimental results verified the effectiveness of partly improved SHTB apparatus, which also provided research directions for dynamic tensile responses of mesoscopic concrete model.
- SHTB,
- concrete,
- dynamic tensile,
- strain rate,
- mesoscale modeling

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References(33)

References

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