Study on strain rate effect of coral sand

DONG Kai; REN Huiqi; RUAN Wenjun; NING Huijun; GUO Ruiqi; HUANG Kui

doi:10.11883/bzycj-2019-0432

Volume 40 Issue 9

Sep. 2020

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DONG Kai, REN Huiqi, RUAN Wenjun, NING Huijun, GUO Ruiqi, HUANG Kui. Study on strain rate effect of coral sand[J]. Explosion And Shock Waves, 2020, 40(9): 093102. doi: 10.11883/bzycj-2019-0432

Citation:

DONG Kai, REN Huiqi, RUAN Wenjun, NING Huijun, GUO Ruiqi, HUANG Kui. Study on strain rate effect of coral sand[J]. Explosion And Shock Waves, 2020, 40(9): 093102. doi: 10.11883/bzycj-2019-0432

DONG Kai, REN Huiqi, RUAN Wenjun, NING Huijun, GUO Ruiqi, HUANG Kui. Study on strain rate effect of coral sand[J]. Explosion And Shock Waves, 2020, 40(9): 093102. doi: 10.11883/bzycj-2019-0432

Citation:

DONG Kai, REN Huiqi, RUAN Wenjun, NING Huijun, GUO Ruiqi, HUANG Kui. Study on strain rate effect of coral sand[J]. Explosion And Shock Waves, 2020, 40(9): 093102. doi: 10.11883/bzycj-2019-0432

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Study on strain rate effect of coral sand

doi: 10.11883/bzycj-2019-0432

DONG Kai^1
,,
REN Huiqi^{1, 2
,
,},
RUAN Wenjun¹,
NING Huijun^{2, 3},
GUO Ruiqi²,
HUANG Kui²

1.
School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
Institute of Defense Engineering, AMS, PLA, Luoyang 471023, Henan, China
3.
School of Civil Engineering, Henan University of Science and Technology, Luoyang 471023, Henan, China

Received Date: 2019-11-12
Rev Recd Date: 2020-01-21
Publish Date: 2020-09-01

Abstract

Abstract

A 37 mm-diameter split Hopkinson pressure bar (SHPB) apparatus was used to conduct impact tests on two types of coral sand to investigate the effect of strain rate. One-dimensional compressive stress-strain curves with the strain rates ranging from 460 to 1300 s⁻¹ were obtained under different compactness levels. Combining with the static compressive results (strain rate of 10⁻⁴ s⁻¹), it is found that coral sand is affect with strain rate obviously. Comparison of physical properties of two types of coral sand indicates that the strain rate sensitivity is highly correlated with the proportion of inner pores of the particles and friction between the particles. The calculation models of dynamic intensification factor are proposed, which provide theoretical basis for the numerical calculation of coral sand under impact.
- coral sand,
- strain rate effect,
- inner pore,
- impact,
- strengthening coefficient

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References(30)

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