Experimental study for dynamic fragmentation of brittle expansion rings

TANG Jiani; XU Bian; ZHENG Yuxuan; ZHOU Fenghua

doi:10.11883/bzycj-2020-0049

Volume 41 Issue 1

Jan. 2021

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TANG Jiani, XU Bian, ZHENG Yuxuan, ZHOU Fenghua. Experimental study for dynamic fragmentation of brittle expansion rings[J]. Explosion And Shock Waves, 2021, 41(1): 014101. doi: 10.11883/bzycj-2020-0049

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TANG Jiani, XU Bian, ZHENG Yuxuan, ZHOU Fenghua. Experimental study for dynamic fragmentation of brittle expansion rings[J]. Explosion And Shock Waves, 2021, 41(1): 014101. doi: 10.11883/bzycj-2020-0049

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Experimental study for dynamic fragmentation of brittle expansion rings

doi: 10.11883/bzycj-2020-0049

TANG Jiani^1
,,
XU Bian¹,
ZHENG Yuxuan^{1, 2
,
,},
ZHOU Fenghua¹

1.
MOE Key Laboratory of Impact and Safety Engineering, Ningbo University, Ningbo 315211, Zhejiang, China
2.
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

Received Date: 2020-02-28
Rev Recd Date: 2020-06-29
Publish Date: 2021-01-05

Abstract

Abstract

A liquid-driving brittle expansion ring test technique has been developed. The precise centering of the brittle ring was realized by means of a liftable convex platform to avoid the bending fracture caused by eccentric expansion. The strain vs time curves in the process of tensile fracture were measured by the semiconductor strain gauges on the expansion ring. Then expansion tensile fracture experiments of silicon carbide (SiC) ceramics were carried out, and their dynamic tensile fracture strength and average size and distribution of fragments were obtained. The experimental results show as follows. (1) The liquid-driving expansion ring experiment can better achieve the tensile fracture of the ceramic material. At a strain rate of 10¹ s⁻¹, the tensile fracture strain of SiC ceramic is 3.7×10⁻⁴−7.4×10⁻⁴, and the average tensile fracture stress is 206 MPa. (2) The dimensionless average fragment size of SiC ceramic falls within the reasonable interval of various brittle fracture prediction models. With the increase of loading strain rate, the average fragment size of SiC ceramic decreases. (3) The fragment distribution of SiC ceramic tensile fracture basically conforms to the Rayleigh distribution, but there are some deviations in the fine size and large size fragment distribution.
- liquid-driving expansion,
- SiC ceramics,
- brittle fracture,
- fragment size,
- fragment distribution

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References(27)

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