Determination of dynamic initiation toughness and propagation toughness of sandstone using CSTBD specimens

Yang Jing-rui; Zhang Cai-gui; Zhou Yan; Wang Qi-zhi

doi:10.11883/1001-1455(2014)03-0264-08

Volume 34 Issue 3

Aug. 2014

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Yang Jing-rui, Zhang Cai-gui, Zhou Yan, Wang Qi-zhi. Determination of dynamic initiation toughness and propagation toughness of sandstone using CSTBD specimens[J]. Explosion And Shock Waves, 2014, 34(3): 264-271. doi: 10.11883/1001-1455(2014)03-0264-08

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Yang Jing-rui, Zhang Cai-gui, Zhou Yan, Wang Qi-zhi. Determination of dynamic initiation toughness and propagation toughness of sandstone using CSTBD specimens[J]. Explosion And Shock Waves, 2014, 34(3): 264-271. doi: 10.11883/1001-1455(2014)03-0264-08

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Determination of dynamic initiation toughness and propagation toughness of sandstone using CSTBD specimens

doi: 10.11883/1001-1455(2014)03-0264-08

Department of Civil Engineering and Applied Mechanics, Sichuan University, Chengdu 610065, Sichuan, China

Funds: Supported by the National Natural Science Foundation of China (51179115)

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Corresponding author: Wang Qi-zhi, qzwang2004@163.com
Received Date: 2012-11-22
Publish Date: 2014-05-25

Abstract

Abstract

The CSTBD (cracked straight-through Brazilian disc) specimens of sandstone were diametrically impacted by the split Hopkinson pressure bar of large diameter in the mode-Ⅰ (opening mode) rock dynamic fracture test.The experimental-numerical method was employed to obtain the dynamic initiation toughness under different dynamic loading rates; and based on some theoretical analysis and reasonable simplification, the experimental-numerical method and universal function were employed to obtain the dynamic propagation toughness with different crack velocities.In order to verify the validity of the universal function and the experimental-numerical method, comparisons with well-established references of concern were made, and our results present the same law of phenomena as those derived from other researchers.Increases in the dynamic initiation toughness and the dynamic propagation toughness were observed with increasing dynamic loading rate and crack tip speed, respectively.

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References(32)

References

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