Penetration model for concrete-rock targets based on hoek-brown criterion

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (5) : 48-53.

CAO Yangyueye,JIANG Zhigang,TAN Qinghua,MENG Chaomei

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Abstract

The cavity expansion theory is a common method to establish an engineering model for penetration problems.Based on a target’s elastic-cracked-comminuted response model,a new semi-infinite spherical cavity expansion model for brittle materials,such as,rock and concrete was built here.The material in the comminuted region was assumed to obey Hoek-Brown yield criterion.The static cavity expansion stress was obtained,and used as an alternative for the penetration resistance in the two-stage penetration model proposed by Forrestal.A predicting model of penetration depth for rigid projectiles penetrating a semi-infinite brittle material target was developed.It was shown that compared with previous models，the proposed prediction model here is more adaptive，especially,for high strength concrete and rock targets.

Key words

penetration / concrete-rock target / engineering model / cavity expansion / Hoek-Brown criterion

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CAO Yangyueye,JIANG Zhigang,TAN Qinghua,MENG Chaomei. Penetration model for concrete-rock targets based on hoek-brown criterion[J]. Journal of Vibration and Shock, 2017, 36(5): 48-53

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