| Radial explosion strain and its fracture effect from confined explosion with charge of cyclonite |
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| 作者姓名： | 徐国元 段乐珍 古德生 闫长斌 |
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| 作者单位： | SchoolofResourcesandSafetyEngineering,CentralSouthUniversity,Changsha410083,China |
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| 摘 要： | Instrumented experiments were conducted in concrete models to study the explosion-induced radial strain and fracture effect of rock-like media under confined explosion with a charge of cyclonite. As a charge was exploded,two different radial strain waves were sequentially recorded by a strain gage at a distance of 80 mm from the center of charge. Through the attenuation formula of the maximum compressive strain(εrmax), the distribution of εrmax and its strain rate(ε) between the charge and gage were obtained. The effect of the two waves propagating outwards on the radial fracture of surrounding media was discussed. The results show that the two waves are pertinent to the loading of shock energy (Es) and bubble energy (Eb) against concrete surrounding charge, respectively. The former wave lasts for much shorter time than the latter. The peak values of εrmax and ε of the former are higher than those of the latter, respectively.
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| 关 键 词： | 约束爆炸装药 径向应变 射状断裂 混凝土 冲击能量 气泡能量 |
| 收稿时间： | 1 September 2003 |
| 修稿时间： | 8 January 2004 |
Radial explosion strain and its fracture effect from confined explosion with charge of cyclonite |
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| Xu Guo-yuan , Duan Le-zhen , Gu De-sheng and Yan Chang-bin.Radial explosion strain and its fracture effect from confined explosion with charge of cyclonite[J].Journal of Central South University of Technology,2004,11(4):429-433. |
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| Authors: | Xu Guo-yuan Duan Le-zhen Gu De-sheng and Yan Chang-bin |
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| Affiliation: | (1) School of Resources and Safety Engineering, Central South University, 410083 Changsha, China |
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| Abstract: | Instrumented experiments were conducted in concrete models to study the explosion-induced radial strain and fracture effect of rock-like media under confined explosion with a charge of cyclonite. As a charge was exploded,two different radial strain waves were sequentially recorded by a strain gage at a distance of 80 mm from the center of charge. Through the attenuation formula of the maximum compressive strain(εrmax ), the distribution of εrmax and its strain rate(ε) between the charge and gage were obtained. The effect of the two waves propagating outwards on the radial fracture of surrounding media was discussed. The results show that the two waves are pertinent to the loading of shock energy (Es) and bubble energy (Eb) against concrete surrounding charge, respectively. The former wave lasts for much shorter time than the latter. The peak values of εrmax and ε of the former are higher than those of the latter, respectively. |
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| Keywords: | confined explosion loading radial strain radial fracture concrete shock energy bubble energy |
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