Study on influence rule of a lining structure on high speed driving of reactive fragment

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (4) : 230-238.

JIAO Xiaolong1, WANG Yuanjing1, WU Zongya2, XU Yuxin3

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Abstract

To achieve high velocity and high integrity of the reactive fragment during explosive driving, the influence rule of lining structure on high-speed driving of reactive fragment was studied. Based on the law of conservation of energy, a new model of initial speed of preformed fragment was established by theoretical derivation, which considered the elongation of lining material. Three linings of 2A12 aluminum, 20 steel and 20 steel/aramid composite structure were selected. Based on the equation of state, the interfacial pressure on the contact surface between the lining and the fragment was analyzed. The breakage of reactive fragments and the new model were verified by the static explosion test. Results show that the elongation of 20 steel is 145.83% higher than that of 2A12 aluminum, the loading ratio of warhead with 20 steel/aramid composite lining is 14% lower than that of 2A12 aluminum lining, and the initial fragment velocity is 10.85% higher. The new model is well consistent with the experiment results, and its calculation accuracy is more than 8% higher than the existing model. Based on experimental results and theoretical analysis, it is shown that the reactive fragments remains integrity at a driving speed of more than 2300m/s by using 20 steel/aramid composite lining.

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ordnance science and technology / preformed fragment warhead / explosive driven / initial velocity

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JIAO Xiaolong1, WANG Yuanjing1, WU Zongya2, XU Yuxin3. Study on influence rule of a lining structure on high speed driving of reactive fragment[J]. Journal of Vibration and Shock, 2024, 43(4): 230-238

References

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