A Finite Cylindrical Cavity Expansion Theory and Its Application

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (4) : 139-143,.

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A Finite Cylindrical Cavity Expansion Theory and Its Application

JIANG Zhigang ; SONG Dianyi; Zeng Shouyi

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ABSTRACT：A Finite Cylindrical Cavity Expansion（FCCE）theory was proposed to the penetration onto thick metal targets with finite planar dimensions. The cavity expansion process in elastic-plastic material with free boundary was divided into elastic-plastic and plastic stages，and the analytical solutions of the radial pressure on the cavity wall were obtained. Based on the Tate's eroding rod model，an engineering model for the penetration of long-rod project onto cylindrical thick metal targets with finite diameters was presented by using the FCCE theory for the target's resistance to penetration. Comparisons between the presented model and previously published ballistic experiments show that the penetration depths from the presented model are in good agreement with those from the ballistic experiments.

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impact mechanics / cavity expansion / engineering model / metal armour / long-rod project

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JIANG Zhigang;SONG Dianyi; Zeng Shouyi. A Finite Cylindrical Cavity Expansion Theory and Its Application[J]. Journal of Vibration and Shock, 2011, 30(4): 139-143,