| Analysis of Penetration Model for Geo-Material by Rigid Projectile |
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| 作者姓名： | LI Jianchun MA Guowei YU Maohong |
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| 作者单位： | Nanyang Technological University，Singapore 639798;Xi'an Jiaotong University，Xi'an 710049，China |
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| 摘 要： | Based on the cylindrical cavity expansion theory, a plastic-damage-elastic model is proposed for the penetration problem of geo-material. In the model, the unified strength criterion (Yu, 1991) is adopted as the failure criterion. The distributions of the radial stress and velocity are analyzed. According to the Newton's second law, a series results of the final penetration depth and the impedance load are obtained to different parameter b, when a rigid projectile normally impacts and penetrates a semi-infinite geo-material target with an impact velocity of 300-1200 m/s. By comparing with the test data available, it appears that the method can be used in analyzing the final depth and the impedance load of a rigid projectile penetrating into a semi-infinite target with different impact velocities.
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Analysis of Penetration Model for Geo-Material by Rigid Projectile |
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| LI Jianchun,MA Guowei,YU Maohong.Analysis of Penetration Model for Geo-Material by Rigid Projectile[J].Transactions of Tianjin University,2006,12(Z1). |
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| Authors: | LI Jianchun MA Guowei YU Maohong |
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| Abstract: | Based on the cylindrical cavity expansion theory, a plastic-damage-elastic model is proposed for the penetration problem of geo-material. In the model, the unified strength criterion (Yu, 1991) is adopted as the failure criterion. The distributions of the radial stress and velocity are analyzed. According to the Newton's second law, a series results of the final penetration depth and the impedance load are obtained to different parameter b, when a rigid projectile normally impacts and penetrates a semi-infinite geo-material target with an impact velocity of 300-1200 m/s. By comparing with the test data available, it appears that the method can be used in analyzing the final depth and the impedance load of a rigid projectile penetrating into a semi-infinite target with different impact velocities. |
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| Keywords: | penetration rigid projectile geo-material plastic-damage-elastic unified strength criterion |
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