| Stability analyses of the mass abrasive projectile high-speed penetrating into concrete target. Part Ⅱ： Structural stability analyses |
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| 作者姓名： | Hao Wu ;Xiao-Wei Chen ;Qin Fang ;Li-Lin He |
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| 作者单位： | [1]Institute of Systems Engineering,China Academy of Engineering Physics,621999 Mianyang, China; [2]State Key Laboratory for Disaster Prevention & Mitigationof Explosion & Impact,PLA University of Science and Technology,210007 Nanjing, China |
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| 基金项目： | supported by the National Outstanding Young Scientists Foundation of China(11225213);the Funds for Creative Research Groups of China(51321064);the National Natural Science Foundation of China(11172282 and 51378015) |
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| 摘 要： | The initial oblique and attacking angles as well as the asymmetrical nose abrasion may lead to bending or even fracture of a projectile,and the penetration efficiency decreases distinctly.The structural stability of a high-speed projectile non-normally penetrating into concrete and the parametric influences involved are analyzed with the mass abrasion taken into account.By considering the symmetrical or asymmetrical nose abrasion as well as the initial oblique and attacking angles,both the axial and the transverse drag forces acting on the projectile are derived.Based on the ideal elastic-plastic yield criterion,an approach is proposed for predicting the limit striking velocity（LSV）that is the highest velocity at which no yielding failure has occurred and the projectile can still maintain its integral structural stability.Furthermore,some particular penetration scenarios are separately discussed in detail.Based on the engineering model for the mass loss and nose-blunting of ogive-nose projectiles established in Part I of this study,the above approach is validated by several high-speed penetration tests.The analysis on parametric influences indicates that the LSV is reduced with an increase in the asymmetrical nose abrasion,thelength-diameter-ratio,and the concrete strength,as well as the oblique and attacking angles.Also,the LSV raises with an increase in the initial caliber-radius-head（CRH）and the dimensionless cartridge thickness of a projectile.
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| 关 键 词： | 结构稳定性 混凝土强度 稳定性分析 高速侵彻 高速弹丸 磨料 大众 屈服准则 |
Stability analyses of the mass abrasive projectile high-speed penetrating into concrete target. Part Ⅱ： Structural stability analyses |
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| Hao Wu,;Xiao-Wei Chen,;Qin Fang,;Li-Lin He.Stability analyses of the mass abrasive projectile high-speed penetrating into concrete target. Part Ⅱ： Structural stability analyses[J].Acta Mechanica Sinica,2014(6):943-955. |
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| Authors: | Hao Wu Xiao-Wei Chen Qin Fang Li-Lin He |
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| Abstract: | The initial oblique and attacking angles as well as the asymmetrical nose abrasion may lead to bending or even fracture of a projectile,and the penetration efficiency decreases distinctly.The structural stability of a high-speed projectile non-normally penetrating into concrete and the parametric influences involved are analyzed with the mass abrasion taken into account.By considering the symmetrical or asymmetrical nose abrasion as well as the initial oblique and attacking angles,both the axial and the transverse drag forces acting on the projectile are derived.Based on the ideal elastic-plastic yield criterion,an approach is proposed for predicting the limit striking velocity(LSV)that is the highest velocity at which no yielding failure has occurred and the projectile can still maintain its integral structural stability.Furthermore,some particular penetration scenarios are separately discussed in detail.Based on the engineering model for the mass loss and nose-blunting of ogive-nose projectiles established in Part I of this study,the above approach is validated by several high-speed penetration tests.The analysis on parametric influences indicates that the LSV is reduced with an increase in the asymmetrical nose abrasion,thelength-diameter-ratio,and the concrete strength,as well as the oblique and attacking angles.Also,the LSV raises with an increase in the initial caliber-radius-head(CRH)and the dimensionless cartridge thickness of a projectile. |
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| Keywords: | Projectile High-speed penetration Concrete Oblique angle Attacking angle Asymmetrical nose abrasion |
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