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Penetration trajectory of rigid projectile in the heterogeneous meso-scale concrete target

Zhang, Jie / Wang, Zhiyong / Wang, Zhihua / Shu, Xuefeng / Li, QM

For the normal penetration of a symmetrical rigid projectile into a concrete target with coarse aggregates, the lateral deflection may occur under certain conditions depending on geometrical parameters of the projectile, impact velocity and coarse aggregate distribution. In this work, four dimensionless numbers of projectile, that is, impact factor $I^{*}$ , length-to-diameter ratio $L / D$ , nose factor $N^{*}$ and the relative location of mass center $L_{c} / L$ , are employed to study the effects of projectile parameters on the deflection of penetration trajectory. Numerical studies based on three-dimensional (3D) meso-scale concrete model are conducted and the projectile trajectories are obtained under different dimensionless numbers. According to the development of the deflection angle during the rigid projectile penetration into meso-scale concrete, the motion of the projectile can be divided into four stages, that is, initial deflection, rapid change, deflection rebound and final stage. The numerical results show that, for the same meso-scale concrete target, the deflection of the projectile trajectory becomes larger with the increases of $I^{*}$ , $N^{*}$ and $L_{c} / L$ , while the deflection angle of projectile decreases with the increase of $L / D$ .

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Penetration trajectory of rigid projectile in the heterogeneous meso-scale concrete target

Zhang, Jie / Wang, Zhiyong / Wang, Zhihua / Shu, Xuefeng / Li, QM

For the normal penetration of a symmetrical rigid projectile into a concrete target with coarse aggregates, the lateral deflection may occur under certain conditions depending on geometrical parameters of the projectile, impact velocity and coarse aggregate distribution. In this work, four dimensionless numbers of projectile, that is, impact factor $I^{*}$ , length-to-diameter ratio $L / D$ , nose factor $N^{*}$ and the relative location of mass center $L_{c} / L$ , are employed to study the effects of projectile parameters on the deflection of penetration trajectory. Numerical studies based on three-dimensional (3D) meso-scale concrete model are conducted and the projectile trajectories are obtained under different dimensionless numbers. According to the development of the deflection angle during the rigid projectile penetration into meso-scale concrete, the motion of the projectile can be divided into four stages, that is, initial deflection, rapid change, deflection rebound and final stage. The numerical results show that, for the same meso-scale concrete target, the deflection of the projectile trajectory becomes larger with the increases of $I^{*}$ , $N^{*}$ and $L_{c} / L$ , while the deflection angle of projectile decreases with the increase of $L / D$ .

Penetration trajectory of rigid projectile in the heterogeneous meso-scale concrete target

Zhang, Jie / Wang, Zhiyong / Wang, Zhihua / Shu, Xuefeng / Li, QM

For the normal penetration of a symmetrical rigid projectile into a concrete target with coarse aggregates, the lateral deflection may occur under certain conditions depending on geometrical parameters of the projectile, impact velocity and coarse aggregate distribution. In this work, four dimensionless numbers of projectile, that is, impact factor $I^{*}$ , length-to-diameter ratio $L / D$ , nose factor $N^{*}$ and the relative location of mass center $L_{c} / L$ , are employed to study the effects of projectile parameters on the deflection of penetration trajectory. Numerical studies based on three-dimensional (3D) meso-scale concrete model are conducted and the projectile trajectories are obtained under different dimensionless numbers. According to the development of the deflection angle during the rigid projectile penetration into meso-scale concrete, the motion of the projectile can be divided into four stages, that is, initial deflection, rapid change, deflection rebound and final stage. The numerical results show that, for the same meso-scale concrete target, the deflection of the projectile trajectory becomes larger with the increases of $I^{*}$ , $N^{*}$ and $L_{c} / L$ , while the deflection angle of projectile decreases with the increase of $L / D$ .

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Title:

Penetration trajectory of rigid projectile in the heterogeneous meso-scale concrete target

Contributors:

Zhang, Jie (author) / Wang, Zhiyong (author) / Wang, Zhihua (author) / Shu, Xuefeng (author) / Li, QM (author)

Published in:

Advances in Structural Engineering ; 25 ; 1469-1482

Publication date:

2022-05-01

Size:

14 pages

ISSN:

1369-4332 , 2048-4011

DOI:

https://doi.org/10.1177/13694332221087342

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

deflection angle , rigid projectile penetration , meso-scale concrete model , penetration trajectory , coarse aggregate

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