Analyses of the size effect for projectile penetrations into concrete targets

PENG Yong; LU Fangyun; FANG Qin; WU Hao; LI Xiangyu

doi:10.11883/bzycj-2018-0402

Volume 39 Issue 11

Nov. 2019

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Article Navigation > Explosion And Shock Waves > 2019 > 39(11): 113301

PENG Yong, LU Fangyun, FANG Qin, WU Hao, LI Xiangyu. Analyses of the size effect for projectile penetrations into concrete targets[J]. Explosion And Shock Waves, 2019, 39(11): 113301. doi: 10.11883/bzycj-2018-0402

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PENG Yong, LU Fangyun, FANG Qin, WU Hao, LI Xiangyu. Analyses of the size effect for projectile penetrations into concrete targets[J]. Explosion And Shock Waves, 2019, 39(11): 113301. doi: 10.11883/bzycj-2018-0402

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Analyses of the size effect for projectile penetrations into concrete targets

doi: 10.11883/bzycj-2018-0402

1.
College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, Hunan, China
2.
College of Defense Engineering, PLA Amy Engineering University, Nanjing 210007, Jiangsu, China
3.
Research Institute of Structural Engineering and Disaster Reduction, College of Civil Engineering, Tongji University, Shanghai 200092, China

Received Date: 2018-10-18
Rev Recd Date: 2019-01-30

Available Online: 2019-10-25

Publish Date: 2019-11-01

Abstract

Abstract

Whether the replica scaling law holds or not is of great significance because penetration tests of concrete targets against rigid projectiles are commonly conducted in a reduced scale. In this paper, based on the replica scaling model and the analyses of penetration tests with various sizes and empirical formulae, we found that there exists a size effect in general for penetration depth, and the dimensionless depth increases with as does the size. However, the replica scaling law is satisfied for the penetration depth in rigid projectile penetrations, as long as the scaling is done strictly for both projectiles and concrete targets, including the coarse aggregates. We also found that the coarse aggregates of an invariant size (not replica-scaled) are the major factor accounting for the size effect in penetration depth found in tests and empirical formulae. To find out about the size effect resulting from aggregates, we developed a 2D mesoscopic finite element model for concrete target and conducted numerical simulations that successfully represent the size effect, thereby proving that penetration formula with size effect considered could well predict the penetration tests with different size.
- penetration depth,
- concrete,
- size effect,
- mesoscopic model

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References

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