Volume 39 Issue 11
Nov.  2019
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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
Citation: 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

Analyses of the size effect for projectile penetrations into concrete targets

doi: 10.11883/bzycj-2018-0402
  • Received Date: 2018-10-18
  • Rev Recd Date: 2019-01-30
  • Available Online: 2019-10-25
  • Publish Date: 2019-11-01
  • 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.
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