Depth of penetration of high-speed penetrator with including the effect of mass abrasion

Zhao, Jianhua; Chen, X.W.; Jin, Fengnian; Xu, Yuzhi

doi:10.1016/j.ijimpeng.2010.03.008

Cited by 34 publications

(24 citation statements)

References 19 publications

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“…For the nose blunting of the projectile, Zhao and Chen et al [34] proposed that the variation of the nose factor * N of the ogive-nosed projectile during the penetration process satisfy ( )…”

Section: Volumes Of Impact Cratersmentioning

confidence: 99%

Projectile impact resistance of corundum aggregated UHP-SFRC

Fang

Gong

et al. 2015

International Journal of Impact Engineering

113

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Section: Volumes Of Impact Cratersmentioning

confidence: 99%

Projectile impact resistance of corundum aggregated UHP-SFRC

Fang

Gong

et al. 2015

International Journal of Impact Engineering

113

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“…Therefore, Zhao et al [22] introduced relationships between m, N * and instant penetration velocity v based on the published experimental results. They extrapolated the linear relation between the mass loss before and after the penetration and the initial kinetic energy of penetrator to the whole process of penetration in a similar way as did in Eq.…”

Section: Discussion On the Dopmentioning

confidence: 99%

“…After omitting the term dm/dt in Eq. (11) as a second order small quantity, DOP Z was obtained as [22] …”

Section: Discussion On the Dopmentioning

confidence: 99%

Parametric study on mass loss of penetrators

Chen

2010

Acta Mech Sin

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Earth penetration weapon (EPW) is applicable for attacking underground targets protected by reinforced concrete and rocks. With increasing impact velocity, the mass loss/abrasion of penetrator increases, which significantly decreases the penetration efficiency due to the change of nose shape. The abrasion may induce instability of the penetrator, and lead to failure of its structure. A common disadvantage, i.e. dependence on corresponding experimental results, exists in all the available formulae, which limits their ranges of application in estimating the mass loss of penetrator. In this paper, we conduct a parametric study on the mass loss of penetrator, and indicate that the mass loss of penetrator can be determined by seven variables, i.e., the initial impact velocity, initial nose shape, melting heat, shank diameter of projectile and density and strength of target as well as the aggregate hardness of target. Further discussion on factors dominant in the mass abrasion of penetrator are given, which may be helpful for optimizing the target or the projectile for defensive or offensive objectives, respectively.Keywords Penetrator · Mass loss · Depth of penetration · Parametric study List of symbolsA surface area of projectile nose (m 2 ) b length of projectile nose (m) C proportional coefficient of mass loss to initial kinetic energy of projectile (s 2 m −2 ) C p specific heat at constant pressure (J (kg K) −1 ) d shank diameter of projectile (m) f friction force per unit area (Pa) f c unconstrained compressive strength of concrete target (Pa) F n instant axial drag force on projectile nose (N) H Moh's hardness of aggregate H 0 reference value of Moh's hardness of aggregate k mechanical equivalent of heat (J cal −1 ) m instant mass of projectile (kg) M 0 initial mass of projectile (kg) M f mass of residual projectile (kg) N * instant nose factor of projectile N * 0 initial nose factor of projectile N * 1 and N * 2 dimensionless constant related to nose geometry p pressure on projectile nose (Pa) Q melting heat for unit mass of projectile (cal) R c Rockwell hardness S empirical constant for concrete target and related to f c t time (s) T Kelvin temperature (K) v instant penetration velocity (m s −1 ) 123 586 L. He et al. V s initial impact velocity of projectile (m s −1 ) w t friction work (J) z instant DOP of projectile (m) Z ultimate DOP of projectile (m) χ constant defined in Ref. [23] (kg m −3 )

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“…For example, Luk and Piekutowski (1991) produced a model which accounted for the elasto-plastic nature of the projectile, with several authors developing this approach further (Yaziv and Riegel, 1993;Roisman, Yarin et al, 2001;Rubin and Yarin, 2002). Khoda-rahmi, Fallahi et al (2006) and Zhao, Chen et al (2010) originated a different model for concrete penetration considering the effects of projectile erosion employing a step process, where the penetration depth and the erosion were calculated alternatively. However, there are not many FEA studies available for high speed deforming projectiles into concrete.…”

Section: Modeling Of Combined Impact and Blast Loading On Reinforced mentioning

confidence: 99%