Ballistic penetration of steel plates

This paper presents a research programme in progress where the main objective is to study the behaviour of Weldox 460 E steel plates impacted by blunt-nosed cylindrical projectiles in the lower ordnance velocity regime. A compressed gas gun is used to carry out high-precision tests, and a digital high-speed camera system is used to photograph the penetration process. A coupled constitutive model of viscoplasticity and ductile damage is formulated and implemented into the non-linear finite element code LS-DYNA, and the material constants for the target plate are determined. The proposed model is applied in simulations of the plate penetration problem and the results are compared with test data. Good agreement between the numerical simulations and the experimental results is found for velocities well above the ballistic limit, while the ballistic limit itself is overestimated by approximately 10% in the numerical simulations.

[1]  N. Jones,et al.  Shear and bending response of a rigid plastic circular plate struck transversely by a mass , 1996 .

[2]  G. R. Johnson,et al.  Fracture characteristics of three metals subjected to various strains, strain rates, temperatures and pressures , 1985 .

[3]  Samuel J. Brown.  Energy Release Protection for Pressurized Systems. Part II: Review of Studies Into Impact/Terminal Ballistics , 1986 .

[4]  M. Langseth,et al.  The behaviour of square steel plates subjected to a circular blunt ended load , 1992 .

[5]  W. Goldsmith,et al.  Yawing impact on thin plates by blunt projectiles , 1995 .

[6]  G. G. Corbett,et al.  Impact loading of plates and shells by free-flying projectiles: A review , 1996 .

[7]  Charles E. Anderson,et al.  Ballistic impact: the status of analytical and numerical modeling , 1988 .

[8]  C. Ruiz,et al.  Impact loading of plates — An experimental investigation , 1983 .

[9]  S. R. Bodner,et al.  Projectile perforation of multi-layered beams☆ , 1979 .

[10]  Jonas A. Zukas,et al.  High velocity impact dynamics , 1990 .

[11]  P. W. Bridgman.  Studies in large plastic flow and fracture : with special emphasis on the effects of hydrostatic pressure , 1964 .

[12]  J. Chaboche,et al.  Mechanics of Solid Materials , 1990 .

[13]  R. Hill.  The mathematical theory of plasticity , 1950 .

[14]  A. Needleman.  Material rate dependence and mesh sensitivity in localization problems , 1988 .

[15]  C. Ruiz,et al.  A comparison of plate perforation models in the sub-ordnance impact velocity range , 1983 .

[16]  T. L. Warren,et al.  Perforation of aluminum plates with ogive-nose steel rods at normal and oblique impacts , 1996 .

[17]  Jean Lemaitre,et al.  A Course on Damage Mechanics , 1992 .

[18]  E. P. Chen.  Numerical Simulation of Shear Induced Plugging in HY100 Steel Plates , 1992 .

[19]  James M. Kelly,et al.  A phenomenological penetration model of plates , 1983 .

[20]  Leonard E. Schwer,et al.  Computational techniques for penetration of concrete and steel targets by oblique impact of deformable projectiles , 1991 .

[21]  G. R. Johnson,et al.  Strain-Rate Effects in Metals at Large Shear Strains , 1983 .

[22]  R. L. Woodward,et al.  Penetration of targets by flat-ended projectiles , 1976 .

[23]  T. W. Ipson,et al.  Ballistic Perforation Dynamics , 1963 .

[24]  J. Hawkyard,et al.  The mean dynamic yield strength of copper and low carbon steel at elevated temperatures from measurements of the “mushrooming” of flat-ended projectiles , 1968 .

[25]  J. D. Embury,et al.  A model of ductile fracture based on the nucleation and growth of voids , 1981 .

[26]  S. R. Bodner,et al.  Experimental Investigation of Normal Perforation of Projectiles in Metallic Plates , 1974 .

[27]  Werner Golsdmith,et al.  Penetration and perforation processes in metal targets at and above ballistic velocities , 1971 .

[28]  Werner Goldsmith,et al.  Plate perforation phenomena due to normal impact by blunt cylinders , 1984 .

[29]  J. A. Zukas,et al.  Mechanics of penetration: Analysis and experiment , 1978 .

[30]  S. R. Bodner,et al.  Dynamic perforation of viscoplastic plates by rigid projectiles , 1983 .

[31]  S. R. Bodner,et al.  Analysis of the mechanics of perforation of projectiles in metallic plates , 1974 .

[32]  Ted Belytschko,et al.  A three-dimensional impact-penetration algorithm with erosion , 1987 .

[33]  Werner Goldsmith,et al.  The mechanics of penetration of projectiles into targets , 1978 .