Predictive penetration simulation model for SUS316L thin plate near the ballistic limit

초록

In this paper, experimental and numerical investigation are conducted on the penetration behavior near the ballistic limit for 316 L stainless steel thin plates (1.2 mm) tested using a cylindrical bullet with a rounded nose. The plate condition (deformation or penetration) and fracture surface were observed in experiment. Although not experimentally measured, the residual velocity was simulated through numerical simulation. For numerical analysis, explicit FE simulation was performed using the Johnson-Cook hardening and fracture strain model. The model parameters are determined from notched bar tensile tests at different temperatures and strain rates. Simulation results for plate conditions and remnants of back surface show good agreement with experimental observation. Key parameters in the numerical simulation, such as the element size, friction coefficient, and adiabatic heating, are also discussed.

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