Structural protection for stationary/mobile tactical behaviour 2001

The activities for the project "Structural protection for stationary-mobile behaviour" during 2001 are reported here. The activities focus on the use of advanced material models and numerical simulations to describe structural behaviour during dynamic events, penetration in concrete and penetration of steel armour. Numerical simulations of benchmark test with 152 mm projectiles were performed with the use of the RHT concrete model were performed. Comparisons are made between simulations performed with different element formulations (Lagrange, Euler and SPH), and the strengths as well as weaknesses of the formulations are discussed. The concrete model developed by "Karagozian and Case" (K&C) was used for simulation of structural response, and the numerical results were compared with earlier test results from a series of impact loaded reinforced concrete beams. Dynamic material testing to obtain the equation of state for high performance concrete (HPC) was conducted at EMI. The obtained material properties from the tests give an opportunity to perform more accurate simulations of concrete penetration in the future. A study of the possibilities to determine penetration depths and ballistic limits for steel with the use of numerical models was conducted. The result from the simulation is in good agreement with the ballistic limit for the steel obtained by experiments.