In survivability and weapon effectiveness evaluation it is valuable to predict if explosives detonates if it is penetrated with projectiles, fragments or shaped charges. Initiation or not, depends on the type of explosive, projectile velocity, projectile diameter, the shape of the projectile tip and the attitude angel of the projectile. Further, the projectile density and acoustic impedance will influence. A high projectile velocity and a large diameter will always give a high risk for detonation. Initiation or not, also depend on if the projectile has to penetrated the casing of the explosive. This is the usual situation in practice. The intention with the report is to investigate if it is possible to reproduce some early experiments. Influence from the casing or different projectile shapes have not been investigated. There is a lack of reliable material parameters for many explosives; further, small variations of the explosive will influence the material parameters. This means the simulations is not always reliable. The simulations are useful if relevant material parameters are available.