Deformation and fracture of a long-rod projectile induced by an oblique moving plate: Numerical simulations

作者：Liden E^*; Mousavi S; Helte A; Lundberg B

来源：International Journal of Impact Engineering, 2012, 40-41: 35-45.

DOI：10.1016/j.ijimpeng.2011.09.003

• Reactive armour
• Oblique plate
• Long-rod projectile
• Fracture model
• Numerical simulation

Simulations have been performed to evaluate the possibility of reproducing the fragmentation of a long-rod projectile impacted by a moving oblique plate. When the moving plate slides along the projectile, fractures due to shear loading may occur in the projectile. Therefore, a fracture model suggested by Xue-Wierzbicki was used for the projectile together with the Johnson-Cook strength model. This fracture model is based on an equivalent plastic strain of fracture which depends on a stress triaxiality and a deviatoric stress parameter. The results of the simulations were compared with experimental results of a preceding study in which the impact conditions were varied in such a way that the projectile fractured in some but not all tests. The comparisons show that the simulations reproduced the fractures in the projectile well. Also, the transition from a deformed non-fractured to a severely fractured projectile was captured. The benefit of including the deviatoric stress parameter and the mechanisms leading to fragmentation of the projectile are discussed.

• 出版日期2012-3