Abstract:To reproduce the containment process of composite fan casing impacted by composite fan blade during blade out event, a series of ballistic impact simulations of triaxial braided composite panel by composite blade-like projectile with yaw angle are conducted based on the continuum damage mechanics model in commercial finite element codes ANSYS/ LS-DYNA. Numerical results indicate that for the yaw impact, the residual kinetic energy of projectile decreases and the absorbed energy of target increases with the increase of yaw angle, which is mainly caused by the enlargement of impact influence area. Ballistic impact simulations are also conducted with titanium blade-like projectile with the same weight and geometry except the thickness. It is found that the titanium projectile is easier to perforate the target than the composite projectile, so the employment of composite fan blade can provide the additional benefits of casing weight reduction besides its own weight reduction, which is very promising in aero-engine industry.