Low-velocity impacts causing barely visible impact damage are considered to be one of the most dangerous types of composite loading due to the unpredictability of structural strengh loss and non-trivial requirements for non-destructive testing. A conventional “black metal” composite constructions are especially susceptible to this damage due to large composite surface areas. A proper protection of these areas from low-energy impact damage would increase the specific weight and remove the main advantage of modern aircraft composites. The frame concept of aircraft fuselage uses composite rods instead of wide panels. Composite rods made of unidirectional fiber composite are easier to protect and to model. In this research, we use the grid-characteristic numerical method that allows to model elastic wave fronts in anisotropic materials and implement various brittle damage models for composites. Several types of protection caps are considered for a wide range of velocities and masses of strikers.