Damage Characterization of Polypropylene Honeycomb Sandwich Panels Subjected to Low-Velocity Impact

Figure 5

Load versus time plots for sandwich panels subjected to (a) 15 J, (b) 30 J, and (c) 45 J of impact energies. Point 1: upper skin failure; point 2: penetration at impact region.

(a)

(b)

(c)