“…The values of n are in the range of 2.0-3.2, except for neat PPS at 90 • impingement angle (n = 1.38). The influence of impact velocity on erosion rate of polymer composites has been investigated to limited extent [2,18,30,[34][35][36]. According to Pool et al [34], for polymeric materials behaving in ductile manner, typically 2 < n < 3 while for polymer composites behaving in a brittle fashion, typically 3 < n < 5.…”