An Investigation on Low Velocity Impact Response of Multilayer Sandwich Composite Structures

Figure 4

Contact forces of the different locations of internal sheet: (a) Case 1: EPP-EPP; (b) Case 2: EPP-PUR; (c) Case 3: PUR-EPP; (d) Case 4: PUR-PUR.

(a)

(b)

(c)

(d)