Table 2: Average impact parameters for sandwich samples with PP honeycomb core impacted at 15, 30, and 45 J for core thicknesses of 20, 40, and 60 mm.

Thickness (mm)Impact energy (J)Max. load (N)Total impact time (ms)Damage area (cm2)Indentation Depth (mm)

20151989.45144.001.5320−5.2761
301726.72236.601.5475−5.3181
451788.98756.801.5559−2.2511

40151597.63574.801.4773−4.6319
301954.52215.201.6559−4.8169
451673.56918.202.1028−5.7358

60151746.46504.001.5667−3.8154
302835.34793.801.4694−4.4013
452704.74275.401.6627−5.7969