Table 3: Mean values of test data from double layered aluminum honeycombs.

Specimens	Mean inserting force/kN	Peak force/kN	Combined mean plateau force/kN	MP ratio	Integral displacement/mm	Integral value/J	Absorbing energy levels/J·mm-1
A+A	2.6331	14.6397	11.6128	1.2606	9.5	65.3604	6.8800
A+B	1.1678	8.2447	7.5642	1.0899	13.5	46.2927	3.4291
B+B	0.7692	5.4195	3.3583	1.6137	18.5	43.8296	2.3692