Model-Based Experimental Development of Passive Compliant Robot Legs from Fiberglass Composites

Table 4

The estimated and measured elastic modulus of the 6-layer composites.

Type	D222-0	D222-45	D222-90
Estimated (GPa)	9.45	13.42	18.80
Test #1	10.34	12.85	19.06
Error (%)	9.38	4.26	1.37
Test #2	9.55	13.68	20.19
Error (%)	1.03	1.92	7.37
Test #3	10.20	13.92	18.76
Error (%)	7.92	3.77	0.21
Mean	10.03	13.48	19.34
STD	0.42	0.56	0.75
Average error (%)	6.14	0.47	2.85