Mechanical Properties of Sandwiched Construction with Composite and Hybrid Core Structure

Table 5

The flexural test results for open and closed structures with PLA and TPU.

Materials	δmax (mm)	Pmax (kN)	δy (mm)	Py (kN)	τmax (MPa)	τy (MPa)	σmax (MPa)	σy (MPa)
Open PLA	2.91	0.72	2.18	0.66	0.53	0.49	53.33	49.48
Open TPU	22.48	0.12	20.30	0.10	0.08	0.08	8.88	8.07
Closed PLA	5.95	0.96	5.24	0.89	0.71	0.65	71.11	65.92
Closed TPU	7.26	0.28	6.90	0.26	0.20	0.19	20.74	19.85
PLA–PUR	7.67	1.64	7.00	1.56	1.21	1.15	121.48	115.78
TPU–PUR	7.68	0.72	5.62	0.69	0.53	0.51	53.33	51.48