Sandwich Structured Composites for Aeronautics: Methods of Manufacturing Affecting Some Mechanical Properties

Table 3

Measurement results of compressive strength tests.

Method of producing composite	Hand lay-up				Press		Autoclave
Type of panel	T2	T3	M2	M4	P2	P3	A2	A3
modulus at compression, MPa	6.2	9.1	11	11.2	15.4	6.75	11.9	12.5
Standard deviation of modulus, MPa	2.06	3.38	1.34	2.25	2.33	0.315	1.15	1.442
Compressive strength, MPa	0.601	0.589	0.589	0.601	0.627	0.621	0.596	0.610
Standard deviation of strength, MPa	0.0051	0.0424	0.0265	0.0168	0.0182	0.0077	0.0061	0.0122
Deflection, %	2.3	2.4	2.0	2.6	1.2	1.9	1.8	2.3
Standard deviation of deflection, %	0.2	0.5	0.5	0.4	0.6	0.1	0.8	0.6