Sandwich panels. An aircraft quality sandwich panel has the characteristics listed in the table. (a) Use the data and equations 12.30, 12.31 and 12.32 of the text to calculate the equivalent density, flexural modulus and strength. (b) Plot these on a copy of a Modulus - Density, a Strength - Density and Modulus - Strength chart (Figures 3.3, 3.4 and 3.5). Do the flexural properties of the panel lie in a region of property space not filled by monolithic materials? Data for glass fiber / aluminum honeycomb sandwich panel Face material Core material Panel weight per unit area, me Panel length, L Panel width, b Panel thickness, d Flexural stiffness El Failure moment Mf 0.38 mm glass fiber / epoxy 3.2 mm cell, 97.8 kg/m , 5052 Alu honeycomb 2.65 kg/m² 510 mm 51 mm 10.0 mm 67 N.m 160 Nm
