For the following laminates, assume that each ply is 0.18 mm thick and has the following properties:
E1 = 109 GPa, E2 = 14 GPa, G12 = 5.7 GPa, 𝜈12 = 0.28
a) Showing all the steps, compute the ABD stiffness terms for the following beams:
i) [0/90]s
ii) [90/0]s
iii) [0/90/0/90]
b) Based on the ABD matrix, which one is stiffer under axial loads? Which one is stiffer under bending loads? Why?
c) Which laminate has a non-zero value for B? What does this mean?