Table II

Material data

Engineering constantsGraphite/Epoxy substrateGlass/Epoxy substrateBonding resinKaptonMFC active area
E1 [GPa]67.0725.2742.530.34
E2 [GPa]67.0725.27  15.86
E3 [GPa]67.0725.27  15.86
ν120.0420.1190.40.340.31
ν130.0420.119  0.16
ν230.0420.119  0.16
G12 [GPa]4.784.83  5.51
G13 [GPa]4.784.83  5.51
G23 [GPa]4.784.83  5.51
Density [kg/m^3]1,8522,273  5,440
Dielectric [F/m]    ϵii = 1.64e-8
Piezoelectric [m/V]    d31 = 4.6e-10

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