2.1 Volume and Mass Fractions 2.2 Density and Void Content 2.3 Prediction of Elastic Constants (Longitudinal & Transverse Modulus, Major Poisson’s Ratio, In-plane Shear Modulus) 2.4 Mechanics of Materials Approach vs. Elasticity Solutions 2.5 Semi-Empirical Models (Halpin-Tsai)

[ \nu_12 = \nu_f V_f + \nu_m V_m ]

6.1 Core Materials (Honeycomb, Foam, Balsa) 6.2 Face Sheet Materials 6.3 Flexural Rigidity of Sandwich Beams 6.4 Failure Modes (Face Wrinkling, Core Shear, Indentation) 6.5 Design Optimization