Give expressions for the stiffness matrices [A], [B], and [D] for an isotropic material in terms of its thickness, t, Young’s modulus, E, and Poisson’s ratio, ν.
2. Show that, for a symmetric laminate, the coupling stiffness matrix is equal to zero.
3. A beam is made of two bonded isotropic strips as shown in the Figure 4.8. The two strips are of equal thickness. Find the stiffness matrices [A], [B], and [D].
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