Page 265 - Mechanics Analysis Composite Materials

250 Mechanics and ana1y.si.s of composite materials

Fig. 5.16. Composite sandwich rings with foam core.

the facings are assumed to be infinitely high. For the laminate shown in Fig. 5.17
this means that
A!! = 0, mn = 11, 12, 14,24,44,

A::,? -+ m, mn = 55,56,66 .

As a result, coefficients in Eqs. (5.29) become

where niiz = 11, 12, 22, 14, 24, 44. Transverse shear stiffnesses, Eqs. (5.31), for an
orthotropic core, can be presented in the form

tZ

t, =

J
Y

Fig. 5.17. Sandwich laminate with two laminated facings (1 and 3) and foam core (2).