DESIGN OF LAMINATES 



6-57 



The necessary physical and mechanical properties for the different laminae are assumed 

 to be the same as for a laminate of the same reinforcement. The values are obtained from 

 Chapter 5. 



Transforming the respective areas of the cloth and mat laminae to equivalent area of a 

 woven roving lamina, the areas as indicated in Fig. 6-36 are obtained. 



0.016" 

 0,060" | 



i=E 



N. A. 

 0.0148" 



Fig. 6-36. Equivalent Laminate 

 A-l = W.R. area = 0.1L,8 x 1.0 = 0.11$ in 2 



A' 2 = Mat area = Ap x — 



(6.38) 



where A 2 = Equivalent area for woven roving lamina. 



A2 = Area of mat lamina 



E-, = Flexural modulus of elasticity for woving roving lamina 



Eo = Flexural modulus of elasticity for mat lamina 



Ao = °- 060 xO.86 x 10 = 0.O6O xO.U75l = 0.0285 in 2 

 2 1.31 x 100 



A' o = Cloth area 



Ao x 

 -> i, 



5a 



1 



Ao = °' 016 x 1,96 , x 10 = 0.016 x 1.0829 = 0.0173 in 2 

 i 1.81 x IOO 



(6.38a) 



