DESIGN OF LAMINATES 



6-53 



Fig. 6-34. Bending of Mat Laminate 



Bending Moment M 



PL/ 

 12 



where M = bending moment, in. lbs. 



p = unit load, lbs. per in. 



L = span, in. 



Therefore M = 10 x ill = 120.0 in. lbs. 

 12 



(6. 29) 



The maximum shear on the section is equal to the end reaction: 



v = 2k 



(6. 30) 



where V = maximum shear, lbs. 



and 



V = 10 x — = 60.0 lbs. 

 2 



For the required factor of 4 on the ultimate strength of the laminate, the ultimate 

 moment and shear becomes: 



Mu = h x 120 = U80 in. lbs. 

 Vu = h x 60 = 2U0 lbs. 



The following properties of the mat laminates are obtained from the tables in Chapter 5: 



