6-172 



DESIGN OF LAMINATES 



and the unit load is: 



w Eih3 



P = = r 



0.155 K x a u 



(6. 65) 



To obtain K]_ from Fig. 6-50a the following constant must be determined: 



% 



Eo 



1 



(6.66) 



The maximum bending moment at the center of the span is obtained from the graph, 

 Fig. 6-50b: 



value from graph 



(6.67) 



pa 



and m = pa 2 (value from, graph) 



To obtain the value of —k above from Fig. 6-50b the constant « must be determined: 



6a/ E]E2 



(6. 68) 



K-| - UNI FORM LOAD 

 EDGES SIMPLY 

 SUPPORTED 



K 2 - UNI FORM LOAD 

 EDGES CLAMPED 



l/* 



a. CONSTANTS FOR DEFLECTION 



REFERENCE S 



^2 



1/4 



b. BENDING MOMENT AT CENTER OF PANEL 



Fig. 6-50. Curves of Deflection and Bending Moment Constants for 

 Flat Rectangular Panels - Small Deflections 



