48 



135 



2.00 



1.80 



1.60 



1.40 



1.20 



5 1.00 



0.80 



0.60 



0.40 



0.20 



0.1 



0.2 



0.3 



0.4 



0.5 



0.6 



0.7 



Proportionole Deflection 



Figure 39 - Pressure-Deflection Curves for Two Sets of Furniture Steel Plates 



"u - '+9,825 pounds per square inch 



Equations [18] and [19] suggest plotting p' = pa/a^h against 4(z/a)-H 

 [1 + {z/a)^] and W' = W/na^ay,h against (z/a)^. This has been done In Figures 

 45 and 46, respectively, for each of the five metals, using average values. 

 The proportionality factor a maj be read from these figures and is seen to be 

 between 0.88 and 1.02 in Figure U5, and between O.8O and 0.95 In Figure 46. 



DISCUSSION OF RESULTS 



Inspection of Figures 38, 39, 40, 4l , and 42 shows that there Is some 

 deviation in the pressure-deflection curves for different plates of a given 

 material. From Figures 38 and 39 It appears that plates, even of the same 

 size and material, exhibit differences. From Figures 39. '+'' . and '+2 it 



