10,000 I I I I I I I I

 E3 = 6, 15, 35
 \ E4 = .35, 10, 200
 All Modull are in ksi


 1,000
 E2 =10
 El
(ksi)



 A\
 100 E2 =85






 10 I I I I I I I I I I I
 0.01 0.1 1.0 10
 D1 D4 milss)


Relationship Between E and Di D4 for t, = 3.0 in.


Figure 4.14