DYNAMICS OF PACKAGE CUSHIONING 



437 



not change Gm . To find the ampUfication factor we must first decide if the 

 package will rebound. With 50% of critical damping, the maximum ac- 



40 



36 



3.2 



2.8 



2.4 



-^3 2.0 

 o ' 



< . 



1.6 



1.2 

 1.0 

 .8 

 .6 

 .4 

 .2 



.10 



13: 



Fig. 3.5.8 — Limiting values of amplification factors for linear damped cushioning with no 

 rebound. wi/c<;2— > «. See equations (3.5.1) and (3.5.2). 



celeration on the first upstroke is 0.164 Gm (see Section 2.6 and Fig. 2.6.1). 

 Then, 0.164 X 90 X 1.5 = 22 lbs. which is less than the estimated weight 

 of the outer container. The package will not rebound and Fig. 3.5.6 

 should be used for the amplification factor. 



