366 



BELL SYSTEM TECHNICAL JOURNAL 



with displacement) the following procedure may be used for estimating the 

 effectiveness of the cushioning. 



130(0) - 



100(0) - 



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CS 9 



Fig. 1.4.7- — Family of load displacement curves for cushioning with tangent elasticity. 



a. Select the point on the load-displacement curve for which the load 

 is equal to the weight of the packaged item multiplied by the allowable 

 Gm . Call this load P9. and the corresponding displacement d^ . 



