11
Figure 7: Relationship between stress-strain behavior and cushion curve performance.
A) Resulting cushion curve generated from individual shock pulses at varying static stresses,
B) Stress-strain plot with individual shock events corresponding to each drop indicated in all
three regions of the foam's behavior.
0
100
200
300
400
500
G's
Pulse Duration
Increasing Static Stress
0 0.01 0.02 0.03 0.04 0.05 0.06
0
200
400
600
800
1000
-f
NL
(N)
-f
NL
(N)
-f
NL
(N)
−u (m)
III I II
0 5
x 10
−3
0
50
100
-u(m) -u(m)
Close up of Region
0.058 0.059 0.06
1000
2000
3000
4000
5000
6000
Region III Section Not Shown
A
B
The global distribution network has opened the door for
the development of packaging tools capable of predicting
packaging response numerically rather than relying on
traditional trial-and-error testing methods. These new
developments in the areas of dynamic modelling provide
time-saving and cost-effective design tools for packaging
engineers seeking optimum performance and protection for
products and the environment.
