Fig. 1

Macroscopic images showing an example of the two designs analysed: (a and b) the back and front sides of the Trident I shell and (c and d) the back and front sides of the Trident II shell
Macroscopic images showing an example of the two designs analysed: (a and b) the back and front sides of the Trident I shell and (c and d) the back and front sides of the Trident II shell