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Through providing this software to the Simtk community, we hope to expand the application of FAST4 to other fields where it may be useful.

FAST4 is a program that performs analysis of general axi-symmetric shell structure for both thick and thin shells. Through specifying the physical properties of a system including material properties and geometrical variations, the resulting mechanical changes on the system from a stimulus can be computed. Mechanical changes of the system such as stress, strain, and displacement data are included in an output file and may be used to visualize how the system responds to the stimulus.