Engineering and Construction

Strength of Materials

‘l‘wenty-five feet of steel strapping is coiled in a flat 10 inch by 10 inch box The strapping is 1
inch wide and 0.0625 inch thick. (“llint‘ Assume the coil can be approximated by concentric
hoops with no gaps between them.)

Determine
a. The bending moment at the outer most coil
b. The maximum bending stress at the outer most coil
c. The bending moment at the inner most coil
d. The maximum bending stress at the. inner most coil
e. lfthe yield strength is 36 ksi, what is the minimum diameter the strapping could be coiled
without causing permanent deformation?
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