The A36 steel band is 2 in wide and is secured around the sm

The A-36 steel band is 2 in. wide and is secured around the smooth rigid cylinder. If the bolts are tightened so that the tension in them is 400 lb, determine the normal stress in the band, the pressure exerted on the cylinder, and the distance half the band stretches.

I need further explaination on everything. I am very confused. I don\'t need hardcore numbers, i just need guidance on this. I have found answers for this but i dont get where these numbers/ equations are coming from.

Solution

(1) first part of solution: we know stress= Force/Area ; Force= 400lb and Area as given

(2) Second part of the solution its the standard formula for Hoop stress and the formula explains all the terms

(3) Third part of the solution we know Strain= (Change in length)/original length

and also the strain are substituted in terms of strain and youngs modulus