Design a hydrocooling unit that can cool fruits and vegetables from 30 to 5°C at a rate of 20,000 kg/h under the following conditions: The unit will be of flood….
Explain why of length-of-bend to sheet thickness increases.
As noted in Fig. 7.16, the state of stress shifts from plane stress to plane strain as the ratio
of length-of-bend to sheet thickness increases.
Explain why. This situation is somewhat similar to rolling
of sheet metal where the wider the sheet, the
closer it becomes to the plane-strain condition.
In bending, a short length in the bend area
has very little constraint from the unbent regions,
hence the situation is one of basically
plane stress. On the other hand, the greater
the length, the more the constraint, thus event