Tutorial 3

Dear Students,

Here the link for Tutorial 3a . Please try to do this. Futher tutorial will be posted.

Tips to answer assignment:

1) what is the ratio between hoop stress and longitudinal stress with relation to pressure p? σhoop/σlong=?

2) largest tensile force supported by the filament can be expressed as F=?

3) the corresponding tangential force Ft  can be expressed as ?

4) the filament cross sectional A can be expressed as ?

5) σ hoop can be expressed as Ft/A ,therefore combine step (3) & (4) what will be new equation?

6) new equation for σlong?

7) optimum helix angle can be calculated from combination of step (1) , (5) & (6)

good luck