Question

A thin walled cylindrical pressure vessel having a radius of 0.5 m and wall thickness of 25 mm is subjected to an internal pressure of 700 kPa. The hoop stress developed is

• A. 14 MPa
• B. 1.4 MPa
• C. 0.14 MPa
• D. 0.014 MPa

Answer 1

The correct option is A 14 MPa

Radius, r = 0.5 m

Diameter, d = 1 m = 1000 mm

Wall thickness, t = 25 mm

$\text{Internal pressure, p = 700 kPa = 0.7 MPa}$

Hoop stress,
${\sigma }_h=\frac{pd}{2t}=\frac{0.7\times 1000}{2\times 25}$

$=14$ MPa