A cylindrical pressure vessel 8 m long, 4 m in diameter exploded at an internal
pressure of 10 MPa. The vessel is made from 20 mm thick steel with modulus of
elasticity 210 GPa, yield strength 1.2 GPa and surface energy of 120 kJ/m2
. Show
that a conventional strength of materials analysis is not consistent with the fact, but
the failure is compatible with the existence of a longitudinal crack of about 10 mm
long.
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