A spherical steel pressure vessel 400 mm in diameter with a wall thickness of 20 mm, is coated with a brittle layer that cracks when strain exceeds100 x 10-7. What internal pressure will cause the layer to develop cracks? (E = 200 GPa, µ = 0.3)

A spherical steel pressure vessel 400 mm in diameter with a wall thick

1.	A spherical steel pressure vessel 400 mm in diameter with a wall thickness of 20 mm, is coated with a brittle layer that cracks when strain exceeds100 x 10-7. What internal pressure will cause the layer to develop cracks? (E = 200 GPa, µ = 0.3)
A.	0.057 MPa
B.	5.7 MPa
C.	0.57 MPa
D.	57 MPa
Answer» D. 57 MPa

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A spherical steel pressure vessel 400 mm in diameter with a wall thickness of 20 mm, is coated with a brittle layer that cracks when strain exceeds100 x 10-7. What internal pressure will cause the layer to develop cracks? (E = 200 GPa, µ = 0.3)

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