A steel hub of 100 mm internal diameter and uniform thickness of 10 mm was heated to a temperature \[300{}^\circ C\] to shrink-fit on a shaft. On cooling, a crack developed parallel to the direction of the length of the hub. Consider the following factors in this 1. Tensile hoop stress 2. Tensile radial stress 3. Compressive hoop stress 4. Compressive radial stress The cause of failure is attributable to:

A steel hub of 100 mm internal diameter and uniform thickness of 10 mm

1.	A steel hub of 100 mm internal diameter and uniform thickness of 10 mm was heated to a temperature \[300{}^\circ C\] to shrink-fit on a shaft. On cooling, a crack developed parallel to the direction of the length of the hub. Consider the following factors in this 1. Tensile hoop stress 2. Tensile radial stress 3. Compressive hoop stress 4. Compressive radial stress The cause of failure is attributable to:
A.	1 alone
B.	1 and 3
C.	1, 2 and 4
D.	2, 3 and 4
Answer» B. 1 and 3

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A steel hub of 100 mm internal diameter and uniform thickness of 10 mm was heated to a temperature \[300{}^\circ C\] to shrink-fit on a shaft. On cooling, a crack developed parallel to the direction of the length of the hub. Consider the following factors in this 1. Tensile hoop stress 2. Tensile radial stress 3. Compressive hoop stress 4. Compressive radial stress The cause of failure is attributable to:
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