Railways Technical Ability Engineering Mechanics and Strength of Materials Question Bank Strength of Materials

  • question_answer          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

    Correct Answer: A


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