Question

In a structure subjected to fatigue loading, the minimum and maximum stresses developed in a cycle are 200mpa and 400mpa respectively. The value of stress amplitude (in mpa) is

Answer 1

Answer:

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Answer 2

Explanation:

The bending stress is zero at the neutral axis. When the load is acting downward, the bending stress is compressive above the neutral axis of section and tensile below it and these are denoted by σbc.cal and σbt.cal respectively. The bending stress is maximum at the extreme fibre