In a structure subjected to fatigue loading, the minimum

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

1. 110
2. 120
3. 100
4. 200

Correct Option: C

σ_min = 200 MPa
σ_max = 400 MPa

σ_a =	σ_max - σ_min
	2

=	400 - 200
	2

= 100 MPa