Normal stress which acting on straight beam due to axial force will has maximum value on the plane perpendicular to axis because the plane has smaller area than other planes. The following below is the equation of normal stress due to axial force:
σ = P / A
Where:
A = plane area
P = normal force
σ = normal stress
The following below is figure that show normal stress due axial force.
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| Figure 1: Normal Stress due to Axial Force |