Stress

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

Stress

Stress ( \(\sigma\) (Greek symbol sigma) ) or ( \(S\) ) is the force per unit area of cross-section.

Stress formula

\(\sigma = \frac{F}{A}\)

Where:

\(\sigma\) (Greek symbol sigma) = stress

\(F\) = force

\(A\) = area

Solve for:

\(F = \sigma A \)

\(A = \frac{F}{\sigma}\;\)

Longitudinal Stress

The stress imposed on the long axis of any shape. It can be either a compressive or tensile stress.

Shear Stress

Shear Stress FORMULA

\(\tau = \eta \cdot \dot {\gamma}  \)

Where:

\(\tau\) (Greek symbol tau) = shear stress

\(\eta\) (Greek symbol eta) = viscosity

\(\dot {\gamma}\) (Greek symbol gamma) = shear rate

 

Tags: Equations for Stress