A tensor measure of internal forces that neighbouring particles of a continuum body exert on each other per unit area across which the force is applied.
| Symbol | Dimension | SI units | Oil metric units | Oil field units | Additional |
|---|---|---|---|---|---|
| Pa |
For a given surface element with nor normal vector
the stress is represented by a vector
, showing direction and the value of forces exerted across a given surface element
:
\begin{bmatrix}
T_x \\
T_y \\
T_z
\end{bmatrix} =
\begin{bmatrix}
\sigma_x & \tau_{xy} & \tau_{xz} \\
\tau_{xy} & \sigma_y & \tau_{yz} \\
\tau_{xz} & \tau_{yz} & \sigma_z
\end{bmatrix}
\begin{bmatrix}
n_x \\
n_y \\
n_z
\end{bmatrix} |
where
| Normal stress | Shear stress |
|---|---|
Physics / Mechanics / Continuum mechanics
[ Strain ]