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Units

In Metafor, as in most FE codes, units are not explicitly defined. The user must enter input data in a consistent way.

SI SI (mm)
Length m mm
Force N N
Mass kg tonne
Time s s
Stress Pa (N/m2) MPa (N/mm2)
Energy J \mbox{mJ } \left ( 10^{–3} \mbox{J} \right )
Density \mbox{kg/m³} \mbox{tonne} / \mbox{mm}^3

For example, if the geometry (point coordinates) is expressed in meters and the boundary conditions (loads) in Newton, the Young's Modulus appearing in the material definition must be expressed in \mbox{N/m}^2. Likewise, a geometry in meters and a Young's Modulus in \mbox{kg/m}^2 lead to forces in \mbox{kg}.