What is typically measured in N/mm²?

The unit N/mm² is a measure of stress, which is defined as the force applied per unit area. It quantifies how much force is distributed over a given area of a material when subjected to load. This is crucial in engineering as it helps in assessing whether a material can withstand a particular load without deforming or failing.

Stress is calculated using the formula:

[

\sigma = \frac{F}{A}

]

where ( \sigma ) is the stress, ( F ) is the force applied, and ( A ) is the area over which the force is distributed. The resultant units are in Newtons (force) divided by square millimeters (area), leading to N/mm².

While tensile strength, strain, and modulus of elasticity are important concepts in material science and mechanics, they are expressed in different units or contexts. Tensile strength refers to the maximum stress a material can withstand while being stretched or pulled before failing, but it is also measured in N/mm², making it sometimes misleading in this context. Strain is a dimensionless ratio and does not have units, as it represents the deformation of a material relative to its original length. The modulus of elasticity, which measures a material's stiffness