A material subject to a pair of opposite forces might deform. If the forces stretch the material, they are tensile. If they squash the material, they are compressive.
- Tensile stress= Force applied / cross-sectional area.
- Units: Nm^-2 OR Pa
- Tensile strain = extension / original length
- Units: it is a ratio so no units!
- Same equations apply whether force is tensile or compressive!
As the force increases, stress increases:
- The atoms get pulled apart from one another.