| Demo : Aluminium Sheet |
Description
The yield strength (or stress) of a material is that stress (= load / cross sectional area) in uniaxial tension at which macroscopic plastic strain is initiated. Because the transition from elastic to plastic strain is often continuous, the actual stress value quoted is usually at some defined (eg. 0.2%) level of strain and is determined by the intersection of a line parallel to, and offset from, the initial, linear portion of the stress - strain curve, as shown below.
Why is it important ?
The yield strength is a measure of the loads which may be carried by the product in final service application
How is it measured ?
Most common measurement is by uniaxial tensile testing.