Strain-rate sensitivity (m value)

The increase in stress () needed to cause a certain increase in plastic strain rate (i) at a given level of plastic strain (E) and a given temperature (T). Strain-rate sensitivity = m = A log a@ (A log i).T stress. The intensity of the internally distributed forces or components of forces that resist a change in the volume or shape of a material that is or has been subjected to external forces. Stress is expressed in force per unit area. Stress can be normal (tension or compression) or shear.

Source: The OHIO State University