Operant strain-rate sensitivity during tensile necking

Influence on strain-rate history effects on the development of necking instabilities under dynamic loading conditions

“…Woodford (1969) analysed results of uniaxial tensile tests for different materials and observed a correlation between the total elongation at failure and the strain-rate sensitivity of the materials. Several 2 theoretical and computational models have been proposed to rationalise the effect of strain-rate sensitivity on necking (Marciniak et al, 1973;Ghosh, 1977a;Hutchinson and Neale, 1977;Chung and Wagoner, 1988;Wagoner and Wang, 1983;Audoly and Hutchinson, 2019). These studies have shown that a rather small amount of strain-rate sensitivity can significantly delay the occurrence of localised necking.…”