This work aims at studying the dynamics of strain localization associated with Lüders instability in mild steel under monotonic, uniaxial tensile testing using full field measurement techniques such as infrared thermal imaging and digital image correlation. Based on the spatiotemporal evolutions of temperature and strain an enhanced understanding on the Lüders deformation behavior is achieved by addressing band nucleation and propagation, band growth mechanism, inhomogeneity in stress, strain and strain rate distributions within the band and the thermomechanical coupling associated. The experimental results are also compared and explained with some of the proposed models and concepts on Lüders instability.
Lüders band Thermomechanical coupling Strain rate field Stress-strain distribution Band growth mechanism
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