We posited that the grain size dependence of tensile necking stress, as determined by Considère criterion for plastic instability, is a more meaningful characteristic Hall–Petch (H–P) effect than yield stress or 0.2% proof stress. An inverse square-root on was derived from dislocation dynamics-based constitutive model. In this model, enters indirectly via evolution density. Model predictions we...

Abstract Oxide glass, one of the most transformative materials in modern world, breaks easily under load due to its brittleness. Using classical molecular dynamics simulations, we prepared amorphous alumina by consolidating glass nanoparticles at room temperature. We showed that consolidated exhibits work hardening ability, hence deforms homogeneously and fractures via necking tension, while ob...

Due to surface tension, a beading instability takes place in long enough fluid column that results the breakup of and formation smaller packets with same overall volume but area. Similarly, soft elastic cylinder under axial stretching can develop an if tension is large enough. This occurs when force reaches maximum fixed or force. However, unlike situation fluids where develops finite wavelengt...

Many studies have presented stress-strain relationship of human hair, but most of them have been based on an engineering stress-strain curve, which is not a true representation of stress-strain behaviour. In this study, a more accurate 'true' stress-strain curve of human hair was determined by applying optical techniques to the images of the hair deformed under tension. This was achieved by app...

Transformation induced plasticity (TRIP) steels present a remarkable balance of strength and ductility. However, their post-necking hardening behavior, which is required for press-forming automobile crash simulation, unreliable because stress-triaxiality dependency. Therefore, we analyzed the in strain regions tensile loaded TRIP steel to accurately evaluate stress distribution. Tensile tests w...