Although the prediction of earing in cup drawing process is considerably related to yield surface shape, evolution also essential for final ear form. The bending-unbending issue a fundamental subject occurring on die and punch shoulders. Since stress loading path dependent reversal loadings, conventional hardening models used monotonic conditions bring about inaccurate outcomes predicting ultim...

The objective of this research is to systematically understand how strain-hardening models and phase- temperature-dependent slopes affect the computed residual stresses in single-pass welded joints made widely used structural steel S235. Both experimental methods numerical simulation have been utilized for investigation. results reveal that material plasticity model has a massive effect on pred...

During heating (loading characterised by a progressive increase in strain rate) and cooling decrease numerical tests, performed using Discrete Element codes, granular materials experience phase transition phenomena, named this paper ‘dry liquefaction’ (when from solid the material starts behaving like fluid) resolidification’ (freezing, when fluid solid). The aim of consists reproducing phenome...

The change in near-tip stress field in Small Scale Yielding (SSY) for cracks located at an interface between two materials with different plastic work hardening is investigated. The difference in hardening is termed hardening mismatch, and is quantified through the parameter n, which is the difference in hardening exponent between the two materials. For cracks in elastic-ideally plastic materia...

Drought stress is the main cause of mortality of holm oak (Quercus ilex L.) seedlings in forest plantations. We therefore assessed if drought hardening, applied in the nursery at the end of the growing season, enhanced the drought tolerance and transplanting performance of holm oak seedlings. Seedlings were subjected to three drought hardening intensities (low, moderate and severe) for 2.5 and ...

Strain hardening capability is critical for metallic materials to achieve high ductility during plastic deformation. A majority of nanocrystalline metals, however, have inherently low work hardening capability with few exceptions. Interpretations on work hardening mechanisms in nanocrystalline metals are still controversial due to the lack of in situ experimental evidence. Here we report, by us...