This paper presents a methodology to simulate the strain-softening-hardening response of sensitive clays when subjected extensive remoulding. A non-local strain-softening technique is implemented into Abaqus Finite Element Analysis (FEA) software through its user defined material subroutine UMAT, in form critical state based constitutive model. For comparison conventional and formulations, seri...

Abstract The mechanical behaviours of microalloyed and low-carbon steels under strain reversal were modelled based on the average dislocation density taking into account its allocation between cell walls interiors. proposed model reflects effects dislocations displacement, generation new their annihilation during metal-forming processes. back stress is assumed as one internal variables. value i...

There is a need to establish complete process characterize Ultra-High-Performance Fiber-Reinforced Concrete (UHPFRC) in both strain-hardening and strain-softening tensile behavior. This should be simple easy apply so that its application direct. Therefore, this paper presents the development of obtain constitutive parameters UHPFRC. A simplified inverse analysis based on four-point bending test...

Abstract. In this study the yield point phenomenon in Bake-Hardening grade steel is predicted using a physically based thermo-mechanical model. A modified Taylor equation proposed with dislocation density evolution approach. The softening that follows higher incorporated Voce type decaying exponential function. strain rate dependency of plastic hardening also decay function dependent but does n...

The mechanical properties of materials are highly sensitive to the content impurities and point defects due their interaction with plastic deformation carriers-dislocations. This opens up possibility some extent control through alloying creating solid solutions. In a number crystalline materials, in addition well-known solid-solution strengthening region low concentration solution atoms, opposi...

An argument is presented for discontinuing the term ‘contraction’ when describing the so-called active state of muscles and replacing it with a neutral term such as ‘hardening’. The opposite state of the muscle would be called ‘softening’. Hardening as a so-called active state of a muscle may be accompanied by lengthening, shortening, or no dimensional change in the anatomical muscle, depending...