A framework for development of constitutive models based on semi-micromechanical aspects of plasticity is proposed. The resulting of this model for material employed friction type failure criterion, sub-loading surface, and associated flow rule. This model is capable of predicting effects of the rotation of principal stress/strain axes and consequent plastic flow, induced anisotropy of strength...

This paper presents a magnetostrictive in-pipe impact drive mechanism (IDM). To estimate the output performances of the IDM, a dynamics model was developed based on the magnetostrictive material constitutive model and mechanical model of the IDM. Therefore, an experimental system has been built to test the motion performance of IDM. Simulation and experimental results illustrate that the propos...

A new phenomenological constitutive model is proposed to predict the mechanical behaviour of thermoplastics in current research. The and method determine parameters are introduced. In model, a transition function enable smooth flow stress behaviours under both small-strain large-strain conditions. validating with testing data Polyetheretherketone (PEEK) Polycarbonate (PC), it found that this ab...