A new phenomenological constitutive model for thermoplastics

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 able different phases consideration effect strain, strain rate temperature. Although basic trends tensile compressive PEEK PC materials different, can be used represent these effectively. addition, results show gives favourable prediction material at high Compared Johnson-Cook, Nasraoui et al., Duan-Saigal-Greif-Zimmerman (DSGZ) Mulliken-Boyce models, presents an improved level accuracy on wide range deformation