Modelling mechanical behaviours of polypropylene sheet for incremental forming process using graphic method

This paper presents modelling the mechanical behaviours of polypropylene sheet (PP) at room temperature. The standard linear solid model (SLS) is used to establish the constitutive equation for FEM simulation of incremental forming process for PP. The tensile, relaxation and creep tests are performed to calibrate the constituting model. This model is integrated into Abaqus environment by using a user-material subroutine in Fortran language. The cone model is simulated in this FEM environment and is verified through laboratory experiments with model formed by the incremental forming process. The results show that the established constitutive model has responded well to the mechanical behaviour of PP. There is significant agreement between the simulated model and empirical experiments in terms of the thickness distribution and geometric accuracy.