Cyclic viscoplasticity of high-density polyethylene: Experiments and modeling

A constitutive model is derived in viscoplasticity of semicrystalline polymers at isothermal three-dimensional cyclic deformations. Material constants in the stress-strain relations are found by fitting the experimental data. Good agreement is demonstrated between the observations and the results of numerical analysis. Some interesting phenomena are revealed by means of numerical simulation of cyclic deformations.