Uniaxial tensile behaviour modelling of natural-fiber-reinforced viscoplastic polymer using normalized stress-strain curves

摘要

The monotonic uniaxial tensile behaviour of hemp-fiber-reinforced high density polyethylene (HDPE) was investigated at different values of hemp fiber volume fraction (v(f)) and strain rate (.). A normalized stress-strain family of curves was generated. An exponential normalized monotonic model was developed. A general uniaxial monotonic model was developed from the normalized model to simulate the stress-strain relationship at different values of . and v(f). A modified Harris mechanistic model and a linear model were proposed to incorporate the effect of v(f) and the absorbed moisture into the developed model.