A NEW MODEL FOR THE PULL-OUT OF SINGLE FIBERS FROM LOW-DENSITY POLYETHYLENE

Based on the observation and interpretation of single-fibre pull-out r esults of E-glass fibre from low density polyethylene, a new theoretic al model, incorporating the concepts of critical transition length, ul timate shear strength and a deduced stress distribution, was developed to predict the relationship between the debonding force and embedded fibre length for a well-bonded interface. With reasonable values of mo del parameters, better consistency between the new model and experimen tal results was achieved, compared with other existing models. The com plete contribution of friction to debonding force was conclusively dem onstrated to be insignificant compared with the contribution of plasti c deformation.