抄録
An analytical method for evaluating the sink mark in rib structures is proposed. In the analysis model, when the shape of the cross section does not change in the longitudinal direction, 2-dimensional time-transient thermal analysis by FDM is used. At the same time, by assuming the fiber elements, and by treating the model as a thermal-elast-plastic strain problem, the growth of the sink mark in the die is theoretically evaluated. In consideration of the P-V-T characteristics of the resin, the analytical results are correlate well with the experimental data.
