Numerical simulation of the structural relaxation characteristics of K-LCV161 glass

Abstract Only a few glass structure relaxation parameters are applicable for finite element simulation. The structural relaxation characteristics of K-LCV161 glass were described using the Tool–Narayanaswamy–Moynihan (TNM) model in multiple differential scanning calorimetry(DSC) experiments. First, the proposed method of narrowing the fitting parameter range was based on the influence of TNM model parameters on DSC curve. The position of the DSC curve peak is affected by changing Δ h * / R and A, the height of the DSC curve peak is affected by changing x and β. The least squares fitting method to solve the TNM model parameters was then systematically presented systematically presented, and the following results were obtained: ∆h*/R = 52,394.91 K, A = 6.15e−31 s, x = 0.77, β=0.70. Finally, the volume change of K-LCV161 glass during cooling was predicted by using the thermal expansion and structural relaxation models, and the difference between these two models was approximately 23%.