Simulation of Fatigue Performance of Stabilized Soil Road Based on Field Humidity and Damage Density

Abstract:

To effectively investigate the fatigue performance of stabilized soil base， a framework combining analytical models and numerical simulations that considers field humidity distribution was proposed in this paper. First， based on the solution of equilibrium matric suction and the estimation of the resilient modulus， the nonlinear mechanical properties of the material caused by stress dependence and moisture sensitivity inside stabilized soil roads were characterized. Subsequently， based on the energy-based mechanistic（EBM） approach and the damage mechanics theory， the fatigue performance simulation of unsaturated stabilized soil was constructed. Finally， the PDE-FE method in Comsol Multiphysics was used to conduct the multi-field coupling simulation analysis of the fatigue performance of unsaturated stabilized soil base. The results show that the framework proposed could effectively simulate the fatigue damage analysis of stabilized soil base under field humidity distribution.

Key words:stabilized soil base;field humidity;fatigue cracking;damage density;multiphysics-based simulation