Cross-scale theory inlcuding spatial and teporal effects
Develop strain gradient viscoelasticity and viscoplasticity theory to characterize the cross-scale effects.
For the cross-scale feature of materials with significant miscrostructural effect, we first developed a strain gradient viscoelasticity thoery (Lin & Wei, 2020) (Lin et al., 2021). Then, we implemented the finite element simulation for the strain gradient viscoelasticity by writing the mixed-finite element code. We also used PINN to implement the strain gradient viscoelastic simulation (in preparation). In the meantime, we developed a strain gradient visco-plasticity theory to extend the cross-scale theory (Liu et al., 2026).
Figure Caption: The miscrostructures of many structures or materials.