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A dual-time-scale softening constitutive modeling and parameter inversion for frozen coarse-grained soil
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李
L
J
D
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DOI：10.1016/j.coldregions.2026.104976.png)
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Abstract
En 中文
• A dual-time-scale softening constitutive model is developed for frozen coarse-grained soils. • Fast crack-driven softening and slow frictional sliding are represented by parallel relaxation branches with distinct rates and weights. • Three-phase homogenization links sand–gravel–ice load sharing to strain-dependent pre-peak stiffness evolution. • A binary-medium localization scheme uses evolving fracture ratio and strain concentration to update the post-peak tangent modulus. • A projected Adam inversion with multiple restarts provides stable calibration within physically admissible bounds.
Keywords:
dual-time-scale
softening constitutive model
frozen coarse-grained soil
parameter inversion
strain-dependent stiffness
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