Energy-structure coupling mechanism and damage evolution model of red sandstone during soaking-softening process.

ABSTRACT: To reveal how different soaking times affect red sandstone's softening characteristics, this study analyzed red sandstone's mineral composition, meso-structure, mechanical properties, and energy evolution laws. A damage constitutive model was established based on mechanical property testing and microstructure determination experiments of rock samples. It considers the initial compaction nonlinear section. The prediction bias in the energy dissipation theory damage model during the compaction stage was corrected based on the correction coefficient. The deterioration of mechanical properties of rock samples is positively correlated with immersion time. The results showed that water soaking caused feldspar, calcite, and other minerals to dissolve. It also reduced clay minerals and made pore d

SUBMITTER: Zhang J 

PROVIDER: S-EPMC12857940 | biostudies-literature | 2026

REPOSITORIES: biostudies-literature