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    Dynamic characteristics and damage model of freezing thawing red sandstone under impact load by Yang YU, Qincai JIANG, Zehua WANG, Yuyin LU, Qixiang GUO, Huiming ZENG

    Published 2025-05-01
    “…Based on the D-P failure criterion, a damage evolution equation considering the damage threshold is derived, which is more reasonable. Based on the Zhu−Wang−Tang constitutive model, a viscoelastic plastic dynamic constitutive equation for constructing damaged bodies is introduced, reflecting the comprehensiveness of the constitutive model; the dynamic constitutive model established in this article well reflects the complex characteristics of damage softening, viscoelasticity, and viscoplasticity exhibited by red sandstone during load deformation, and also reflects the influence of freeze-thaw damage on the dynamic mechanical properties of red sandstone; the conclusions obtained can provide reference for studying the dynamic impact failure of rocks in seasonal high-altitude and cold regions.…”
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