An energy-based method for uniaxially compressed rocks and its implication

• DOI: 10.1016/j.jrmge.2024.07.002
• Publication Date: 2024-07-17T23:59:07Z
• Authors: Yong Luo; Jiancheng Huang; Xuefeng Si; Feng Lin; Wuxing Wu
• Keywords: Damage threshold; Energy evolution; TA703-712; Energy storage efficiency; Engineering geology. Rock mechanics. Soil mechanics. Underground construction; Calculation method of peak energy density

To obtain the precise calculation method for peak energy density and evolution properties of rocks subjected to uniaxial compression (UC) before post-peak stage, particularly at σ ≥ 0.9σc (σ denotes stress is strength), extensive UC graded cyclical loading-unloading (GCLU) tests were performed on four rock types. In GCLU tests, unloading levels designated when < six 0.9σc. The variations in elastic (), dissipative storage efficiency (C) types under analyzed. Based variation , a calculating was proposed. condition stage examined. relationship between C0.9 (C ) mechanical behavior explored, damage analyzed view energy. Compared with that three existing methods, accuracy proposed this study higher. These findings could provide theoretical foundation more accurately revealing failure from an perspective.