文献类型：期刊文献

英文题名：Mechanical response and failure analysis of similar materials considering moisture conditions and pore structure

作者：Wang, Yuliang Shang, Yuqi Kong, Dezhong He, Lu

第一作者：Wang, Yuliang

机构：[1] School of Energy and Mining Engineering, China University of Mining and Technology [Beijing], Beijing, 100083, China; [2] Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China; [3] College of Mining, Guizhou University, Guiyang, 550025, China; [4] School of Mining Engineering, Guizhou Institute of Technology, Guiyang, 550003, China

第一机构：School of Energy and Mining Engineering, China University of Mining and Technology [Beijing], Beijing, 100083, China

通信机构：Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China

年份：2025

卷号：491

外文期刊名：Construction and Building Materials

收录：EI(收录号：20252918819683);Scopus(收录号：2-s2.0-105010860081)

语种：英文

外文关键词：Compressive strength - Crack propagation - Degradation - Failure (mechanical) - Failure analysis - Microcracks - Moisture - Numerical models - Pore structure - Safety engineering - Saturation (materials composition) - Slope stability - Structural design

摘要：The mechanical properties and failure behavior of analogous modeling materials critically influence the outcomes of physical model tests, which are significantly governed by pore structure and moisture conditions. In this study, a series of uniaxial compression tests and numerical simulations were conducted on artificially prepared analogous material specimens to systematically investigate the effects of Water ratio, Porosity, and Saturation on strength evolution and failure mechanisms. The results indicate that the Water ratio predominantly induces a nonlinear reduction in strength by softening particle interfaces and promoting crack propagation. As the Water ratio increased from 0 % to 17.9 %, the compressive strength decreased from 5.6 MPa to 1.6 MPa, with the Strength degradation rate (Ds) reaching 71.4 %. Porosity exhibited a strong negative correlation with uniaxial compressive strength due to the weakening of load-bearing structures and the initiation of microcracks. When Porosity increased from 0 % to 7.12 %, compressive strength reduced to 2.4 MPa, and Ds increased to 57.1 %. In contrast, the effect of Saturation on material strength exhibits a non-monotonic behavior, showing a dual impact of "enhancement–degradation". As Saturation rose from 0 % to 88 %, compressive strength increased from 1.9 MPa to 4.1 MPa, followed by a slight decrease to 3.7 MPa at full saturation (100%). Furthermore, numerical simulations closely matched the experimental results in terms of strength trends, revealing the coupled evolution of microcrack propagation and strength degradation. These findings provide theoretical guidance for material design, moisture regulation, and structural safety assessments in analogous modeling tests under hydro-mechanical coupling conditions, with potential applications in tunnel engineering, karst geology, water-related hazards, and slope stability projects. ? 2025 Elsevier Ltd