{"title":"A novel method for imitating true-triaxial stress path with conventional triaxial apparatus","authors":"","doi":"10.1007/s40948-024-00781-x","DOIUrl":null,"url":null,"abstract":"<h3>Abstract</h3> <p>The stress paths of the cylindrical specimen in the <em>p</em>–<em>q</em> stress space by controlling the ratio of the axial and the radial loading is guaranteed to be consistent with the cuboid specimen, a novel method for imitating true-triaxial stress path by conventional triaxial apparatus was presented. Under the condition that <em>p</em> and <em>q</em> were variables and <em>b</em> was constant, the true-triaxial stress paths were realized by conventional triaxial apparatus strictly and easily. Under the condition that <em>b</em> and <em>p</em> were invariants, the <em>b</em> was used to control the ratio of axial and radial loading to ensure <em>p</em> constant, the method can be used to measure the strength on the <em>π</em> plane. If the tests were conducted at the different <em>p</em> with the same <em>b</em>, the critical state line of different <em>b</em> could be obtained. Under the condition that <em>p</em> and <em>q</em> were constant, the proposed method of nonlinear loading with <em>b</em> as a parameter could be used to design the various stress paths of true-triaxial under the condition of deviatoric stress consolidation, and which could be used to determine the deformation and the plastic flow of soil in 3D space. The proposed method could be used to achieve the equivalent stress path in the <em>p–q</em> stress space to obtain the 3D mechanical properties, and the stress path controlled by stress, strain, and a hybrid of stress and strain. Once the software of conventional triaxial apparatus was developed by the novel method, the measuring range of stress paths could be expanded greatly.</p>","PeriodicalId":12813,"journal":{"name":"Geomechanics and Geophysics for Geo-Energy and Geo-Resources","volume":"30 1","pages":""},"PeriodicalIF":3.9000,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geomechanics and Geophysics for Geo-Energy and Geo-Resources","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s40948-024-00781-x","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
The stress paths of the cylindrical specimen in the p–q stress space by controlling the ratio of the axial and the radial loading is guaranteed to be consistent with the cuboid specimen, a novel method for imitating true-triaxial stress path by conventional triaxial apparatus was presented. Under the condition that p and q were variables and b was constant, the true-triaxial stress paths were realized by conventional triaxial apparatus strictly and easily. Under the condition that b and p were invariants, the b was used to control the ratio of axial and radial loading to ensure p constant, the method can be used to measure the strength on the π plane. If the tests were conducted at the different p with the same b, the critical state line of different b could be obtained. Under the condition that p and q were constant, the proposed method of nonlinear loading with b as a parameter could be used to design the various stress paths of true-triaxial under the condition of deviatoric stress consolidation, and which could be used to determine the deformation and the plastic flow of soil in 3D space. The proposed method could be used to achieve the equivalent stress path in the p–q stress space to obtain the 3D mechanical properties, and the stress path controlled by stress, strain, and a hybrid of stress and strain. Once the software of conventional triaxial apparatus was developed by the novel method, the measuring range of stress paths could be expanded greatly.
摘要 通过控制轴向加载和径向加载的比例，保证圆柱试样在 p-q 应力空间中的应力路径与长方体试样一致，提出了一种用常规三轴仪器模拟真实三轴应力路径的新方法。在 p 和 q 为变量、b 为常数的条件下，传统的三轴仪可以严格、轻松地实现真实的三轴应力路径。在 b 和 p 为不变量的条件下，用 b 来控制轴向和径向加载的比例以确保 p 恒定，该方法可用于测量 π 平面上的强度。如果在不同的 p 和相同的 b 下进行试验，就可以得到不同 b 的临界状态线。在 p 和 q 恒定的条件下，所提出的以 b 为参数的非线性加载方法可用于设计偏差应力固结条件下真三轴的各种应力路径，并可用于确定三维空间中土壤的变形和塑性流动。所提出的方法可用于实现 p-q 应力空间中的等效应力路径，从而获得三维力学性能，以及由应力、应变以及应力和应变混合控制的应力路径。一旦利用新方法开发出传统三轴仪器的软件，应力路径的测量范围将大大扩展。
期刊介绍：
This journal offers original research, new developments, and case studies in geomechanics and geophysics, focused on energy and resources in Earth’s subsurface. Covers theory, experimental results, numerical methods, modeling, engineering, technology and more.
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