DEM study on the impact mechanical properties and failure characteristics of frozen soil under coupled compression–shear loading

IF 2.8 3区工程技术 Q2 MECHANICS

International Journal of Non-Linear Mechanics Pub Date : 2025-02-08 DOI:10.1016/j.ijnonlinmec.2025.105039

Lijun Zhang , Zhanfan Chunyu , Zhiwu Zhu , Longjiang Hou , Zhengqiang Cheng , Shuai Zhang

{"title":"DEM study on the impact mechanical properties and failure characteristics of frozen soil under coupled compression–shear loading","authors":"Lijun Zhang , Zhanfan Chunyu , Zhiwu Zhu , Longjiang Hou , Zhengqiang Cheng , Shuai Zhang","doi":"10.1016/j.ijnonlinmec.2025.105039","DOIUrl":null,"url":null,"abstract":"<div><div>It is important to study the effects of the mechanical properties and failure characteristics of defective frozen soil under coupled compression–shear loading for engineering construction safety and disaster prevention. In this study, the particle flow code was used to establish the distinct element method (DEM) model of a split-Hopkinson pressure bar experiment on frozen soil. The failure processes of frozen soils with different tilting angles and holes were simulated using the DEM model to investigate the influence of the tilting angle and hole deviation (deviation from the geometric center of the frozen soil specimen) on the impact mechanical properties and failure characteristics of frozen soil specimens under coupled compression–shear loading. The results of numerical simulation indicated that when the tilting angle and impact strain rate were 0° and 100 s<sup>−1</sup>, the axial peak stress of frozen soil specimen with a hole was smaller than that without a hole, the hole deviation had a minor influence on the axial peak stress. When the strain rate was 100 s<sup>−1</sup>, the axial and shear peak stresses of the frozen soil specimen without a hole increased and decreased, respectively, with increasing tilting angle, and the number proportion of shear-cracks also increased. When the tilting angle and strain rate were 60° and 100 s<sup>−1</sup>, the fully deviated hole had a minor influence on the impact mechanical properties and failure characteristics of the frozen soil. The impact loading also had a minor influence on the deformation of the hole.</div></div>","PeriodicalId":50303,"journal":{"name":"International Journal of Non-Linear Mechanics","volume":"172 ","pages":"Article 105039"},"PeriodicalIF":2.8000,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Non-Linear Mechanics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0020746225000277","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MECHANICS","Score":null,"Total":0}

引用次数: 0

Abstract

It is important to study the effects of the mechanical properties and failure characteristics of defective frozen soil under coupled compression–shear loading for engineering construction safety and disaster prevention. In this study, the particle flow code was used to establish the distinct element method (DEM) model of a split-Hopkinson pressure bar experiment on frozen soil. The failure processes of frozen soils with different tilting angles and holes were simulated using the DEM model to investigate the influence of the tilting angle and hole deviation (deviation from the geometric center of the frozen soil specimen) on the impact mechanical properties and failure characteristics of frozen soil specimens under coupled compression–shear loading. The results of numerical simulation indicated that when the tilting angle and impact strain rate were 0° and 100 s⁻¹, the axial peak stress of frozen soil specimen with a hole was smaller than that without a hole, the hole deviation had a minor influence on the axial peak stress. When the strain rate was 100 s⁻¹, the axial and shear peak stresses of the frozen soil specimen without a hole increased and decreased, respectively, with increasing tilting angle, and the number proportion of shear-cracks also increased. When the tilting angle and strain rate were 60° and 100 s⁻¹, the fully deviated hole had a minor influence on the impact mechanical properties and failure characteristics of the frozen soil. The impact loading also had a minor influence on the deformation of the hole.

查看原文本刊更多论文

压缩-剪切耦合作用下冻土冲击力学特性及破坏特征的DEM研究

研究压剪耦合作用下缺陷冻土的力学特性和破坏特征对工程建设安全和防灾具有重要意义。本文采用颗粒流程序建立了冻土劈裂-霍普金森压杆试验的离散元法（DEM）模型。采用DEM模型模拟了不同倾斜角度和孔位的冻土破坏过程，研究了倾斜角度和孔位偏差（与冻土试件几何中心的偏差）对压缩-剪切耦合加载下冻土试件冲击力学特性和破坏特征的影响。数值模拟结果表明：当倾斜角度为0°、冲击应变率为100 s−1时，有孔冻土试件的轴向峰值应力小于无孔冻土试件，孔偏差对轴向峰值应力的影响较小；当应变速率为100 s−1时，无孔冻土试件的轴向峰值应力随倾斜角的增大而增大，剪应力峰值应力随倾斜角的增大而减小，剪切裂缝的数量占比也增大。当倾斜角度为60°，应变速率为100 s−1时，全斜井孔对冻土的冲击力学特性和破坏特征影响较小。冲击载荷对孔的变形影响较小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

International Journal of Non-Linear Mechanics 物理-力学

CiteScore

5.50

自引率

9.40%

发文量

192

审稿时长

67 days

期刊介绍： The International Journal of Non-Linear Mechanics provides a specific medium for dissemination of high-quality research results in the various areas of theoretical, applied, and experimental mechanics of solids, fluids, structures, and systems where the phenomena are inherently non-linear. The journal brings together original results in non-linear problems in elasticity, plasticity, dynamics, vibrations, wave-propagation, rheology, fluid-structure interaction systems, stability, biomechanics, micro- and nano-structures, materials, metamaterials, and in other diverse areas. Papers may be analytical, computational or experimental in nature. Treatments of non-linear differential equations wherein solutions and properties of solutions are emphasized but physical aspects are not adequately relevant, will not be considered for possible publication. Both deterministic and stochastic approaches are fostered. Contributions pertaining to both established and emerging fields are encouraged.