Experimental investigation on deformation and damage properties of soft red mudstone subjected to high-cycle cyclic loads based on AE parameters

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2024-12-19 DOI:10.1007/s10064-024-04047-4

Tianyou Yu, Guanlu Jiang, Xianfeng Liu, Ruizhao Liu, Shengyang Yuan, Dan Zhu

{"title":"Experimental investigation on deformation and damage properties of soft red mudstone subjected to high-cycle cyclic loads based on AE parameters","authors":"Tianyou Yu, Guanlu Jiang, Xianfeng Liu, Ruizhao Liu, Shengyang Yuan, Dan Zhu","doi":"10.1007/s10064-024-04047-4","DOIUrl":null,"url":null,"abstract":"<div><p>As a common foundation material for railway subgrades, red mudstone is prone to fatigue damage and deformation under the impact of high-cycle train loads. To comprehensively understand the dynamic damage and deformation behaviour of soft red mudstone, high-cycle cyclic loading tests were carried out to investigate the deformation and crack evolution of soft red mudstone based on acoustic emission (AE) parameter analysis. Then, monotonic compression was performed, and the impact of self-healing on AE characteristics was studied. Tests results showed that cyclic loadings are more likely to cause the matrix loosening and produce small size micro-cracks compared with monotonic loadings. And AE signals exceeding 300 kHz of high frequency increases with the increase of loading frequency, indicating the size of micro-cracks decreases with the increase of loading frequency. The proportion of shear cracks increases exponentially with the increase of upper limit stress but decreases linearly with the increase of loading frequency. Kaiser effect of soft red mudstone decreases or even disappears under the effect of self-healing with the increase of the interval time <i>Δt</i> between cyclic and monotonic loads. In addition, it is found radial strain is more sensitive to the rock’s damage progression compared to axial strain. There is a stronger correlation between axial strain and the damage under cyclic loading conditions than under monotonic loading conditions. The volume strains of rock samples under cyclic loading are relatively smaller compared to monotonic loading under the same damage variable.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 1","pages":""},"PeriodicalIF":3.7000,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Engineering Geology and the Environment","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10064-024-04047-4","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}

引用次数: 0

Abstract

As a common foundation material for railway subgrades, red mudstone is prone to fatigue damage and deformation under the impact of high-cycle train loads. To comprehensively understand the dynamic damage and deformation behaviour of soft red mudstone, high-cycle cyclic loading tests were carried out to investigate the deformation and crack evolution of soft red mudstone based on acoustic emission (AE) parameter analysis. Then, monotonic compression was performed, and the impact of self-healing on AE characteristics was studied. Tests results showed that cyclic loadings are more likely to cause the matrix loosening and produce small size micro-cracks compared with monotonic loadings. And AE signals exceeding 300 kHz of high frequency increases with the increase of loading frequency, indicating the size of micro-cracks decreases with the increase of loading frequency. The proportion of shear cracks increases exponentially with the increase of upper limit stress but decreases linearly with the increase of loading frequency. Kaiser effect of soft red mudstone decreases or even disappears under the effect of self-healing with the increase of the interval time Δt between cyclic and monotonic loads. In addition, it is found radial strain is more sensitive to the rock’s damage progression compared to axial strain. There is a stronger correlation between axial strain and the damage under cyclic loading conditions than under monotonic loading conditions. The volume strains of rock samples under cyclic loading are relatively smaller compared to monotonic loading under the same damage variable.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.