{"title":"The creep behavior and damage evolution evaluated by acoustic emission of thermally-cycled argillaceous siltstone at selected temperatures","authors":"","doi":"10.1007/s11043-024-09675-7","DOIUrl":null,"url":null,"abstract":"<h3>Abstract</h3> <p>In order to study the effect of high-temperature and water-cooling on the argillaceous siltstone creep mechanical behavior, the samples were treated at 200 °C, 600 °C, and 1000 °C respectively, and then cooled with water. Then, the uniaxial compression creep mechanics test was carried out, and the acoustic emission (AE) characteristics were monitored in the entire creep process in synchronization. The results show that: (1) With the increase in temperature, the creep failure strength of argillaceous siltstone decreases, and its macroscopic failure mode transition from shear failure mode to split failure mode. (2) High temperature inhibits both the instantaneous strain and the creep strain and steady creep rate are significantly reduced after high-temperature treatment. (3) The creep curves were fitted and identified by the L-M optimization algorithm under different high-temperature and water-cooling conditions. The Burgers creep model can better describe the argillaceous siltstone creep characteristics. Elastic coefficients <span> <span>\\(E_{1}\\)</span> </span>, and <span> <span>\\(E_{2}\\)</span> </span>, and viscosity coefficients <span> <span>\\(\\eta _{1}\\)</span> </span>, and <span> <span>\\(\\eta _{2}\\)</span> </span> decreased after high-temperature and water-cooling treatment. The viscosity is enhanced, and the damage-hardening characteristics are obvious. (4) The AE ringing count rate decreases at the initial loading moment and the steady creep stage after high-temperature treatment. The evolution trend of the AE event ringing count rate at the steady creep stage is consistent with that of the creep rate.</p>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":null,"pages":null},"PeriodicalIF":2.1000,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mechanics of Time-Dependent Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s11043-024-09675-7","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CHARACTERIZATION & TESTING","Score":null,"Total":0}
引用次数: 0
Abstract
In order to study the effect of high-temperature and water-cooling on the argillaceous siltstone creep mechanical behavior, the samples were treated at 200 °C, 600 °C, and 1000 °C respectively, and then cooled with water. Then, the uniaxial compression creep mechanics test was carried out, and the acoustic emission (AE) characteristics were monitored in the entire creep process in synchronization. The results show that: (1) With the increase in temperature, the creep failure strength of argillaceous siltstone decreases, and its macroscopic failure mode transition from shear failure mode to split failure mode. (2) High temperature inhibits both the instantaneous strain and the creep strain and steady creep rate are significantly reduced after high-temperature treatment. (3) The creep curves were fitted and identified by the L-M optimization algorithm under different high-temperature and water-cooling conditions. The Burgers creep model can better describe the argillaceous siltstone creep characteristics. Elastic coefficients \(E_{1}\), and \(E_{2}\), and viscosity coefficients \(\eta _{1}\), and \(\eta _{2}\) decreased after high-temperature and water-cooling treatment. The viscosity is enhanced, and the damage-hardening characteristics are obvious. (4) The AE ringing count rate decreases at the initial loading moment and the steady creep stage after high-temperature treatment. The evolution trend of the AE event ringing count rate at the steady creep stage is consistent with that of the creep rate.
期刊介绍：
Mechanics of Time-Dependent Materials accepts contributions dealing with the time-dependent mechanical properties of solid polymers, metals, ceramics, concrete, wood, or their composites. It is recognized that certain materials can be in the melt state as function of temperature and/or pressure. Contributions concerned with fundamental issues relating to processing and melt-to-solid transition behaviour are welcome, as are contributions addressing time-dependent failure and fracture phenomena. Manuscripts addressing environmental issues will be considered if they relate to time-dependent mechanical properties.
The journal promotes the transfer of knowledge between various disciplines that deal with the properties of time-dependent solid materials but approach these from different angles. Among these disciplines are: Mechanical Engineering, Aerospace Engineering, Chemical Engineering, Rheology, Materials Science, Polymer Physics, Design, and others.
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