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首页> 外文期刊>Fuel >Analysis of coke under compressive loading: A combined approach using micro-computed tomography, finite element analysis, and empirical models of porous structures
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Analysis of coke under compressive loading: A combined approach using micro-computed tomography, finite element analysis, and empirical models of porous structures

机译：压缩载荷下的焦炭分析：采用微计算机断层扫描，有限元分析和多孔结构经验模型的组合方法

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摘要

The behaviour of coke, a brittle porous material, under compressive loads is a major factor in determining its quality. Coke samples were compressed using a test stage fitted inside a micro-computed tomography scanner. Three-dimensional images of the samples before and after compression were acquired. The 'before' images were used to create finite element (FE) models of the coke. The effective Young's modulus was found by calibrating the linear elastic model using experimental data. The incremental displacement recorded during the experiments was then applied to the FE models. Comparison of FE analysis results with the 'after' images show high stress concentrations in the areas that cracked during the experiments, as well as reduced stresses in inerts. Displacement plots show a layered crushing pattern similar to that observed experimentally. Empirical models of brittle porous structures were used to estimate the elastic collapse stress of the coke wall. Results indicate that it may be the elastic collapse stress, rather than porosity, which best predicts whether a particular blend of coke will fail in compression.
机译：焦炭（一种脆性多孔材料）在压缩载荷下的行为是决定其质量的主要因素。使用安装在微型计算机断层扫描仪内部的测试台压缩焦炭样品。获取压缩之前和之后的样品的三维图像。 “之前”图像用于创建焦炭的有限元（FE）模型。有效杨氏模量是通过使用实验数据校准线性弹性模型而得出的。然后将实验期间记录的增量位移应用于有限元模型。有限元分析结果与“后”图像的比较表明，在实验过程中破裂的区域中应力集中较高，并且惰性气体的应力降低。位移图显示了类似于实验观察到的分层破碎模式。脆性多孔结构的经验模型被用来估计焦炭壁的弹性塌陷应力。结果表明，可能是弹性塌陷应力而不是孔隙率，它最能预测特定的焦炭混合物是否会压缩失败。

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  • 来源
    《Fuel》 |2011年第1期|p.384-388|共5页
  • 作者

    Naomi Tsafnat; Negin Amanat; Allan S. Jones;

  • 作者单位

    Australian Key Centre for Microscopy and Microanalysis. The University of Sydney, NSW 2006, Australia;

    Australian Key Centre for Microscopy and Microanalysis. The University of Sydney, NSW 2006, Australia;

    Australian Key Centre for Microscopy and Microanalysis. The University of Sydney, NSW 2006, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    coke; compression test; X-ray micro-computed tomography; micromechanical modelling; finite element analysis;

    机译：可乐;压缩测试;X射线计算机断层扫描;微观力学建模;有限元分析;

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