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首页> 外文期刊>Holzforschung >Investigating tool engagement in groundwood pulping: finite element modelling and in-situ observations at the microscale
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Investigating tool engagement in groundwood pulping: finite element modelling and in-situ observations at the microscale

机译：调查磨削刀具的工具啮合：微尺度的有限元建模和原位观测

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摘要

With industrial groundwood pulping processes relying on carefully designed grit surfaces being developed for commercial use, it is increasingly important to understand the mechanisms occurring in the contact between wood and tool. We present a methodology to experimentally and numerically analyse the effect of different tool geometries on the groundwood pulping defibration process. Using a combination of high-resolution experimental and numerical methods, including finite element (FE) models, digital volume correlation (DVC) of synchrotron radiation-based X-ray computed tomography (CT) of initial grinding and lab-scale grinding experiments, this paper aims to study such mechanisms. Three different asperity geometries were studied in FE simulations and in grinding of wood from Norway spruce. We found a good correlation between strains obtained from FE models and strains calculated using DVC from stacks of CT images of initial grinding. We also correlate the strains obtained from numerical models to the integrity of the separated fibres in lab-scale grinding experiments. In conclusion, we found that, by modifying the asperity geometries, it is, to some extent, possible to control the underlying mechanisms, enabling development of better tools in terms of efficiency, quality of the fibres and stability of the groundwood pulping process.
机译：利用工业大陆制浆工艺依靠精心设计的砂砾表面进行用于商业用途，越来越重要，了解木材和工具之间发生的机制。我们提出了一种实验和数值分析了不同工具几何对磨削抗置抗判定过程的影响的方法。使用高分辨率实验和数值方法的组合，包括有限元（FE）型号，数字体积相关（DVC）的同步辐射的X射线计算机断层扫描（CT）的初始研磨和实验室刻度研磨实验，这纸张旨在研究这些机制。在FE模拟中研究了三种不同的粗糙几何形状，并从挪威云杉的磨削中研磨。我们发现从Fe模型和使用DVC的堆栈的初始研磨的CT图像计算的菌株之间的菌株之间存在良好的相关性。我们还将从数值模型获得的菌株与实验室磨削实验中的分离纤维的完整性相关联。总之，我们发现，通过改变粗糙的几何形状，在一定程度上可以控制潜在的机制，从而能够在效率，纤维的质量和磨碎的制浆过程的稳定性方面开发更好的工具。

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  • 来源
    《Holzforschung》 |2020年第5期|477-487|共11页
  • 作者

    Carlsson Jenny; Heldin Magnus; Isaksson Per; Wiklund Urban;

  • 作者单位

    Uppsala Univ Dept Engn Sci Angstrom Lab Box 534 SE-75121 Uppsala Sweden;

    Uppsala Univ Dept Engn Sci Angstrom Lab Box 534 SE-75121 Uppsala Sweden;

    Uppsala Univ Dept Engn Sci Angstrom Lab Box 534 SE-75121 Uppsala Sweden;

    Uppsala Univ Dept Engn Sci Angstrom Lab Box 534 SE-75121 Uppsala Sweden;

  • 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

    CT; defibration; DVC; FE; grinding; wood;

    机译：CT;抗偏;DVC;FE;磨削;木材;

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