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首页> 外文期刊>ISIJ international >Simulation of Crack Initiation on the Slab in Continuous Casting Machine by FEM
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Simulation of Crack Initiation on the Slab in Continuous Casting Machine by FEM

机译：用FEM的连续铸造机裂纹启动的模拟

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摘要

In continuous casting of steel, prevention of surface cracks on the slab is an important issue. For quantitative evaluation of cracks that occur in the continuous casting machine, the critical strain for crack generation was analyzed by a high-temperature tensile test and FEM simulation. Based on obtained material property values, a model for crack generation by tensile strain was constructed. The local strain at the notch relative to the strain in the whole specimen was determined by a simulation of the tensile test, and the critical strain for crack generation ε_c was calculated. The results of a crack simulation by FEM using ε_c showed that the average strain until crack initiation was small under deep notch conditions. The average strain for crack generation calculated by the simulation model was in good agreement with the value measured in the tensile test. As a result of the simulation applying temperature distribution to the slab, the depth change of the oscillation mark was more influential to crack formation than the change of the width. The effect of the shape of the oscillation mark on the crack cannot be organized only by the stress concentration factor. Simulation analysis that includes the shape of the oscillation mark is considered to be effective. Using this simulation model, it is possible to predict the generation of cracking when the temperature distribution or the oscillation mark shape in actual operation changes.
机译：在连续铸造钢中，防止板块表面裂缝是一个重要问题。对于在连续铸造机中发生的裂缝的定量评估，通过高温拉伸试验和有限元模拟分析裂纹产生的临界应变。基于获得的材料性能值，构建了拉伸菌株的裂纹产生模型。通过模拟拉伸试验确定相对于整个样本中的菌株的溶液中的局部应变，并计算裂缝产生ε_c的临界应变。使用ε_c的有限元素裂纹模拟的结果显示平均菌株直至在深度缺口条件下小。模拟模型计算的裂缝产生的平均菌株与在拉伸试验中测量的值吻合良好。由于将温度分布施加到板坯的模拟，振荡标记的深度变化比宽度的变化更具影响力。振荡标记的形状的效果不能仅通过应力浓度因子来组织。仿真分析包括振荡标记的形状被认为是有效的。使用该仿真模型，可以在实际操作变化中的温度分布或振荡标记形状时预测裂缝的产生。

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  • 来源
    《ISIJ international》 |2019年第5期|865-871|共7页
  • 作者

    Keigo TOISHI; Yuji MIKI; Naoki KIKUCHI;

  • 作者单位

    Steel Research Laboratory JFE Steel Corporation 1 Kokan-cho Fukuyama Hiroshima 721-8510 Japan;

    Steel Research Laboratory JFE Steel Corporation 1 Kokan-cho Fukuyama Hiroshima 721-8510 Japan;

    Steel Research Laboratory JFE Steel Corporation 1 Kokan-cho Fukuyama Hiroshima 721-8510 Japan;

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

    continuous casting; crack; high-temperature tensile test; oscillation mark; FEM; critical strain;

    机译：连续铸造;裂缝;高温拉伸试验;振荡标记;FEM;临界应变;

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