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Thermomechanical properties of non-linear refractories.

机译：非线性耐火材料的热机械性能。

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摘要

Thermomechanical fracture properties of self-flow refractory castables were derived and presented. The energy release rate for a double cantilever beam was modeled using the finite element method in the presence of a thermal gradient and compared to accepted solutions. The modulus of elasticity of refractory castables is reviewed and measured as a function of temperature by a novel technique, the impulse excitation method. An equation for the energy release rate of the wedge loaded specimen was found and compared to the compact tension, three point bend and double cantilever beam specimen. Energy release rates including the linear elastic energy release rate, critical energy release rate and work of fracture were measured isothermally at room temperature and 600°C, in a gradient from 600°C to room temperature and from room temperature to 600°C and along an isotherm in a thermal gradient. The energy release rates were compared and variations were explained due to composition and thermal gradient. Hasselman's thermal shock parameters were reviewed and converted to fracture mechanics energy release rate and work of fracture values. Thermal expansion was measured and used in conjunction with the energy release rate for crack initiation and work of fracture to calculate and compare non-thermal transport based thermal shock parameters.
机译：推导并提出了自流耐火浇注料的热机械断裂性能。在存在温度梯度的情况下，使用有限元方法对双悬臂梁的能量释放速率进行了建模，并与公认的解决方案进行了比较。耐火浇注料的弹性模量是通过一种新颖的技术即脉冲激发法来审查和测量的，它是温度的函数。找到了楔形加载样本的能量释放速率方程，并将其与紧凑张力，三点弯曲和双悬臂梁样本进行了比较。能量释放速率包括线性弹性能量释放速率，临界能量释放速率和断裂功，是在室温和600°C等温下，从600°C到室温以及从室温到600°C以及沿热梯度中的等温线。比较了能量释放速率，并解释了由于组成和热梯度而引起的变化。审查了Hasselman的热冲击参数，并将其转换为断裂力学的能量释放速率和断裂功。测量了热膨胀，并将其与能量释放速率结合起来用于裂纹萌生和断裂功，以计算和比较基于非热传输的热冲击参数。

著录项

  • 作者

    Headrick, William Lloyd, Jr.;

  • 作者单位

    University of Missouri - Rolla.;

  • 授予单位 University of Missouri - Rolla.;
  • 学科 Materials science.
  • 学位 Ph.D.
  • 年度 2000
  • 页码 112 p.
  • 总页数 112
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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