Optimizing Thermal Shock Resistance of Layered Refractories
Optimizing Thermal Shock Resistance of Layered Refractories
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DOI：
10.1002/adem.201100283
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发表时间：
2012-06
影响因子：
3.6
通讯作者：
J. Hein;M. Kuna
中科院分区：
文献类型：
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作者：
J. Hein;M. Kuna
严重的热冲击可能会导致耐火材料或陶瓷材料出现临界热应力和失效。为了提高耐热震性，建议采用分层材料结构。为了优化这些替代结构的性能，需要进行热机械模拟。在本研究中，有限差分法（FDM）用于求解具有空间变化参数的热传导偏微分方程。带材抗热震性的优化示例是在顶部表面经受恒定温度跳变的 10 层带材上进行的。每层可设置不同的多孔Al2O3和MgO陶瓷，其材料性能是在理论上确定的。在本研究中，开发了一种改进的优化方法，该方法由蒙特卡罗模拟和进化策略的组合和序列组成，以克服这两种技术的某些缺点。
Severe thermal shocks may cause critical thermal stresses and failure in refractories or ceramic materials. To increase the thermal shock resistance, layered material structures are suggested. In order to optimize properties of these alternative structures, thermo‐mechanical simulations are required. In this study, a finite difference method (FDM) is used for solving the partial differential equation of heat conduction with spatially varying parameters. The optimization of the strip's thermal shock resistance is exemplarily done on a 10 layered strip subjected to constant temperature jump on the top surface. Each layer can be set with different porous Al2O3 and MgO ceramics, whose material properties are theoretically determined. In this study, an improved optimization method is developed that consists of a combination and sequence of Monte Carlo simulations and evolution strategies to overcome certain disadvantages of both techniques.