Modeling the impact of microcracking on the thermoelasticity of porous and microcracked ceramics
Modeling the impact of microcracking on the thermoelasticity of porous and microcracked ceramics
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模拟微裂纹对多孔和微裂纹陶瓷热弹性的影响
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
G. Bruno
中科院分区：
文献类型：
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作者：
A. Efremov;G. Bruno
建立了完整性因子模型的基础，并对模型进行了讨论。微裂纹材料的内应力（作为温度的函数）的计算是在宏观膨胀和衍射测量的晶格膨胀的基础上进行的。推导是从单晶的第一原理开始，然后将方法扩展到多晶，包括复杂的微观结构，如含有孔隙度，微裂纹和多相。重点是铸造各向异性晶体的材料性能和微观结构之间的关系的基本原理，并在由此产生的宏观行为。以微裂纹β-锂霞石和多孔微裂纹钛酸铝复合材料为例，对模型进行了验证。
The foundations of the Integrity Factor Model are laid down and the model is discussed. The calculation of the internal stresses in microcracked materials (as a function of temperature) is done on the basis of both the macroscopic dilation and the lattice expansion measured by diffraction. The derivation is made starting from first principles for a single crystal, and then extending the approach to polycrystals, including complex microstructures, such as those containing porosity, microcracks, and multiple phases. Focus is cast on the fundamentals of the relationship between material properties and microstructure of anisotropic crystals, and on the resulting macroscopic behavior. The model is validated against experimental data, with the examples of the microcracked β-eucryptite and porous microcracked aluminum titanate composite.