ABSTRACT Self-healing materials have been recognized as a promising type of next-generation materials. Among them, self-healing ceramics play a particularly important role, and understanding them better is necessary. Therefore, in this study, we applied the oxidation kinetics-based constitutive model to finite element analysis of a series of damage-healing processes in self-healing ceramics (alumina/SiC composites). In the finite element analysis, the data on the microstructure distribution, such as relative density, size and aspect ratio of pores, and grain size, were taken as input values and reflected onto the parameters of a continuum damage model using a fracture mechanical model. We then performed a 3-point bending analysis, to consider both the self-healing effect under certain temperature and oxygen partial pressure conditions and scatter of the strength of the ceramics. Our results confirmed that the proposed methodology can reasonably reproduce both strength recovery and damage propagation behavior in self-healing ceramics.

中文翻译：

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自修复陶瓷断裂统计的有限元分析

摘要 自修复材料已被认为是一种有前途的下一代材料。其中，自修复陶瓷发挥着尤为重要的作用，更好地了解它们是有必要的。因此，在本研究中，我们将基于氧化动力学的本构模型应用于自修复陶瓷（氧化铝/SiC复合材料）中一系列损伤修复过程的有限元分析。在有限元分析中，微观结构分布的数据，例如相对密度、孔的尺寸和纵横比以及晶粒尺寸，被作为输入值，并使用断裂力学模型反映到连续损伤模型的参数上。然后我们进行了三点弯曲分析，以考虑一定温度和氧分压条件下的自愈效应以及陶瓷强度的分散性。我们的结果证实，所提出的方法可以合理地重现自修复陶瓷的强度恢复和损伤传播行为。