Kinetics-based constitutive model for self-healing ceramics and its application to finite element analysis of Alumina/Sic composites
Kinetics-based constitutive model for self-healing ceramics and its application to finite element analysis of Alumina/Sic composites
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基于动力学的自修复陶瓷本构模型及其在氧化铝/碳化硅复合材料有限元分析中的应用
DOI：
10.1016/j.oceram.2021.100135
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Toshio Osada
中科院分区：
文献类型：
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作者：
Shingo Ozaki;Joji Yamamoto;Naoki Kanda;Toshio Osada
自修复陶瓷由于其重量轻、抗脆性断裂的可靠性和耐极端温度的高能力而被认为是有前途的下一代材料。因此，有必要更好地了解这些材料，以促进其作为组件的使用。在这项研究中，我们首先提出了一个基于氧化动力学的本构模型来分析损伤和愈合过程中的自愈合陶瓷的有限元方法的框架内。特别是，由于自我修复损伤恢复的进化规律进行了介绍。随后，我们进行了三点弯曲分析，模拟实际实验，考虑在一定的温度和氧分压条件下的自愈效果。我们的分析结果证实，所提出的方法可以合理地再现时间和环境依赖性的强度恢复在自愈合陶瓷。在这方面，我们的方法可以用来探索与微观结构分布和断裂性能，材料设计所必需的自愈合行为。
Self-healing ceramics are recognized as promising next-generation materials owing to their light weight, reliability against brittle fracture, and high capacity to withstand extreme temperatures. Thus, a better understanding of these materials is necessary to facilitate their use as components. In this study, we first proposed an oxidation kinetics-based constitutive model to analyze both damage and healing processes in self-healing ceramics within the framework of the finite element method. In particular, evolution laws for damage recovery due to self-healing were introduced. Subsequently, we performed three-point bending analyses mimicking actual experiments for considering the self-healing effect under certain temperature and oxygen partial pressure conditions. Our analytical results confirm that the proposed methodology can reasonably reproduce both time- and environment-dependencies of strength recovery in self-healing ceramics. In this regard, our method can be utilized for exploring the self-healing behavior linked with the microstructure distribution and fracture properties, essential for the material design.