| 孙毅,曹梦欣,杨志强.力场-化学场耦合作用对含裂纹固体电解质力学行为的研究[J].计算力学学报,2017,34(5):657~664 |
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| 力场-化学场耦合作用对含裂纹固体电解质力学行为的研究 |
| Mechanical behavior of cracked solid electrolyte under the coupled mechanical and chemical fields |
| 投稿时间：2016-04-27 修订日期：2016-08-08 |
| DOI：10.7511/jslx201705019 |
| 中文关键词: 力场-化学场耦合 电解质GDC 有限元 断裂行为 |
| 英文关键词:coupled mechnical-chemical fields GDC(Gadolinia Doped Ceria) finite element fracture behavior |
| 基金项目:高等学校博士学科点专项科研基金（20122302110020）资助项目. |
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| 中文摘要: |
| 为了研究力场-化学场耦合作用下的含裂纹电解质的断裂问题，本文构造了耦合情况下力场和浓度场的本构关系并由这些本构关系建立了力场-化学场耦合问题的有限元方程。通过具体的算例，进一步探讨了裂纹尖端应力场和氧空位浓度分布的耦合作用对GDC （氧化钆掺杂的氧化铈）力学行为的影响，发现在耦合作用下，裂尖应力场对氧空位的分布有明显的诱导作用。 |
| 英文摘要: |
| This paper studies the mechanical behavior of solid electrolyte under the coupled mechanical and chemical fields.The electrolyte model under the coupled mechanical-chemical fields is investigated at first,and the corresponding finite element variational forms are given.Then,the coupling effect of the crack tip stress fields and concentration distribution of oxygen vacancies on the GDC (Gadolinia Doped Ceria) are discussed in details.The results demonstrate that the stress field of crack tip has a significant effect on the distribution of oxygen vacancies. |
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