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KAKEN_16K17977seika.pdf
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:79.0 KB
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:Oct 31, 2019 |
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Total downloads since Oct 31, 2019 : 353
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SOFC長寿命化に貢献する強弾性構成モデルの提案と次世代型燃料電池設計指針の確立
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SOFC チョウジュミョウカ ニ コウケンスル キョウダンセイ コウセイ モデル ノ テイアン ト ジセダイガタ ネンリョウ デンチ セッケイ シシン ノ カクリツ
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SOFC chōjumyōka ni kōkensuru kyōdansei kōsei moderu no teian to jisedaigata nenryō denchi sekkei shishin no kakuritsu
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Ferroelastic constitutive model contributing to prolongation of SOFC life and establishment of next-generation fuel cell design guideline
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村松, 眞由
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ムラマツ, マユ
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Muramatsu, Mayu
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慶應義塾大学・理工学部 (矢上)・講師
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Research team head
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科研費研究者番号 : 20609036
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2019
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科学研究費補助金研究成果報告書
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2018
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本研究では，固体酸化物燃料電池 (SOFC) の空気極となるランタンストロンチウムコバ ルトフェライト (LSCF) の微視組織の発展を考慮し，SOFCにおける強弾性現象を表現可能な数理モデルを開発した．Phase-field場と変形場の連成解析プログラムを実装し，マクロな力学特性を算出するとともに，外部応力場において形成される組織に関する考察も行った．また，多結晶材料における解析を実施した．その結果初期核生成サイトおよび結晶方位に依存して異なるバリアントおよび方位のラメラ組織が形成される様子を再現した．さらに連成型均質化法における解析より，強弾性相の成長中に生じるマクロ変形を示した．
In this study, considering the development of microstructure of lanthanum strontium cobalt ferrite (LSCF), which is the cathode electrode of solid oxide fuel cell (SOFC), we developed a mathematical model that can express ferroelastic phenomena in SOFC. We implemented a coupled analysis program of Phase-field and deformation field, calculated macroscopic mechanical properties, and also considered the structure formed in external stress field. In addition, analysis for polycrystalline materials were performed. As a result, it was reproduced that lamellar structures of different variants and orientations were formed depending on the initial nucleation site and crystal orientation. Furthermore, from the analysis in the coupling homogenization method, the macroscopic deformation which occurs during the growth of the ferroelastic phase is shown.
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研究種目 : 若手研究(B)
研究期間 : 2016～2018
課題番号 : 16K17977
研究分野 : 固体力学, 計算力学
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