WEKO3
アイテム
3次元突合せ継手の特異応力場の強さの解析と2次元モデルとの比較
https://doi.org/10.18997/00007197
https://doi.org/10.18997/00007197559879e6-f52f-40e1-9616-a5a40903be8b
| 名前 / ファイル | ライセンス | アクション |
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kou_k_459.pdf (3.8 MB)
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| アイテムタイプ | 学位論文 = Thesis or Dissertation(1) | |||||||||
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| 公開日 | 2019-06-13 | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||||
| 資源タイプ | doctoral thesis | |||||||||
| タイトル | ||||||||||
| タイトル | Analysis of Intensity of Singular Stress Field for Cylindrical and Three-Dimensional Butt Joints in Comparison with Two-Dimensional Model | |||||||||
| 言語 | en | |||||||||
| タイトル | ||||||||||
| タイトル | 3次元突合せ継手の特異応力場の強さの解析と2次元モデルとの比較 | |||||||||
| 言語 | ja | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 著者 |
任, 飛
× 任, 飛
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| 抄録 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | Adhesive joints are widely used in numerous industrial sectors, such as automobile, shipbuilding and aeronautics. However, as is known that there is stress singularity at the end of interface for different materials, which may result in the failure of the joint. The intensity of singular stress field （ISSF） has already been discussed for bonded plate under arbitrary material combination, while few studies are available for the ISSF of butt joints in axi-symmetrical and three-dimensional problems, and no results with varying material combination. Thus this research concentrated on the analysis of ISSFs of axi-symmetrical and three-dimensional butt joint problems, which may make a contribution on a general understanding of the strength for the axi-symmetrical and three-dimensional problems. This thesis is composed of total 5 chapters and organized as follows. Chapter 1 gives an introduction of composites and bonded structures applied to aviation industry, microelectronic packaging, and steel process equipment. With the extensive application of the technology, structural failure problems are emerging, which requires further study. Then, the issues of the research on singularity in the bonded structures are reviewed, and it is found that there are only few papers focused on the ISSF for axi-symmetrical and three-dimensional butt joint problems. Then, the research purpose of this thesis is introduced, focusing on the analysis of ISSF for axi-symmetrical and three-dimensional butt joints. In Chapter 2, the ISSF variations were clarified over the entire adhesive thickness range for plate butt joint. An effective mesh-independent technique was applied to obtaining the ISSFs under arbitrary material combinations. The bonded plate, which has been solved by the body force method, was used as the reference solution to eliminate FEM error. In Chapter 3, the ISSF variations were clarified over the entire adhesive thickness range for cylindrical butt joint. The results were calculated by changing the material combination systematically under the space of Dundurs’ parameters. The result of cylindrical butt joint has been compared with that of plate butt joint and the difference was elaborated. The non-singular stresses caused by the circumferential strain are contained in the FEM stresses at the interface end. The accurate method was used for calculating the ISSF from the ratio of the stress obtained by subtracting the non-singular stress to the stress of the plate butt joint adopted as the reference solution. The ISSF of axi-symmetrical problem cannot be governed by the Dunders’ parameters, therefore, the maximum and minimum values of the ISSFs were considered and shown in tables and charts in the space of Dundurs’ parameters. In Chapter 4, the adhesive strength of three-dimensional butt joint was studied in terms of the intensity of singular stress on the interface outer edge. The interface stress distributions of three-dimensional butt joint were obtained by using different mesh sizes. It was found that the singularity occurs on the interface outer edges. The stress distributions on the interface outer edge of three-dimensional butt joint were investigated by using the ratios of singular stresses. The adhesive strength on the interface outer edge can be evaluated by the constant critical ISSF as K3D σc =const. The ISSF at interface vertex cannot yet be obtained, fillet was considered instead of the vertex. The ISSF distributions on the fillet arc were investigated. The effect of fillet radius on the ISSF was discussed. When the fillet radius r/W≥0.0005, the adhesive strength can be evaluated by using the ISSF at the middle point of the interface outer edge. In the last chapter of this thesis, Chapter 5, main conclusions of this study were summarized for axi-symmetrical and three-dimensional butt joints. | |||||||||
| 言語 | en | |||||||||
| 目次 | ||||||||||
| 内容記述タイプ | TableOfContents | |||||||||
| 内容記述 | 1 Introduction||2 Analysis on intensity of singular stress for plate butt joint in comparison with bonded plate||3 Analysis on intensity of singular stress for cylindrical butt joint in comparison with plate butt joint||4 Analysis on intensity of singular stress on the interface outer edge of three-dimensional butt joint||5 Conclusion | |||||||||
| 備考 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 九州工業大学博士学位論文 学位記番号：工博甲第459号 学位授与年月日：平成30年9月21日 | |||||||||
| アドバイザー | ||||||||||
| 野田, 尚昭 | ||||||||||
| 学位授与番号 | ||||||||||
| 学位授与番号 | 甲第459号 | |||||||||
| 学位名 | ||||||||||
| 学位名 | 博士（工学） | |||||||||
| 学位授与年月日 | ||||||||||
| 学位授与年月日 | 2018-09-21 | |||||||||
| 学位授与機関 | ||||||||||
| 学位授与機関識別子Scheme | kakenhi | |||||||||
| 学位授与機関識別子 | 17104 | |||||||||
| 学位授与機関名 | 九州工業大学 | |||||||||
| 学位授与年度 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 平成30年度 | |||||||||
| 出版タイプ | ||||||||||
| 出版タイプ | VoR | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||
| アクセス権 | ||||||||||
| アクセス権 | open access | |||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||
| ID登録 | ||||||||||
| ID登録 | 10.18997/00007197 | |||||||||
| ID登録タイプ | JaLC | |||||||||
| 著者別名(ヨミ) | ||||||||||
| 識別子Scheme | WEKO | |||||||||
| 識別子 | 33643 | |||||||||
| 姓名 | ニン, ヒ | |||||||||
