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延性損傷モデルを用いた予ひずみ材の延性き裂進展抵抗の予測手法の提案
https://repo.qst.go.jp/records/2000804
https://repo.qst.go.jp/records/2000804f5730c64-dead-4f06-ac73-63dbd8530e73
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||||||||||
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| 公開日 | 2024-12-27 | |||||||||||||||||
| タイトル | ||||||||||||||||||
| タイトル | 延性損傷モデルを用いた予ひずみ材の延性き裂進展抵抗の予測手法の提案 | |||||||||||||||||
| 言語 | ja | |||||||||||||||||
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| 言語 | jpn | |||||||||||||||||
| 資源タイプ | ||||||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||||||
| 資源タイプ | journal article | |||||||||||||||||
| 著者 |
大畑 充
× 大畑 充
× 庄司 博人
× 清水 万真
× 谷川 博康
× 加藤 太一朗
× 野澤 貴史
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| 抄録 | ||||||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||||||
| 内容記述 | This study aims to develop a numerical simulation-based method for predicting ductile crack growth resistance curve (R-curve) for pre-strained components for rational assessment of ductile crack growth controlling fracture for pre-strained structural component with any plastic constraint. Experiments on R-curve of 3-point bend specimen with a shallow crack for steel prestrained by 6% over uniform elongation provides that the pre-strain does not significantly reduce ductile crack initiation and growth resistance, even though the pre-strain induces disappearance of uniform elongation and work hardening together with drastic reduction in elongation. Observations of damage evolution in terms of micro-void formation indicate that ductile crack growth behaviors in both virgin and pre-strained steels are based on a micro-void nucleation-controlled ductile fracture mechanism. These experimental results demonstrate that the ductile damage model that we have already proposed for predicting R-curve for virgin steel that exhibits micro-void nucleation-controlled ductile fracture behaviors can be applicable for these virgin and pre-strained steels used. Thus, based on the previously proposed ductile damage model, a simulation-based method to predict the R-curve of pre-strained specimens only from the properties of virgin steel is proposed taking material degradation (change in strength and damage properties) due to pre-strain into account. The applicability of the proposed method is verified by showing the predicted R-curve for pre-strained steel are in good agreement with experimental results. |
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| 書誌情報 |
日本機械学会論文集 巻 89, 号 926, p. 23-00168, 発行日 2023-09 |
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| 出版者 | 一般社団法人日本機械学会 | |||||||||||||||||
| ISSN | ||||||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||||||
| 収録物識別子 | 2187-9761 | |||||||||||||||||
| DOI | ||||||||||||||||||
| 識別子タイプ | DOI | |||||||||||||||||
| 関連識別子 | 10.1299/transjsme.23-00168 | |||||||||||||||||
