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構造用鋼S20Cおよび低温用鋼KT50Q薄板き裂材の破壊挙動について
https://jaxa.repo.nii.ac.jp/records/44737
https://jaxa.repo.nii.ac.jp/records/447376f0f52e9-554b-4474-bfc2-e7a1fb4b55ae
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
naltr00484.pdf (868.3 kB)
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| Item type | テクニカルレポート / Technical Report(1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2015-03-26 | |||||||||
| タイトル | ||||||||||
| タイトル | 構造用鋼S20Cおよび低温用鋼KT50Q薄板き裂材の破壊挙動について | |||||||||
| 言語 | ||||||||||
| 言語 | jpn | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_18gh | |||||||||
| 資源タイプ | technical report | |||||||||
| その他のタイトル（英） | ||||||||||
| その他のタイトル | Fracture Characteristics of Cracked Thin Sheet of S20C Mild Steel and KT50Q Low Temperature Structural Steel | |||||||||
| 著者 |
浜口, 泰正
× 浜口, 泰正
× HAMAGUCHI, Yasumasa
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| 著者所属 | ||||||||||
| 航空宇宙技術研究所機体第二部 | ||||||||||
| 著者所属（英） | ||||||||||
| en | ||||||||||
| Second Airframe Division, National Aerospace Laboratory(NAL) | ||||||||||
| 出版者 | ||||||||||
| 出版者 | 航空宇宙技術研究所 | |||||||||
| 出版者（英） | ||||||||||
| 出版者 | National Aerospace Laboratory(NAL) | |||||||||
| 書誌情報 |
航空宇宙技術研究所報告 en : Technical Report of National Aerospace Laboratory TR-484 巻 484, p. 10, 発行日 1977-01 |
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| 抄録（英） | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | Fracture characteristics, such as ductile-brittle transition temperature, fracture toughness Kc and J value, for fatigue cracked thin sheet specimens of S20C mild steel and KT50Q low temperature structural steel were investigated by static tensile tests within the range from room temperature to the temperature of liquid nitrogen(-196C). The following results were obtained. (1)The ductile-brittle transition temperature of the tested specimen(a/w=0.5, where a is the initial crack length and w is the width of the specimen) was approximately -100C for S20C and -170C for KT50Q. (2)Fracture toughness Kc, i.e., the critical value of the stress intensity factor was obtained at a lower temperature than that of ductile-brittle transition. Kc for S20C was from 100 to 160kg・mm-3/2, which decreased as the temperature was lowered. Kc for KT50Q was from 190 to 260kg・mm-3/2. (3)The J-integral has been proposed as the engineering fracture criterion for elastic-plastic behavior in metals. The J-integral concept was applied to the S20C test results. For the central cracked speciments, the J value at the inflection point of the P-δ curve(load vs. displacement relation), which seemed to be the slow crack initiation point, was almost constant regardless of a/w value. For the single edge cracked speciments, it was almost constant for a/w < 0.5. Moreover, it was shown that the J-integral can be simply evaluated from one P-δ curve for a series of crack toughness specimens having a central crack. | |||||||||
| ISSN | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 0389-4010 | |||||||||
| 資料番号 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 資料番号: NALTR0484000 | |||||||||
| レポート番号 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | レポート番号: NAL TR-484 | |||||||||
