DSpace university logo mark
Japanese | English 

NAOSITE : Nagasaki University's Academic Output SITE > 060 工学部・工学研究科 > 060 紀要 > 長崎大学工学部研究報告 > 第2号 >


ファイル 記述 サイズフォーマット
kogaku00_02_01.pdf3.08 MBAdobe PDF本文ファイル

タイトル: 切欠材の疲労強度に及ぼす予加工の影響
その他のタイトル: Effect of Pre-strain on the Fatigue Strength of Notched Specimens
著者: 真武, 友一 / 藤村, 顕世
著者(別表記) : Matake, Tomokazu / Fujimura, Kensei
発行日: 1971年12月
出版者: 長崎大学工学部 / Faculty of Engineering, Nagasaki University
引用: 長崎大学工学部研究報告, (2), pp.1-7; 1971
抄録: Many researches are reported on the fatigue strength of unnotched specimens pre-strained. By their results, the fatigue limit of the pre-strained materials generally increase with increasing of the amount of pre-strain, but it is lower than that of the original when the pre-strain is small. While there are few investigations on the fatigue of notched specimens pre-strained. This paper is the results of experiment on the fatigue strength of the notched steel specimens having semi-circular groove of O.54 mm radius,for which the tensile pre-strain and then the fatigue test by direct stress are conducted. And they are different from those of the previous investigations on the fatigue strength of the pre-strained unnotched materials. That is,the fatigue limit rises with the increasing of the amount of pre-stratin,even when the pre-strain is small. This pheomenon is made clear from the results of the measurement of micro-hardness on the cross section and the observation on the surface of the notch root,as following:the state of the notch root under small pre-strain corresponds to the large pre-strain of the unnotched specimen.
URI: http://hdl.handle.net/10069/23754
ISSN: 02860902
資料タイプ: Departmental Bulletin Paper
原稿種類: publisher

引用URI : http://hdl.handle.net/10069/23754



Valid XHTML 1.0! Copyright © 2006-2015 長崎大学附属図書館 - お問い合わせ Powerd by DSpace