{"created":"2023-06-20T15:05:17.414363+00:00","id":34581,"links":{},"metadata":{"_buckets":{"deposit":"7971b2f1-da43-4ee5-9742-487b38be8d5a"},"_deposit":{"created_by":1,"id":"34581","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"34581"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00034581","sets":["1887:1890","1896:1898:1899:1901"]},"author_link":["419907"],"item_9_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1958-08","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"5","bibliographicPageEnd":"151","bibliographicPageStart":"99","bibliographicVolumeNumber":"24","bibliographic_titles":[{"bibliographic_title":"東京大學航空研究所報告"},{"bibliographic_title":"Report/Aeronautical Research Institute, University of Tokyo","bibliographic_titleLang":"en"}]}]},"item_9_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"The present paper is divided into three parts. First of all, a phenomenological fracture hypothesis or criterion of polycrystalline metals was presented in a general form in Part I. A method to predict the fracture stresses under polyaxial uniform stresses was shown and the experimental fracture results of ductile metals were well explained. Moreover, qualitative views on the problem of low temperature brittle fracture and the effects of prestrains were also shown from a consideration of temperature characteristics of fracture stress surface. Next, in Part II, the author attached importance to the fact that the difficulties of analysing the stress and strain distributions at the moment of fracture cause much complexity in practical fracture problems, and carried out tensile fracture tests of mild steel round bars having hyperbolic notches. After analysing their distributions across the minimum section, the author explained the fracture stresses together with various fracture behaviors by using the fracture criterion and presented a qualitative view as to the notch brittleness phenomenon. Lastly, to ascertain the validity and applicability of this criterion to brittle metals, the author carried out fracture tests on thin-walled gray cast iron tubes under various ratios of combined tension and torsion in Part III. First, the peculiarities arising in elastic and plastic deformations under combined stresses and absent in ductile metals were discussed with due account of the notch effect due to the heterogeneous graphites in pearlite matrix. Secondly, the fracture behaviors under combined stresses were discussed by taking into account the mechanism of deformation and applying the fracture criterion at the tip of graphite flake. Furthermore, the findings of other research students under other kinds of polyaxial stresses are cited and discussed for purposes of analysing the criteria proposed by others. From all the descriptions, the reasonableness of the author's fracture criterion on polycrystalline metals seemed to be established.","subitem_description_type":"Other"}]},"item_9_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: SA2404776000","subitem_description_type":"Other"}]},"item_9_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学航空研究所"}]},"item_9_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"Aeronautical Research Institute, University of Tokyo"}]},"item_9_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0376-1061","subitem_source_identifier_type":"ISSN"}]},"item_9_source_id_24":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA00514444","subitem_source_identifier_type":"NCID"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"UEMURA, Masuji","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-01-24"}],"displaytype":"detail","filename":"SA2404776.pdf","filesize":[{"value":"3.8 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"SA2404776.pdf","url":"https://jaxa.repo.nii.ac.jp/record/34581/files/SA2404776.pdf"},"version_id":"b2b6e0b9-e8dd-4588-a3d5-7dda17ac32e2"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"On the Fracture of Metals","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"On the Fracture of Metals","subitem_title_language":"en"}]},"item_type_id":"9","owner":"1","path":["1890","1901"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"34581","relation_version_is_last":true,"title":["On the Fracture of Metals"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T23:39:06.266936+00:00"}