{"created":"2022-01-27T02:35:23.361880+00:00","id":2002678,"links":{},"metadata":{"_buckets":{"deposit":"866edffa-ae6e-4107-8ce5-f6b7e0372b7f"},"_deposit":{"id":"2002678","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"2002678"},"status":"published"},"_oai":{"id":"oai:u-ryukyu.repo.nii.ac.jp:02002678","sets":["1642837622505:1642837905044:1642837921834","1642838403551:1642838407312"]},"author_link":[],"item_1617186331708":{"attribute_name":"Title","attribute_value_mlt":[{"subitem_1551255647225":"石灰質砂と鋼材の摩擦特性に及ぼす水分の影響","subitem_1551255648112":"ja"},{"subitem_1551255647225":"The effect of water on frictional characteristics between calcareous sands and a steel plate","subitem_1551255648112":"en"}]},"item_1617186419668":{"attribute_name":"Creator","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"瀬戸内, 秀規","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"新城, 俊也","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"Setouchi, Hideki","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Shinjo, Toshiya","creatorNameLang":"en"}]}]},"item_1617186476635":{"attribute_name":"Access Rights","attribute_value_mlt":[{"subitem_1522299639480":"open access","subitem_1600958577026":"http://purl.org/coar/access_right/c_abf2"}]},"item_1617186609386":{"attribute_name":"Subject","attribute_value_mlt":[{"subitem_1522299896455":"ja","subitem_1522300014469":"Other","subitem_1523261968819":"石灰質砂"},{"subitem_1522299896455":"ja","subitem_1522300014469":"Other","subitem_1523261968819":"摩擦係数"},{"subitem_1522299896455":"ja","subitem_1522300014469":"Other","subitem_1523261968819":"鋼材"},{"subitem_1522299896455":"ja","subitem_1522300014469":"Other","subitem_1523261968819":"水分"},{"subitem_1522299896455":"ja","subitem_1522300014469":"Other","subitem_1523261968819":"極性"},{"subitem_1522299896455":"en","subitem_1522300014469":"Other","subitem_1523261968819":"Calcareous sand"},{"subitem_1522299896455":"en","subitem_1522300014469":"Other","subitem_1523261968819":"Frictional coefficient"},{"subitem_1522299896455":"en","subitem_1522300014469":"Other","subitem_1523261968819":"Steel plate"},{"subitem_1522299896455":"en","subitem_1522300014469":"Other","subitem_1523261968819":"Water"},{"subitem_1522299896455":"en","subitem_1522300014469":"Other","subitem_1523261968819":"Polarity"}]},"item_1617186626617":{"attribute_name":"Description","attribute_value_mlt":[{"subitem_description":"乾燥状態および湿潤状態の石灰質砂について鋼材との摩擦試験を実施した。その結果, 摩擦特性は乾燥砂と湿潤砂では異なることが分かった。得られた主な結果を豊浦標準砂および国頭マージの結果と併せて以下に示す。(1) 乾燥土および無極性の四塩化炭素で浸した土の摩擦係数は各試験(σ_c=0.1∿0.7MPa)でばらつき, 石灰質砂の摩擦係数は相対湿度の上昇に伴い増加する。(2) 乾燥した石灰質砂の大変形時の摩擦係数は大きな値を示す。その原因は, せん断変位の増加に伴い砂と鋼材表面吸着膜の摩擦現象から砂と実鋼材表面の摩擦現象に移行するためだと推察される。(3) 湿潤状態の豊浦標準砂では, スティック・スリップ現象が確認された。(4) 湿潤状態の国頭マージの摩擦係数は, 乾燥状態の摩擦係数に比べ小さい値を示す。(5) 湿潤土におけるせん断応力と垂直応力の関係はクーロンの摩擦則に従う。(6) 土と鋼材の摩擦に関する研究においては, 水分の影響を考慮する必要がある。","subitem_description_type":"Other"},{"subitem_description":"The frictional characteristics between calcareous sands and the steel plate with the smooth surface were investigated experimentally. The tests were also performed on Toyoura sand and Kunigami-maji having clay minerals for the comparison of their frictional characteristics. Test results revealed that the frictional coefficients of dry calcareous sands were variations but the frictional coefficients of wet calcareous sands indicated the constant value. It was found, the frictional characteristics of sands soaked in the non-polar fluid were similar to the frictional characteristics of dry sands. The frictional characteristics of wet Toyoura sand showed the stick-slip phenomenon. No consistent relationship was found between the polarity of water and its effectiveness as a lubricant of clay minerals.","subitem_description_type":"Other"},{"subitem_description":"紀要論文","subitem_description_type":"Other"}]},"item_1617186643794":{"attribute_name":"Publisher","attribute_value_mlt":[{"subitem_1522300295150":"ja","subitem_1522300316516":"琉球大学農学部"}]},"item_1617186702042":{"attribute_name":"Language","attribute_value_mlt":[{"subitem_1551255818386":"jpn"}]},"item_1617186783814":{"attribute_name":"Identifier","attribute_value_mlt":[{"subitem_identifier_type":"HDL","subitem_identifier_uri":"http://hdl.handle.net/20.500.12000/3648"}]},"item_1617186920753":{"attribute_name":"Source Identifier","attribute_value_mlt":[{"subitem_1522646500366":"ISSN","subitem_1522646572813":"0370-4246"},{"subitem_1522646500366":"NCID","subitem_1522646572813":"AN00250548"}]},"item_1617186941041":{"attribute_name":"Source Title","attribute_value_mlt":[{"subitem_1522650068558":"ja","subitem_1522650091861":"琉球大学農学部学術報告"},{"subitem_1522650068558":"en","subitem_1522650091861":"The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus"}]},"item_1617187056579":{"attribute_name":"Bibliographic Information","attribute_value_mlt":[{"bibliographicIssueNumber":"48","bibliographicPageEnd":"111","bibliographicPageStart":"103"}]},"item_1617258105262":{"attribute_name":"Resource Type","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_1617265215918":{"attribute_name":"Version Type","attribute_value_mlt":[{"subitem_1522305645492":"VoR","subitem_1600292170262":"http://purl.org/coar/version/c_970fb48d4fbd8a85"}]},"item_1617605131499":{"attribute_name":"File","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","filename":"KJ00000161922.pdf","mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://u-ryukyu.repo.nii.ac.jp/record/2002678/files/KJ00000161922.pdf"},"version_id":"2a91281e-0055-40ee-8a4b-b96529c7c709"}]},"item_title":"石灰質砂と鋼材の摩擦特性に及ぼす水分の影響","item_type_id":"15","owner":"1","path":["1642837921834","1642838407312"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2008-02-14"},"publish_date":"2008-02-14","publish_status":"0","recid":"2002678","relation_version_is_last":true,"title":["石灰質砂と鋼材の摩擦特性に及ぼす水分の影響"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-02-14T21:39:13.807622+00:00"}