{"_buckets": {"deposit": "197ee488-c8c8-445c-853d-b40bd0da0766"}, "_deposit": {"id": "3698", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "3698"}, "status": "published"}, "_oai": {"id": "oai:niigata-u.repo.nii.ac.jp:00003698"}, "item_5_alternative_title_1": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "The Measuring Method about Young\u0027s Modulus of Plastics Using the Indenting Hardness Test by a Spherical Indenter"}]}, "item_5_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1987-11", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "495", "bibliographicPageEnd": "2202", "bibliographicPageStart": "2193", "bibliographicVolumeNumber": "53", "bibliographic_titles": [{"bibliographic_title": "\u65e5\u672c\u6a5f\u68b0\u5b66\u4f1a\u8ad6\u6587\u96c6. A\u7de8"}, {"bibliographic_title": "\u65e5\u672c\u6a5f\u68b0\u5b66\u4f1a\u8ad6\u6587\u96c6. A\u7de8", "bibliographic_titleLang": "en"}]}]}, "item_5_description_4": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "This study aims at investigating the performance of a hardness testing machine. First, the phenomenon of a contact between a rigid sperical indenter and a plastic material is considered. By using Hertz\u0027s elastic contact law, the Young\u0027s modulus of plastics Es can be calculated from Eq. (1) using the cordal diameter of an indentation d, the elastic recovery of an indentation \u03b4_r and the indenting load L : E_s = 0.9(3/2) L/(d \u03b4_r)\u2026(1) From the geometrical relation at the contact part, the contacting diameter d_c and the surface level diameter d_l are derived as follows. (\u03b4_t : the total depth) : d_c = 2[D(\u03b4_t-\u03b4_r/2){1-(\u03b4_t-\u03b4_r/2)/D}]^\u003c1/2\u003e\u2026(2), d_l = 2[D\u03b4_t\u00d7(1-\u03b4_t/D)}^\u003c1/2\u003e\u2026(3) Furthermore, the mean strain rate under the elastic recovery by a spherical indenter is related to the strain rate under the uniaxial stress field. Finally, the indenting experiments are carried out, \u03b4_r and \u03b4_t are measured so that a cordal diameter d is formulated as follows : d = d_l{1.71-0.707(d_l/d_c)}\u2026(4) When the Young\u0027s moduli calculated from \u03b4_t and \u03b4_r using Eqs. (1)-(4) are compared to the Young\u0027s moduli measured from a compression test, their Young\u0027s values consist within an accuracy of about \u00b15-10%. Therefore, the measuring method about Young\u0027s modulus of plastics using the indenting hardness test by a spherical indenter can be applied to the present hardness testing machines.", "subitem_description_type": "Abstract"}]}, "item_5_full_name_3": {"attribute_name": "\u8457\u8005\u5225\u540d", "attribute_value_mlt": [{"nameIdentifiers": [{"nameIdentifier": "44761", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "Ishibashi, Tatsuya"}]}, {"nameIdentifiers": [{"nameIdentifier": "44762", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "Shimoda, Shigeru"}]}, {"nameIdentifiers": [{"nameIdentifier": "44763", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "Furukawa, Tooru"}]}, {"nameIdentifiers": [{"nameIdentifier": "58", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "Nitta, Isami"}]}, {"nameIdentifiers": [{"nameIdentifier": "44765", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "Yoshida, Hidetoshi"}]}]}, "item_5_publisher_7": {"attribute_name": 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"is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 1100000.0, "url": {"label": "3_0002.pdf", "url": "https://niigata-u.repo.nii.ac.jp/record/3698/files/3_0002.pdf"}, "version_id": "8bb33a89-36bc-437b-9bcd-8870ce93d0a8"}]}, "item_keyword": {"attribute_name": "\u30ad\u30fc\u30ef\u30fc\u30c9", "attribute_value_mlt": [{"subitem_subject": "Material Testing", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Measuring Method", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Young\u0027s Modulus of Plastics", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Spherical Indenter Mean Strain Rate", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Performance of Hardness Machine", "subitem_subject_scheme": "Other"}]}, "item_language": {"attribute_name": "\u8a00\u8a9e", "attribute_value_mlt": [{"subitem_language": "jpn"}]}, "item_resource_type": {"attribute_name": "\u8cc7\u6e90\u30bf\u30a4\u30d7", "attribute_value_mlt": 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