文献一覧: 柳田明 (著者)

1 0 0 0 OS0805 ECAEプロセスのシミュレーションにおける摩擦モデル

著者: アギアルデソウザヴィニシウス渡邊育夢柳田明
出版者: 一般社団法人日本機械学会
雑誌: M&M材料力学カンファレンス
巻号頁・発行日: vol.2013, pp._OS0805-1_-_OS0805-3_, 2013

The purpose of this study is to improve and extend a method to estimate the friction coefficient in equal channel angular extrusion (ECAE) including cases with back pressure. Employing three dimensional finite element analysis (FEA) and Coulomb friction model with truncated shear stress, the relationship between the friction coefficient and the reaction force is investigated in ECAE with back pressure. Additionally, the deformation state of the billet after ECAE and the pressing load are compared between the experiment and the simulation results with the same friction coefficient for validation of the numerical model.

2022-03-21 05:30:08
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1 0 0 0 関東地域3支部新進部会若手学生研究交流会第2部:「京浜工業地帯夜景見学スプリングナイトクルーズ」

著者: 柳田明
出版者: 一般社団法人日本塑性加工学会
雑誌: 塑性と加工 (ISSN:00381586)
巻号頁・発行日: vol.56, no.656, pp.784, 2015

2022-03-09 13:30:08
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1 0 0 0 IR 文化財担当者研修の概要紹介-2017・2018年度の中から-

著者: 独立行政法人国立文化財機構奈良文化財研究所埋蔵文化財センター高妻洋成こうづまようせい Kouzuma Yousei 金田明大かねだあきひろ Kaneda Akihiro 松田和貴まつだかずたか Matsuda Kazutaka 箱崎和久はこざきかずひさ Hakozaki Kazuhisa 星野安治ほしのやすはる Hoshino Yasuharu 村田泰輔むらたたいすけ Murata Taisuke 山崎健やまざきたけし Yamazaki Takeshi 柳田明進やなぎだあきのぶ Yanagida Akinobu 馬場基ばばはじめ Baba Hajime 脇谷草一郎わきやそういちろう Wakiya Souichirou 田村朋美たむらともみ Tamura Tomomi
出版者: 独立行政法人国立文化財機構奈良文化財研究所埋蔵文化財センター
雑誌: 埋蔵文化財ニュース (ISSN:03893731)
巻号頁・発行日: no.176, pp.1-22, 2019-03-28

2021-05-12 04:15:16
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https://ci.nii.ac.jp/naid/120006866444

1 0 0 0 海底遺跡における銅製文化財の腐食が抑制される発掘後の埋め戻し法の検討

著者: 柳田明進池田榮史脇谷草一郎松田和貴髙妻洋成
出版者: 日本銅学会
雑誌: 銅と銅合金 (ISSN:13477234)
巻号頁・発行日: vol.59, no.1, pp.167-172, 2020

To evaluate the corrosion mechanism of copper artifacts and to propose the effective reburial method that suppresses the corrosion of copper artifacts at the underwater archaeological site, corrosion tests were carried out at the Takashima underwater archaeological site using copper and copper with wood. The results of the corrosion test specified that corrosion proceeded by the effect of H2S or HS–even in dissolved oxygen (DO)–depleted conditions at the underwater archaeological site. In the case of the copper with wood, the corrosion rate dramatically increased in comparison with the copper samples due to the effects of wood as nutrient salt for sulfate–reducing bacteria. These results indicate that it is necessary to control the mass transfer of chemical species like H2S, HS–, and Cu+ for suppression of corrosion of copper artifacts at underwater in addition to DO–depleted conditions. The results of the study also suggest that covering copper artifacts using porous media like sandy soil is an effective means for the preservation of them.

2020-12-01 23:37:37
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1 0 0 0 海底遺跡における銅製文化財の腐食が抑制される発掘後の埋め戻し法の検討

著者: 柳田明進池田榮史脇谷草一郎松田和貴髙妻洋成
出版者: 日本銅学会
雑誌: 銅と銅合金 (ISSN:13477234)
巻号頁・発行日: vol.59, no.1, pp.167-172, 2020 (Released:2020-11-19)
参考文献数: 10

To evaluate the corrosion mechanism of copper artifacts and to propose the effective reburial method that suppresses the corrosion of copper artifacts at the underwater archaeological site, corrosion tests were carried out at the Takashima underwater archaeological site using copper and copper with wood. The results of the corrosion test specified that corrosion proceeded by the effect of H2S or HS–even in dissolved oxygen (DO)–depleted conditions at the underwater archaeological site. In the case of the copper with wood, the corrosion rate dramatically increased in comparison with the copper samples due to the effects of wood as nutrient salt for sulfate–reducing bacteria. These results indicate that it is necessary to control the mass transfer of chemical species like H2S, HS–, and Cu+ for suppression of corrosion of copper artifacts at underwater in addition to DO–depleted conditions. The results of the study also suggest that covering copper artifacts using porous media like sandy soil is an effective means for the preservation of them.