2026-03-06T00:14:58Z https://kanazawa-u.repo.nii.ac.jp/oai

oai:kanazawa-u.repo.nii.ac.jp:00008780 2024-06-25T05:52:05Z 4163:4171:4187

青熱脆性を考慮した広い温度域に適用可能な炭素鋼の構成式 Temperature Dependent Constitutive Equation for Carbon Steels with Consideration of Blue Brittleness Tachiya, Hiroshi Aramoto, Teppei Takagi, Kouji Hojo, Akihiro Chatani, Akiyoshi 10216989 立矢, 宏 新本, 哲平 高木, 幸司 80019778 放生, 明廣 30019731 茶谷, 明義 Copyright © The Japan Society of Mechanical Engineers 日本機械学会 This paper presents a temperature dependent static constitutive equation for carbon steels, which can be applied for wide temperature range involving the range where blue brittleness occurs. Generally, a stress induced in steel at a certain strain decrees with the temperature. However, the occurrence of blue brittleness of steels increases the values of work hardening. As a result, the stresses increase with the temperature due to the blue brittleness. Thus, the stress-strain relation-ships of steels seemingly have negative dependence to the temperature within the range involving the blue brittleness. Since this phenomenon arises remarkably at static strain-rate, the present paper has proposed a temperature dependent static constitutive equation. Concretely, the paper decomposes the stress-strain relation of steels into an unaffected part and affected part by the blue brittleness, and derives equations revealing those parts respectively. The proposed constitutive equation is expressed by the sum of them. The paper actually obtains unknown material constants involved in the proposed equations by a nonlinear least squares from measured results and confirms the appropriateness of the proposed constitutive equation over the wide temperature range. 金沢大学高度モビリティ研究所 / 金沢大学理工研究域機械工学系 The Japan Society of Mechanical Engineers = 日本機械学会 2005-03-25 2017-10-03 jpn journal article VoR https://doi.org/10.24517/00008767 http://hdl.handle.net/2297/36729 https://kanazawa-u.repo.nii.ac.jp/records/8780 10.24517/00008767 10.1299/kikaia.71.435 https://www.jstage.jst.go.jp/browse/kikaia1979/-char/ja/ http://www.jsme.or.jp/ http://ci.nii.ac.jp/naid/110004998961 AN0018742X 0387-5008 日本機械学會論文集 A編 = Transactions of the Japan Society of Mechanical Engineers Series A 71 703 435 442 https://kanazawa-u.repo.nii.ac.jp/record/8780/files/TE-PR-TACHIYA-H-435.pdf application/pdf 4.6 MB 2017-10-03