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ID 34790
本文ファイル
著者
Yokoyama, Takashi
キーワード
Finite elements
Impact compression
Elastoplasticity
Viscoplastic response
Split Hopkinson pressure bar
Radial inertia
End friction
NDC
機械工学
抄録(英)
The split Hopkinson pressure bar (SHPB) technique has been used widely for the impact testing of materials in the strain-rate range from 10(2) to 10(4) s(-1). However, some specific problems still remain mainly concerning the effects of radial inertia and end friction in a cylindrical specimen on the accurate determination of dynamic stress-strain curves of materials. In this study, the basic principle of the SHPB technique is revisited based on energy conservation and some modifications are made considering radial momentum conservation. It is pointed out that the radial inertia and end friction effects are coupled to each other in the SHPB specimen. Computational simulations using the commercial finite element (FE) code ABAQUS/Explicit ver. 6.8 are conducted to check the validity of the modifications for ductile pure aluminum specimens. Both rate-independent and rate-dependent models are adopted for the test material. Simulations are performed by varying two different control parameters: a friction coefficient between the specimen and the pressure bars and a slenderness ratio of the specimen (or thickness to diameter ratio).
掲載誌名
Mechanics of Materials
51巻
開始ページ
97
終了ページ
109
出版年月日
2012
出版者
Elsevier B.V.
ISSN
0167-6636
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
(c) 2012 Elsevier B.V. All rights reserved.
関連情報URL
部局名
工学研究科