Unexpected Phenomena in Multilayered Copper Subjected to Plane Strain Compression
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概要
- 論文の詳細を見る
Pure copper rectangular blocks are simply set in a multilayered manner without bonding and compressed up to 50% reduction in height per operation in the plane strain condition. When as-received copper (Cu-H) or precompressed dead-soft copper (Cu-O) is compressed, the interfaces of such multilayered blocks turn into extremely wavy surfaces, while those of virgin Cu-O blocks remain almost flat. This phenomenon may be a kind of diffuse-type instability depending on the work-hardening property (i. e., n-value) of the material. This phenomenon appears more markedly when an aluminum sheet is inserted between the interfaces. When the interface of the two layered blocks becomes saw-toothed, its waviness after compression is reduced to a comparable extent. Furthermore, when two blocks are designed in an hourglass or barrel-type, the interface remains a little wavy with no instability for both specimens with flat and saw-toothed interfaces. The saw-teeth of the interface surprisingly grow in height and width with compression particularly in the central portion of the interface of the barrel-type two-block specimen, inducing complete bonding of the blocks. Finally, when Cu-O severely precompressed up to 87. 5% (-2.1 in log strain) is tested as 8-layered blocks, the specimen fractures along a plane oblique to the compression axis before further deformation. This phenomenon may be a kind of localized (shear band) -type instability.
- 一般社団法人日本機械学会の論文
- 1993-04-15
著者
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Yamashita Minoru
Department Of Mechanical Engineering Gifu University
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Yamashita Minoru
Department Of Mechanical & Systems Engineering Gifu University
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Gotoh M
Gifu‐univ. Gifu Jpn
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Gotoh Manabu
Department Of Mechanical & Systems Engineering Gifu University
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Torii Naoshi
Hitachi Seisakusho Co., Ltd.
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Torii Naoshi
Hitachi Seisakusho Co. Ltd.
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