書誌事項
- タイトル別名
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- 234 Effect of strain rate change during impact tensile tests
抄録
In order to investigate the effect of strain rate change during dynamic tests on the stress-strain curves, an analytical study using the maximum load condition and a simple power law, σ = Bε^nε^m (ε: true strain rate, B, n, m: constants), as a constitutive equation was carried out. Three kinds of loading pulse, i.e. a usual constant incident pulse, an acceleration pulse and a deceleration pulse, were considered. It was found that the instability strain increases with the increase of acceleration parameter of loading pulses and strain rate sensitivity parameter of specimen materials. To check this analytical result, a series of dynamic tensile tests for 0.45%C steel and 2024 aluminum alloy using Hopkinson bar apparatus was performed with the three types of loading pulse. The experimental results agreed well with that predicted by the analysis.
収録刊行物
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- 機械材料・材料加工技術講演会講演論文集
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機械材料・材料加工技術講演会講演論文集 2000.8 (0), 243-244, 2000
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390001205878004608
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- NII論文ID
- 110002485380
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- ISSN
- 2424287X
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可