On the accuracy of measurement and calibration of load signal in the instrumented Charpy impact test

Toshiro Kobayashi, Naoya Inoue, Shigeki Morita, Hiroyuki Toda

研究成果: ジャーナルへの寄稿会議記事査読

7 被引用数 (Scopus)

抄録

Significant variation in measured load of an instrumented Charpy impact test is observed if specimen materials or sizes are changed from the standard specimen. Load calibration factors for different materials and sizes of specimens are evaluated by means of both experiments and finite element analysis. Elastic finite element analysis shows that the strain fields in the instrumented striker in contact with different materials and sizes of specimens are not exactly the same as those for the standard specimen. As a result of experiment and analysis, the decrease in stiffness or size of specimens results in a decrease in the calibration factor. Those are attributable to strain localization near the region in which the strain gage is attached. Therefore, the measured load for low-stiffness materials or miniaturized specimens is overestimated when the decrease of calibration factor is disregarded. Those results strongly suggest that the system must be calibrated for the different materials and sizes of specimens to obtain accurate toughness data.

本文言語英語
ページ(範囲)198-209
ページ数12
ジャーナルASTM Special Technical Publication
1380
DOI
出版ステータス出版済み - 1月 1 2000
外部発表はい
イベントThe 1999 Symposium on 'Pendulum Impact Testing: A Century of Progress' - Seattle, WA, USA
継続期間: 5月 19 19995月 20 1999

!!!All Science Journal Classification (ASJC) codes

  • 工学(全般)

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