EVALUATION OF DYNAMIC FRACTURE TOUGHNESS PARAMETERS BY INSTRUMENTED CHARPY TEST.

Toshiro Kobayashi, Isamu Yamamoto, Mitsuo Niinomi

研究成果: Article査読

4 被引用数 (Scopus)

抄録

This paper presents methods to determine two fracture mechanics parameters using load-deflection curves obtained from an instrumented Charpy test. Two fracture mechanics parameters are dynamic fracture toughness (J//d) and material tearing modulus (T//m//a//t). J//d is fracture resistance at crack initiation and it is necessary to detect the crack initiation point on the load-deflection curve for measurement of this value. On the other hand, T//m//a//t is a parameter to characterize a stable crack growth and it is necessary for this to estimate an amount of crack extension. In this study, it is attempted, for the measurement of J//d, to detect the crack initiation point by calculating the compliance change rate from a loaded-deflection curve. Next, the J- TRIAN OP a curve is estimated by using a key curve method and T//m//a//t is determined from its slope. In addition, T//m//a//t is evaluated by combining Kaiser's rebound compliance with Paris-Hutchinson's T//a//p//p equation. The above results are compared with those of the stop block test (which is a multiple specimens technique). Rather good agreement is ascertained.

本文言語English
ページ(範囲)1934-1940
ページ数7
ジャーナルTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
71
16
DOI
出版ステータスPublished - 1985 1 1

ASJC Scopus subject areas

  • 凝縮系物理学
  • 物理化学および理論化学
  • 金属および合金
  • 材料化学

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