This paper presents the development of a procedure for calculating the dynamic J-R curve from the load-displacement trace of a pressed-notch drop-weight-tear test specimen. The slope of the JM -R curves generated provides technical insight into the range of steady-state propagation that occurs during these experiments. The slope of the JM-R curve (dJM/da) is compared to visually measured crack-tip-opening angle values and conclusions about the relationship between these parameters and the steady-state crack propagation resistance are made. These results are key in the development of a procedure to predict axial crack arrest in gas pipelines from laboratory specimen data.
Characterizing dynamic fracture toughness of linepipe steels using the pressed-notch drop-weight-tear test specimen
Engineering Fracture Mechanics ; 71 , 16-17 ; 2533-2549
2004
17 Seiten, 23 Quellen
Article (Journal)
English
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