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Critical Stress Intensity Factor (KIc) Measurements at High Loading Rates for Polycrystalline Ice

  • D. J. Goodman
Part of the International Union of Theoretical and Applied Mechanics book series (IUTAM)

Abstract

In this paper results are presented from experiments to measure KIc the critical stress intensity factor, at -4, -11, and -24°C. Rectangular bars with a slot ending in a sharp crack in one side were broken in four point bending. The mean values were 118 ± 32 kN m-3/2 (44 samples) at -4°C, 119 ± 34 KN m-3/2 (40 samples) at -11°C, and 108 ± 21 KN m-3/2 (44 samples) at -24°C. These agree well with the results of other studies, and show that G, the strain energy release rate is close to twice the surface energy, Γ (overall mean for KICis 115 KN m-3/2, implies G equals 1.38 Jm-2 compared to 0.2 Jm-2 for 2Γ.

Some preliminary results from the measurement of crack opening displacement are also presented.

Keywords

Fracture Toughness Stress Intensity Factor Plastic Zone Crack Opening Displacement Linear Elastic Fracture Mechanic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag, Berlin, Heidelberg 1980

Authors and Affiliations

  • D. J. Goodman
    • 1
  1. 1.Physics and Chemistry of Solids Cavendish LaboratoryCambridgeUK

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