Abstract
The evaluated method in engineering for ice load caused by the interaction of ice and structures is according to the compressive strength of ice. The test of interaction of ice and piles indicated that the majority of failures of ice sheets is mainly due to bending. Since the ice cannot avoid existing flaws and cracks, then if the loading rate is large the ice expresses brittle behavior, hence, it is reasonable to evaluate the strength of sea ice in accordance with the fracture toughness K IC which is determined on the basis of linear elastic fracture mechanics. This paper states the principle and method of studies for mode I and mode II fracture toughness K IC and K IIC . The data obtained already by the author indicate that at 253 K, K IC and K IIC do not vary with the stress intensity factor rate, K I and K II . Because the acting conditions of ice load are very complicated, in order to determine what fracture criterion would be suitable, the study of fracture problems of I-II mixed mode is necessary. The results obtained previously indicated that they coincide with the criterion established from the strain energy density factor theorem. The author had considered that during the interaction of ice and piles, the mode I fracture failure of ice is sometimes due to eccentric compression, so a concept of using the Compact Compression Test Specimen for the test of fracture toughness K IC had been suggested, and some corresponding evaluation and analysis had been made. Some preliminary results had been obtained, which will be discussed.
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Shen, W., Lin, S.Z., Gu, P., Zhou, X.A. (1991). The Study of Fracture Toughness of Bohai Sea Ice. In: Jones, S., Tillotson, J., McKenna, R.F., Jordaan, I.J. (eds) Ice-Structure Interaction. International Union of Theoretical and Applied Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-84100-2_9
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DOI: https://doi.org/10.1007/978-3-642-84100-2_9
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