Comparative study of the brittle-ductile transition between level ice and rafted ice based on uniaxial compression experiments Online publication date: Thu, 29-Sep-2022
by Xiaodong Chen; Anliang Wang; Shunying Ji
International Journal of Materials and Structural Integrity (IJMSI), Vol. 14, No. 2/3/4, 2021
Abstract: To investigate the difference between level and rafted ice, field tests were performed on both level ice and artificial rafted ice in the Bohai Sea. In this area, the level ice owns a typical S2 columnar structure while the artificial rafted ice displays a 'sandwich' structure consisting of a strong upper part, weak lower part, and freeze bonding in the middle. Both types of ice were subjected to a compressive load that was applied in parallel to the grain columns. Both ice types failed in ductile mode at low strain rate, and brittle mode at high strain rate. The sandwich structure does not influence the compressive strength of the rafted ice in the ductile mode. The rafted ice is severely weakened by failure in brittle mode. The two types of ice have similar strength in ductile failure mode, while the rafted ice is significantly weaker in brittle failure mode.
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