The uniaxial compressive strength of the Arctic summer sea ice

• Published in: Acta oceanologica Sinica Vol. 34; no. 1; pp. 129 - 136
• Main Authors: Han, Hongwei, Li, Zhijun, Huang, Wenfeng, Lu, Peng, Lei, Ruibo
• Format: Journal Article
• Language: English
• Published: Heidelberg The Chinese Society of Oceanography 2015; Springer Nature B.V; State Key Laboratory of Coastal and 0ffshore Engineering, Dalian University of Technology, Dalian 116024, China%School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China%Polar Research Institute of China, State 0ceanic Administration, Shanghai 200136, China
• Subjects: Brittleness; Climatology; Compressive properties; Compressive strength; Cooperation; Density; Ductile-brittle transition; Earth and Environmental Science; Earth Sciences; Ecology; Engineering Fluid Dynamics; Environmental Chemistry; Expeditions; Load distribution; Loading rate; Marine; Marine & Freshwater Sciences; Mathematical analysis; Oceanography; Porosity; Research expeditions; Salinity; Science; Sea ice; Summer; Temperature; Vertical loads; 加载速度; 北极科学考察; 单轴抗压强度; 夏季; 应力速率; 总孔隙率; 测试温度; 海冰; Arctic Ocean; China; Arctic region; PN, Arctic; Arctic sea ice; compressive strength; temperature; density; porosity
• ISSN: 0253-505X; 1869-1099
• DOI: 10.1007/s13131-015-0598-7

The results on the uniaxial compressive strength of Arctic summer sea ice are presented based on the sam- ples collected during the fifth Chinese National Arctic Research Expedition in 2012 （CHINARE-2012）. Exper- imental studies were carried out at different testing temperatures （-3, -6 and -9℃）, and vertical samples were loaded at stress rates ranging from 0.001 to 1 MPa/s. The temperature, density, and salinity of the ice were measured to calculate the total porosity of the ice. In order to study the effects of the total porosity and the density on the uniaxial compressive strength, the measured strengths for a narrow range of stress rates from 0.01 to 0.03 MPa/s were analyzed. The results show that the uniaxial compressive strength decreases linearly with increasing total porosity, and when the density was lower than 0.86 g/cm3, the uniaxial com- pressive strength increases in a power-law manner with density. The uniaxial compressive behavior of the Arctic summer sea ice is sensitive to the loading rate, and the peak uniaxial compressive strength is reached in the brittle-ductile transition range. The dependence of the strength on the temperature shows that the calculated average strength in the brittle-ductile transition range, which was considered as the peak uniaxial compressive strength, increases steadily in the temperature range from -3 to -9℃.