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论文类型：会议论文

发表时间：2019-06-09

收录刊物：EI

卷号：2019-June

摘要：The tensile strength is a fundamental mechanical property of sea ice and is a key parameter for the designing of structures in ice infected waters. To study the tensile strength, the Brazilian tests were carried out on the granular structure ice in the Bohai Sea. Under concentrated loads, the discs are assumed to carry and later to be failed from strong tension stresses. The tests were performed on the ice samples with various thicknesses, temperatures and loading speeds. The ice texture, salinity and density were also measured. In all the experiments the ice samples were failed in splitting manner. The results show that the tensile strength has weak dependency on the loading speed and sample thickness. On the other hand, the tensile strength increased from 0.44MPa to 1.4MPa with total porosity decreased from 75   to 10  . Compared with previous tests based on uniaxial tension tests, the results have a similar trend. However, the values of granular ice are between that of horizontal orientated and vertical orientated columnar ice. It means that under tension granular ice is stronger than columnar ice in horizontal orientation but weaker than that in vertical orientation. This study has identified that the Brazilian tests provide expected ice failure pattern and desirable results. It could be an efficient alternative for tensile strength measurement. ? 2019, Lulea University of Technology. All rights reserved.