The fracture toughness of sea ice is an important parameter to analyze ice load on offshore structures,and also affects the sea ice dynamics,such as sea ice breakage,rafting and ridging,etc.In this study,sea ice samples were collected in the Liaodong Bay of Bohai Sea in the winter of 2011—2012.The values of sea ice fracture toughness KIC were tested under different ice temperatures,salinities and loading rates with bending tests of three loading points.The results show that the brine volume(as a function of...