Bending Strength and Effective Modules of Songhua River Ice

Abstract

River ice exists in the most countries and regions and brings much damage to the structures in the river. However, the mechanical properties of the river ice are still unclear. In the present study, over 150 specimens of river ice taken from Songhua River of China have been investigated using the MTS machine to measure the flexural strength and the effective modules at various test temperature and strain rate. The test temperature was set at three different point (-5°C,-10°C,-20°C), the strain rate was set at the range from 3.33E-5/S to 3.33E-3/S. The test results show that the flexural strength of river ice depends on the temperature and strain rate. It increases with the decreasing test temperature. The flexural strength of river ice changes at the various strain rate, however, it is non-monotonic. The variation curve looks like a inversed "W" shape. Under flexural loading condition, the effective modules of Songhua River ice is about 0.568~0.825GPa. And The modules of river ice increases with the increasing of the strain rate. The effective modules of river ice also increases with the decreasing of the test temperature slightly.