Abstract: In this paper, the failure criterion of ice is adopted to define the user-defined material (UMAT) of Abaqus. The UMAT is first proved to be correct through a simple simulation example. Then, the simulation of a single ice element pressed by a rigid plate is performed, and the reaction curve of force-displacement is obtained through simulation. Finally, by simulating the interaction between the ice and a rigid cylinder surface, the relation between the thickness of ice and the reaction force is analyzed, which is shown to be linear. The results presented in this paper indicate that it is feasible to simulate the mechanical properties of ice by the user-defined material, and this finding provides valuable references to future researches concerning large-scale ice-structure interaction.