Abstract: In order to realize the simulation of the process of hail against the leaves, which is different from the fabric crushing simulation, this paper presents a realistic dynamic simulation technology of the interaction between leaves and hail based on physical theory. It opens up a different area from the cloth tearing simulation and proposes the simulation algorithm of the leaf breaking, which provides the foundation for further research on the influence of leaf veins on leave’s force-bearing capability. The tearing of the leaves is due to the hail being attracted by the gravitation of the ground, transferring the energy of the hail to the leaves, and the interaction between the two can be well simulated by an efficient technique. The technology is specifically designed to simulate the tearing of objects with less elastic forces such as leaves. When hail interacts with the leaves, the forces due to the hail velocity are translated into lateral and longitudinal spring forces on the leaves, causing the leaves to break. Experimental results show that this technique can effectively and realistically simulate the effect of hail impact on leaves and restore the situation of hail disasters.

Key words: dynamic tearing of leaves, simulation, mass-spring model, collision detection