Stress and Slippage Distributions Under Track Belt Running on a Weak Terrain

Abstract

The distributions of slippage, normal stress and shear resistance occurred on the interface between track belt with grousers and terrain should be analysed in detail to determine the Traffic performance of tracked vehicle running on a weak terrain. Here, on the basis of track model test results, those distributions under rigid tracked vehicle with regular triangular type grousers running on a super weak marine sediment are analysed theoretically at driving and braking state. It is clarified that, at driving state, the amount of slippage under the track belt is positive and increases linearly to the rear end, and the normal stress and the shear resistance on the bottom-dead-center of frontidler become larger than those of rear sprocket with the increment of slip ratio due to the decreasing eccentricity. And at braking state, the amount of slippage and the shear resistance change from positive values to negative ones at some point on the main straight part of track belt or on the contact part of frontidler due to the slip ratio, while the distribution of normal stress is almost invariable with slip ratio.