关键词: 非线性模型, 有限单元, 大、小主应力, 砂砾石

Abstract: The mixture of aggregate has non-linear property, in this paper takes the modulus of elasticity as the function of main and minor stress. Through the finite element model and ordinary tests, get the main and minor stress of each element, and then find the parameters of the model. The result show that the model in this paper suits the mechanics characteristic of the pavement better, and has high theory value in non-linear pavement analysis

Key words: non-linear model, finite element, main minor stress, aggregate