中文摘要：

应用数字图像处理技术，结合有限元建模方法，建立了包舍集料、空隙和胶浆在内的沥青混合料有限元模型，并模拟研究了沥青混合料劈裂试验过程中，由于空隙分布、加载方向以及集料与胶浆模量比等指标的变化对沥青混合料内部微观力学特性的影响，发现沥青混合料中空隙与集料颗料的分布对最大拉应力分布有很大影响，集料与胶浆模量比的变化则只影响最大拉应力值的大小而不影响其出现的位置。结果表明，该方法可进一步推广应用于不同条件下沥青混合料微观力学响应仿真。

英文摘要：

This combined with paper studied the mic finite element modeli romechanics behavior in asphalt mixture by digital processing ng techniques. The finite element model of asphalt mixture with aggregate, air void, and asphalt mastic were established, the indir mixture were simulated with consideration of air void distribution, diff and eifferent aggregate-asphalt modulus ratios. It is pointed that the dis aggregates has significant effects on the maximum tension stress distribu ect tensile test erent loading d tribution of air of asphalt irections, voids and tion; however, the chan ges in aggregate-asphalt modulus ratio only have influence on the value of the maximum tension stress, not on the location of the maximum tension stress. The results indicate that the proposed method can be extended to the numerical simulations of asphalt concrete micromechanics behavior with viscoelastic and fracture mechanics. 5 figs, 8 refs.