基于离散元模拟的沥青混合料单轴压缩试验细观力学分析

发布时间：2018-03-04 06:08

本文选题：沥青混合料　切入点：单轴压缩试验　出处：《南京工业大学学报(自然科学版)》2015年05期 　论文类型：期刊论文

【摘要】：通过FISH语言编程建立沥青混合料AC-16二维离散元模型,模拟了AC-16单轴压缩试验的全过程,研究了在单轴压缩试验过程中应力-应变、接触力分布、颗粒位移、接触压力和接触拉力的变化情况。研究结果表明:在单轴压缩试验过程中,随着轴向应变的增大,试件中接触压力和接触拉力的分布由密集逐渐变稀疏,并且接触压力和接触拉力集中现象逐渐减少;随着轴向应变的增加,整个试件中、集料和沥青砂浆之间、沥青砂浆之间以及集料之间的接触压力个数比例都逐渐减小,接触拉力个数比例都逐渐增大,并且,整个试件中、集料和沥青砂浆之间、沥青砂浆之间以及集料之间的接触压力均值和接触拉力均值都先增加后减小。
[Abstract]:The AC-16 two-dimensional discrete element model of asphalt mixture was established by FISH language, and the whole process of AC-16 uniaxial compression test was simulated. The stress-strain, contact force distribution, particle displacement during uniaxial compression test were studied. The results show that the distribution of contact pressure and contact tension becomes sparse with the increase of axial strain during uniaxial compression test. With the increase of axial strain, the number ratio of contact pressure between aggregate and asphalt mortar, between asphalt mortar and aggregate, and between aggregate and aggregate is gradually decreased with the increase of axial strain, and the concentration of contact pressure and contact tension decreases gradually, and with the increase of axial strain, the ratio of contact pressure between aggregate and asphalt mortar, between asphalt mortar and aggregate decreases gradually. The number of contact tension increases gradually, and the average contact pressure and contact tension between aggregate and asphalt mortar, asphalt mortar and aggregate increase first and then decrease.
【作者单位】：南京工业大学交通学院;
【基金】：国家自然科学基金(51108237)
【分类号】：U414

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