摘要
离散元颗粒流软件PFC已被众多领域引入以探索非连续颗粒介质力学性质及辅助宏观本构模型的研究,但尚未对PFC作为筑坝粗粒料性质研究工具的适应性进行系统性分析。结合潘口面板堆石坝硅质岩主堆料一组典型的三轴压缩试验曲线,按照一般颗粒材料模拟方式标定了PFC细观颗粒参数,从压硬性、弹塑性、应力引起的各向异性及剪胀性等方面论证了其用于筑坝粗粒料性质研究的适应性,并追踪了受力变形过程中颗粒间相互作用及细观组构的变化。限于颗粒形状及破碎的模拟能力,现阶段PFC虽不能完美再现三轴试验曲线,但可作为以往主要靠宏观唯象法描述粗粒料性质的有力补充。
The DEM software PFC is applied to research the mechanical properties of non-continuum granular media and auxiliary macroscopic constitutive model.But the adaptability of PFC used as a tool for dam construction coarse-grained material is not systematically analyzed.Combined with Pankou CFRD siliceous main rockfill triaxial test curve,the microscopic parameters are calibrated.The applicability of PFC to pressure-sensitivity,dilatancy,elastoplasticity and stress-induced anisotropy is verified.The main advantage is that the mechanism of interaction between particles can be captured.It expands research approaches of coarse-grained materials and can be used as a strong supplementary for macroscopic phenomenology.
出处
《水电能源科学》
北大核心
2012年第10期72-75,共4页
Water Resources and Power
基金
中国水电顾问集团华东勘测设计研究院基金资助项目(KY2010-02-14
KY2010-02-11)
关键词
PFC
粗粒料
压硬性
弹塑性
各向异性
剪胀性
适应性
PFC
coarse-grained material
pressure-sensitivity
elastoplasticity
anisotropy
dilatancy
adaptability
