Grassl Peter, Bolander John
School of Engineering, University of Glasgow, Glasgow G12 8LT, UK.
Department of Civil and Environmental Engineering, University of California, Davis, CA 95616, USA.
Materials (Basel). 2016 Sep 19;9(9):782. doi: 10.3390/ma9090782.
Dual three-dimensional networks of structural and transport elements were combined to model the effect of fracture on mass transport in quasi-brittle geomaterials. Element connectivity of the structural network, representing elasticity and fracture, was defined by the Delaunay tessellation of a random set of points. The connectivity of transport elements within the transport network was defined by the Voronoi tessellation of the same set of points. A new discretisation strategy for domain boundaries was developed to apply boundary conditions for the coupled analyses. The properties of transport elements were chosen to evolve with the crack opening values of neighbouring structural elements. Through benchmark comparisons involving non-stationary transport and fracture, the proposed dual network approach was shown to be objective with respect to element size and orientation.
将结构和传输单元的双重三维网络相结合，以模拟裂缝对准脆性地质材料中质量传输的影响。代表弹性和断裂的结构网络的单元连通性由一组随机点的德劳内三角剖分定义。传输网络内传输单元的连通性由同一组点的沃罗诺伊剖分定义。开发了一种新的域边界离散化策略，用于在耦合分析中应用边界条件。选择传输单元的属性以随相邻结构单元的裂缝开口值演变。通过涉及非稳态传输和断裂的基准比较，结果表明所提出的双重网络方法在单元尺寸和方向方面是客观的。
