An open source software package to generate numerical model for finite element method (FEM) and discrete element method (DEM) based on digital image is proposed. Both 2D bitmap and 3D volumetric images are supported. This package includes geometrical and analytical routines for vectorizing bitmap image, computing geometric information statistics, and generating numerical models. The ability of handling complex connected region enables the modeling of heterogeneous materials with complex microstructure. Four examples have indicated that the code is robust, efficient, and user-friendly. As an open source and ready-to-use Matlab package, it has broad application prospect in mechanical behavior analysis for heterogeneous materials.

提出了一种基于数字图像的有限元法和离散元法数值模型的开源软件包。同时支持2D位图和3D体积图像。该软件包包括用于对位图图像进行矢量化，计算几何信息统计信息以及生成数值模型的几何和分析例程。处理复杂的连接区域的能力可以对具有复杂微观结构的异质材料进行建模。有四个示例表明该代码是健壮，高效和用户友好的。作为开源的即用型Matlab软件包，它在异质材料力学行为分析中具有广阔的应用前景。