Fig. 2: Fracture path engineering using the data-driven damage-programmable (DP) metamaterials.
From: Damage-programmable design of metamaterials achieving crack-resisting mechanisms seen in nature
a The design of DP metamaterials based on the desired fracture geometries, where \({f}_{3D}(x,\,y)\) represents the function of the 3D crack geometry defined in Supplementary Note 4, \(S\) is the size of the 3D design space and test metamaterial chunk. b Experimentally observed fracture path of the DP metamaterials and the digital image correlation (DIC) analysis of the controlled fracture propagation. The white arrows indicate the visualized overall crack path according to the location of fractured DP cells on the front surfaces of the sample, based on experimental captures (on the sample image) and strain field (on the DIC result). The DP metamaterial images are captured by camera during the fracture experiments. c The strains in the guiding and background regions of the DP metamaterials. Source data are provided as a Source Data file.
