Surface modified unit cell lattice structures for optimized secure freeform fabrication

摘要

Aspects of the present disclosure relate generally to preparing models of three-dimensional structures. In particular, a model of a three-dimensional structure constructed of porous geometries is prepared. A component file including a porous CAD volume having a predefined portion of a boundary. A space including the porous CAD volume is populated with unit cells overlapping the predefined portion of the boundary. The unit cells are populated with porous geometries having a plurality of struts having nodes on each end. At least a first strut overlaps the predefined portion of the boundary and has a length, a first node outside the porous CAD volume, and a second node inside the porous CAD volume. All struts entirely outside the porous CAD volume are removed. After removal of the struts entirely outside the porous CAD volume, each of the remaining struts is connected to a node at each end thereof.

主权项

1. A method of preparing a computer-generated model of a three-dimensional structure constructed of porous geometries, the method comprising: preparing a computer-generated component file including a porous computer-aided design volume having a boundary having at least one predefined portion; populating, by a processor, a space including the porous computer-aided design volume with unit cells overlapping the at least one predefined portion of the boundary; populating, by a processor, the unit cells with porous geometries, the porous geometries having a plurality of struts having opposing ends, each end being connected at a node, the plurality of struts including at least a first strut overlapping the predefined portion of the boundary, the first strut further having a length, a first node outside the porous computer-aided design volume, and a second node inside the porous computer-aided design volume; and removing all struts entirely outside the porous computer-aided design volume, such that each end of the remaining struts remains connected at the node.