Unit cell structures including stiffening patterns

A structure surrounding a gas turbine, comprising:

• a first plurality of unit cells;
• a second plurality of unit cells, the first plurality of unit cells offset from the second plurality of unit cells with respect to a neutral plane to increase a moment of inertia of the structure, ones of the first plurality of unit cells alternating with ones of the second plurality of unit cells to define the structure such that the unit cells are laterally adjacent, and the first and second pluralities of unit cells are offset from each other and with respect to the neutral plane that defines a center line through the structure;
• and
• a plurality of nodes joining the first plurality of unit cells with the second plurality of unit cells.

A unit cell structure of an aircraft component, comprising;

• a first plurality of unit cells;
• a second plurality of unit cells offset from the first plurality of unit cells in a first direction, the first plurality of unit cells and second plurality of unit cells forming opposing surfaces, ones of the first plurality of unit cells alternating with ones of the second plurality of unit cells such that the unit cells are laterally adjacent, the first and second surfaces offset from each other and with respect to a neutral plane that defines a center line through the unit cell structure;
• and
• a plurality of nodes joining the first plurality of unit cells and the second plurality of unit cells to stiffen the unit cell structure.

An additively manufactured monolithic isogrid structure, comprising:

• a first plurality of trigonal unit cells disposed on a first side of a neutral plane for bending of the isogrid structure;
• a second plurality of trigonal unit cells disposed on a second side of the neutral plane, the second side opposite the first side;
• a plurality of nodes;
• and
• a plurality of transition edges, the plurality of nodes and the plurality of transition edges connecting the first and second pluralities of unit cells.