Core material for composite structures

A composite sandwich structure, comprising:

• a skin;
• a core panel adhered to the skin, the core panel including a plurality of cell walls defining a plurality of core cells, the plurality of cell walls extending across a thickness of the core panel, the plurality of core cells including one or more defined structural nonuniformities resulting in nonuniform properties of the core panel;
• and
• one or more end flanges disposed at a cell wall of the plurality of cell walls, the one or more end flanges oriented towards an opening of at least one of the plurality of core cells disposed adjacent to the cell wall;
• wherein a first portion of the core panel comprises a first material having a first strength;
• wherein a second portion of the core panel comprises a second material different from the first material, the second material having a second strength different from the first strength according to a structural load requirement for the composite sandwich structure;
• and
• wherein the second portion of the core panel extends from the first portion of the core panel.

A composite sandwich structure, comprising:

• a skin;
• a core panel adhered to the skin, the core panel including a plurality of cell walls defining a plurality of core cells, the plurality of cell walls extending across a thickness of the core panel, the plurality of core cells including one or more defined structural nonuniformities resulting in nonuniform properties of the core panel;
• and
• one or more end flanges disposed at a cell wall of the plurality of cell walls, the one or more end flanges oriented towards an opening of at least one of the plurality of core cells disposed adjacent to the cell wall;
• wherein a first portion of the core panel comprises a first material having a first damping capacity;
• wherein a second portion of the core panel comprises a second material different from the first material, the second material having a second damping capacity;
• wherein the first damping capacity differs from the second damping capacity according to a design requirement to control vibration through the composite sandwich structure;
• and
• wherein the second portion of the core panel extends from the first portion of the core panel.