ENVIRONMENTAL ROBUSTNESS

• Significantly higher damage tolerance than honeycomb sandwich
• Tendency to contain delamination to within one cell (open cell feature)
• Do not absorb and retain water over their lifetime, unlike honeycomb sandwich structures.

LOW-COST MANUFACTURING
Automated and single cure process (not hand operations are involved)

STRUCTURAL EFFICIENCY

• Stiffer in plane and less stiff out-of-plane: a grid structure design tends to be preferable when deflection or fundamental frequency requirements govern the design space. Sandwich structure designs are preferable when global buckling is the driving factor
• From 20% up to 61% lighter, 300% stronger, and 1000% stiffer than the aluminum structure it replaces
• Thermal stability

• the orthogrid made by the intersection of horizontal rings and vertical hoops (Fig. 1);
• the diamond grid made by the intersection of helicoidal ribs (Fig. 1);
• the isogrid made by the intersection of helicoidal ribs and horizontal rings (Fig. 3);
• the triangle & rectangle grid made by the intersection of helicoidal ribs, horizontal rings and vertical hoops (Fig. 4);
• the kagome grid, similar to the isogrid, having the horizontal rings do not intersect the helicoidal ribs in their point of intersection, in this way the pattern is a hexagon with 6 triangles build on his sides (Fig. 5).

3D isogrid structure view - BUCKLING ANALYSIS made with Nastran Patran