Isogrid

Isogrid is a type of partially hollowed-out structure formed usually from a single metal plate with integral triangular stiffening stringers.

[citation needed] A similar variant is the orthogrid (sometimes called a waffle grid), which uses rectangular rather than triangular openings.

[6] [7] Since the equilateral triangle pattern has isotropic strength characteristics (no preferential direction), it was named isogrid.

[8] A major push has been made toward additive manufacturing techniques due to a decrease in overall material and production costs and high efficiency and accuracy while providing control over parameters like porosity.

[11] Isogrid panels form self-stiffened structures where low weight, stiffness, strength and damage tolerance are important, such as in aircraft or space vehicles.