ABSTRACT
Such a structure resists compressive loading when the load is applied along the surface in the direction of the straight lines. However, the surface is easily deformed from convex to concave (and vice-versa) when loaded perpendicularly to the straight line of the surface. Designing an efficient shell structure requires guiding the force flow along (and not perpendicular to) the straight lines. The efficiency of the design depends directly on the minimum of effort used to achieve this control of the force-flow. The mechanical behavior of the surface is thus directly dependent on the geometry of the surface.
