Foldable composite structures

1. A method for fabricating a composite structure, comprising:

selectively applying a rigidifying substance to a sheet of composite material to define a plurality of hinges;

allowing the rigidifying substance to cure;

folding the sheet of composite material along the hinges to form a planar flat pack; and

unfolding the planar flat pack into the composite structure, the composite structure being three-dimensional,

wherein unfolding the planar flat pack into the composite structure comprises folding the sheet of composite material along the hinges to form the three-dimensional composite structure.

2. The method of claim 1 , wherein the composite material is a textile-based composite.

3. The method of claim 1 , wherein the composite material is a fiber-reinforced-polymer (FRP).

4. The method of claim 3 , wherein the composite material is a dry fiber reinforcement fabric.

5. The method of claim 1 , further comprising:

applying a masking material to the sheet of composite material before applying the rigidifying substance; and

removing the masking material before folding the sheet of composite material.

6. The method of claim 1 , wherein allowing the polymer to cure comprises curing the rigidifying substance over time at ambient temperature.

7. The method of claim 1 , further comprising:

applying a coating to the hinges after the planar flat pack is unfolded to form the composite structure.

8. The method of claim 1 , wherein the rigidifying substance is selectively applied using a printer.

9. The method of claim 1 , wherein the rigidifying substance is selectively applied by a robotic arm of an automated machine.

10. The method of claim 1 , wherein unfolding the planar flat pack comprises defining a plurality of surface segments with the hinges between adjacent surface segments, the plurality of surface segments forming the composite structure.

11. The method of claim 1 , further comprising:

returning the three-dimensional composite structure to the planar flat pack.

12. A method for fabricating a composite structure, comprising:

laying out flat a sheet of composite material;

masking a plurality of locations of hinges on the sheet of composite material using a masking material;

applying a polymer to a face of the sheet of composite material;

curing the polymer;

removing the masking material; and

folding the sheet of composite material along the hinges to form the composite structure,

wherein the composite structure is a structural building component,

wherein the hinges are curved, and

wherein the composite structure has a non-zero Gaussian curvature.

13. The method of claim 12 , further comprising:

folding the composite structure into a flat pack configuration to transport the composite structure.

14. The method of claim 12 , further comprising:

joining the sheet of composite material with a second sheet of composite material.

15. The method of claim 12 , further comprising:

applying a coating to the composite structure after the sheet of composite material is folded to form the composite structure.

16. The method of claim 12 , wherein the composite structure is a reusable framework for a concrete structure.

17. The method of claim 12 , wherein the composite structure is a stay-in-place framework for a concrete structure.

18. The method of claim 12 , further comprising:

spraying one or more surfaces of the composite structure with concrete.

19. A method for fabricating a composite structure, comprising:

laying out flat a sheet of composite material;

masking a plurality of locations of hinges on the sheet of composite material using a masking material;

applying a polymer to a face of the sheet of composite material;

curing the polymer;

removing the masking material;

folding the sheet of composite material along the hinges to form the composite structure; and

spraying one or more surfaces of the composite structure with concrete,

wherein the composite structure is a structural building component.