Composite live hinge
A hinged component includes first and second portions of material coupled together by a composite live hinge. The live hinge includes a layer of tensile fabric and a layer of elastomer interposed between the tensile fabric and the material of one or both of the coupled first and second portions. The composite live hinge is capable of joining structural composite materials without the need for scoring, and thereby weakening, the structural composite material along the desired hinge line. The live hinge can be embedded in the materials it joins in a method that is compatible with traditional structural composite layup processes and in a manner which prevents resin from the structural composite materials from infiltrating the tensile fabric and compromising its flexibility.
1. A hinged component, comprising:
a first portion of material;
a second portion of material;
a first layer of elastomer;
a live hinge attaching the first and second portions of material together at a hinge region, the live hinge comprising a layer of tensile fabric at least partially infiltrated by at least part of the first layer of elastomer;
at least part of the first layer of elastomer being interposed between the tensile fabric and material of the first and second portions;
at least one of the portions of material including a structural composite comprising reinforcing fibers in a polymer matrix; and
the first layer of elastomer being co-cured with at least one of the portions of material.
2. The hinged component of claim 1 , wherein the first layer of elastomer and at least one of the first and/or second portions of material are cross-linked together by covalent bonds.
3. The component of claim 1 , wherein the reinforcing fibers and the tensile fabric are different material types.
4. The component of claim 1 , wherein the first layer of elastomer and at least one of the first and second portions of material are cross-linked together where the live hinge is attached to each of the first and second portions.
5. The component of claim 1 , wherein the tensile fabric is a polymeric mesh material.
6. The component of claim 1 , wherein the first layer of elastomer comprises a fluoroelastomer.
7. The hinged component of claim 1 , wherein:
the live hinge includes a second layer of elastomer; and
the tensile fabric is interposed between the first layer of elastomer and the second layer of elastomer, each of the first and second layers of elastomer being interposed between the tensile fabric and the materials of the first and second portions of material where the live hinge is attached to each of the first and second portions.
8. The hinged component of claim 1 , wherein the live hinge includes one end attached to the first portion of material and an opposite end attached to the second portion of material, and at least one of the ends is at least partially embedded in the respective portion of material.
9. The hinged component of claim 1 , wherein the live hinge includes one end attached to the first portion of material and an opposite end attached to the second portion of material, and the first layer of elastomer extends between the ends.
10. The hinged component of claim 1 , wherein the layer of tensile fabric and the first layer of elastomer are coextensive.
11. The hinged component of claim 8 , wherein opposite ends of the live hinge are embedded in the respective first and second portions of material and a central portion of the live hinge is exposed.