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A sandwich structure includes a first skin, a second skin, a first hinge member, and a second hinge member. The first hinge member may be movably coupled to the first skin and a first skin joint. The second hinge member may be movably coupled to the second skin and second skin joint. The first hinge

A sandwich structure includes a first skin, a second skin, a first hinge member, and a second hinge member. The first hinge member may be movably coupled to the first skin and a first skin joint. The second hinge member may be movably coupled to the second skin and second skin joint. The first hinge member and the second member may be movably coupled to one another and a member joint located between the first and second skin joint.

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1. A sandwich structure, comprising: a first skin and a second skin arranged on top of one another and separated from one another by a hinge assembly sandwiched between the first and second skin to form the sandwich structure having a closed cross-section, the hinge assembly comprising; a first hing

1. A sandwich structure, comprising: a first skin and a second skin arranged on top of one another and separated from one another by a hinge assembly sandwiched between the first and second skin to form the sandwich structure having a closed cross-section, the hinge assembly comprising; a first hinge member and a second hinge member each being configured as at least one of the following: a bar, and a shear panel;the first hinge member having a proximal end movably coupled to the first skin at a first skin joint;the second hinge member having a proximal end movably coupled to the second skin at a second skin joint;the first hinge member extending outwardly at a non-perpendicular angle from the first skin and terminating at a distal end;the second hinge member extending outwardly at a non-perpendicular angle from the second skin and terminating at a distal end;the distal end of the first hinge member being movably coupled to the distal end of the second hinge member at a member joint located between the first and second skin; anda plurality of movable joints connecting the proximal end of the first and second hinge member respectively to the first and second skin, and the member joint connecting the distal ends of the first and second hinge member to one another, the plurality of movable joints and the member joint being configured as hinged couplings including at least one of the following: a universal joint, a ball and socket, a clevis fitting, and a pivoting hinge;the first skin is expandable relative to the second skin in a circumferential direction of the sandwich structure, the circumferential direction circumscribing a central axis;the first and second hinge member moving in response to expansion of the first skin relative to second shin in the circumferential direction;the first skin moving relative to the second skin in a radial direction in response to expansion of the first skin relative to the second skin in the circumferential direction;the hinge assembly preventing movement of the first skin relative to the second skin in the circumferential direction while: allowing movement of the first skin relative to the second skin in the radial direction; andallowing movement of the first skin relative to the second skin in a longitudinal direction, the longitudinal direction being parallel to the central axis. 2. The sandwich structure of claim 1, wherein: the first and second skin joint respectively defining a first and second axis;the member joint defining a member axis; andthe first axis, the second axis, and the member axis being substantially parallel to one another. 3. The sandwich structure of claim 1, wherein: the first and second hinge member comprise the hinge assembly;the sandwich structure including a pair of the hinge assemblies attached to the first and second skin; andthe pair of the hinge assemblies being mounted in back-to-back arrangement. 4. The sandwich structure of claim 1, wherein: the first and second hinge member collectively comprise the hinge assembly; andthe hinge assemblies being arranged in series in the sandwich structure. 5. The sandwich structure of claim 1, wherein: at least one of the first and second hinge member is comprised of at least two bars forming a triangular subassembly;the at least two ban having a proximal end and a distal end;the proximal end of each one of the bars being coupled to a corresponding one of the first and second skins at the corresponding first and second skin joint; andthe distal end of each one of the bars being coupled to one another at the member joint. 6. The sandwich structure of claim 5, wherein; each one of the first and second hinge member comprises a triangular subassembly; andthe triangular subassemblies being coupled at the member joint and forming a pyramidal assembly. 7. The sandwich structure of claim 1, wherein; at least one of the first and second skin has at least one stiffener mounted thereto; andthe stiffener comprising at least one of a longitudinal stiffener and a transverse stiffener. 8. The sandwich structure of claim 1, wherein: the closed cross-section being a circular cross-section. 9. The sandwich structure of claim 1, wherein: the hinge members are aligned with a deflection trajectory of the first skin as the first skin moves relative to the second skin in response to differential heating of the first and second skin. 10. The sandwich structure of claim 1, further comprising: a temperature management system mounted within the sandwich structure and being configured to circulate coolant for absorbing heat of the sandwich structure. 11. The sandwich structure of claim 1, wherein the sandwich structure forms at least one of the following: an engine exhaust nozzle;a thermal protection system; andan attachment between a tank and a structure. 12. An engine exhaust nozzle, comprising: a sandwich structure having a closed cross-section and including: a first skin and a second skin arranged on top of one another and separated from one another by a hinge assembly sandwiched between the first and second skin, the hinge assembly including: a first hinge member and a second hinge member each being configured as at least one of the following: a bar, and a shear panel;the first hinge member having a proximal end movably coupled to the first skin at a first skin joint;the second hinge member having a proximal end movably coupled to the second skin at a second skin joint;the first hinge member extending outwardly at a non-perpendicular angle from the first skin and terminating at a distal end;the second hinge member extending outwardly at a non-perpendicular angle from the second skin and terminating at a distal end;the distal end of the first hinge member being movably coupled to the distal end of the second hinge member at a member joint located between the first and second skin; anda plurality of movable joints connecting the proximal end of the first and second hinge member respectively to the first and second skin, and the member joint connecting the distal ends of the first and second hinge member to one another, the plurality of movable joints and the member joint being configured as hinged couplings including at least one of the following: a universal joint, a ball and socket, a clevis fitting, and a pivoting hinge;the first skin is expandable relative to the second skin in a circumferential direction of the sandwich structure, the circumferential direction circumscribing a central axis;the first and second hinge member moving in response to expansion of the first skin relative to second skin in the circumferential direction;the first skin moving relative to the second skin in a radial direction in response to expansion of the first skin relative to the second skin in the circumferential direction;the hinge assembly preventing movement of the first skin relative to the second skin in the circumferential direction while: allowing movement of the first skin relative to the second skin in the radial direction; andallowing movement of the first skin relative to the second skin in a longitudinal direction, the longitudinal direction being parallel to the central axis. 13. A method of minimizing loads in a sandwich structure, comprising the steps of: providing a first skin and a second skin arranged on top of one another and being separated from one another by a hinge assembly sandwiched between the first and second skin to form the sandwich structure having a closed cross-section defining a central axis, the hinge assembly comprising: a first hinge member and a second hinge member each being configured as at least one of the following: a bar, and a shear panel;the first hinge member having a proximal end movably coupled to the first skin at a first skin joint;the second hinge member having a proximal end movably coupled to the second skin at a second skin joint;the first hinge member extending outwardly at a non-perpendicular angle from the first skin and terminating at a distal end;the second hinge member extending outwardly at a non-perpendicular angle from the second skin and terminating at a distal end;the distal end of the first hinge member being movably coupled to the distal end of the second hinge member at a member joint between the first and second skin; anda plurality of movable joints connecting the proximal end of the first and second hinge member respectively to the first and second skin, and the member joint connecting the distal end of the first and second hinge member to one another, the plurality of movable joints and the member joint being configured as hinged couplings including at least one of the following: a universal joint, a ball and socket, a clevis fitting, and a pivoting hinge;expanding the first skin relative to the second skin in a circumferential direction of the sandwich structure, the circumferential direction circumscribing the central axis;moving the first and second hinge member in response to expanding the first skin relative to second skin in the circumferential direction;moving the first skin relative to the second skin in a radial direction in response to expansion of the first skin, relative to the second skin in the circumferential direction; andpreventing rotation of the first skin relative to the second skin in the circumferential direction while: allowing movement of the first skin relative to the second skin in the radial direction; andallowing movement of the first skin relative to the second skin in a longitudinal direction, the longitudinal direction being parallel to the central axis. 14. The method of claim 13, wherein the first and second skin joint have a respective first and second axis, the member joint defining a member axis, the method further comprising the step of: orienting at least two of the following axes in parallel relation to one another; the first axis, the second axis, and the member axis. 15. The method of claim 13, further comprising the step of: forming at least one of the first and second hinge member as a triangular subassembly comprised of at least two bars;the at least two bars having a proximal end and a distal end;the proximal end of each one of the at least two bars being coupled to a corresponding one of the first and second skin at the corresponding first and second skin joint; andthe distal end of each one of the at least two bars being coupled to one another at the member joint. 16. The method of claim 13, further comprising the step of: forming each one of the first and second hinge member as a triangular subassembly; andcoupling the triangular subassembly to form a pyramidal assembly. 17. The method of claim 13, wherein the step of expanding the first skin relative to the second skin in the circumferential direction comprises: expanding the first skin relative to the second skin in response to differentially heating the first and second skin. 18. The method of claim 13, wherein the step of expanding the first skin relative to the second skin in the circumferential direction comprises: providing at least one of the first and second skin as a wall of a pressurized tank; andexpanding the first skin relative to the second skin in response to a change in an internal pressure of the tank. 19. The method of claim 13, further comprising the step of: stiffening at least one of the first and second skins using at least one stiffener. 20. The method of claim 13, further comprising the step of: aligning the hinge member with a deflection trajectory of the first skin; andthe deflection trajectory comprising a direction of movement of the first skin relative to the second skin along the radial direction. 21. The method of claim 13, further comprising the step of: circulating coolant through a temperature management system mounted within the sandwich structure. 22. A method of operating an aircraft engine, comprising the steps of: providing au aircraft engine including a closed cross-section nozzle having a sandwich structure comprising a first skin and a second skin arranged on top of one another and being separated from one another by a hinge assembly sandwiched between the first and second skin, the hinge assembly comprising: a first hinge member and a second hinge member each being configured as at least one of the following: a bar, and a shear panel;the first hinge member having a proximal end movably coupled to the first skin at a first skin joint;the second hinge member having a proximal end movably coupled to the second skin at a second skin joint;the first hinge member extending outwardly at a non-perpendicular angle from the first skin and terminating at a distal end;the second hinge member extending outwardly at a non-Perpendicular angle from the second skin and terminating at a distal end;the distal end of the first hinge member being movably coupled to the distal end of the second hinge member at a member joint located between the first and second skin; anda plurality of movable joints connecting the proximal end of the first and second hinge member respectively to the first and second skin, and the member joint connecting the distal end of the first and second hinge member to one another, the plurality of movable joints and the member joint being configured as hinged couplings including at least one of the following: a universal joint, a ball and socket, a clevis fitting, and a pivoting hinge;operating the aircraft engine causing the first skin to expand relative to the second skin in a circumferential direction of the sandwich structure and causing movement of the member joint in a radial direction, the circumferential direction circumscribing a central axis; andmoving the first and second hinge member in response to expansion of the first skin relative to second skin in the circumferential direction;moving the first skin relative to the second skin in the radial direction as a result of expansion of the first skin relative to the second skin in the circumferential direction;preventing movement of the first skin relative to the second skin in the circumferential direction while: allowing movement of the first skin relative to the second skin in the radial direction; andallowing movement of the first skin relative to the second skin in a longitudinal direction, the longitudinal direction being parallel to the central axis. 23. A method of fabricating a sandwich structure, comprising the steps of: providing a first skin and a second skin arranged on top of one another and separated from one another by a hinge assembly sandwiched between the first and second skin forming the sandwich structure having a closed cross-section, the hinge assembly comprising: a first hinge member and a second hinge member each being configured as at least one of the following; a bar, and a shear panel;the first hinge member having a proximal end movably coupled to the first skin at a first skin joint;the second hinge member having a proximal end movably coupled to the second skin at a second skin joint;the first hinge member extending outwardly at a non-perpendicular angle from the first skin and terminating at a distal end;the second hinge member extending outwardly at a non-perpendicular angle from the second skin and terminating at a distal end; andthe distal end of the first hinge member being movably coupled to the distal end of the second hinge member at a member joint located between the first and second skin;a plurality of movable joints connecting the proximal end of the first and second hinge member respectively to the first and second skin, and the member joint connecting the distal end of the first and second hinge member to one another, the plurality of movable joints and the member joint being configured as hinged couplings including at least one of the following: a universal joint, a ball and socket, a clevis fitting, and a pivoting hinge;the first skin is expandable relative to the second skin in a circumferential direction of the sandwich structure, the circumferential direction circumscribing a central axis;the first and second hinge meaner being movable in response to expansion of the first skin relative to second skin in the circumferential direction;the first skin being movable relative to the second skin in a radial direction in response to expansion of the first skin relative to the second skin in the circumferential direction;the hinge assembly preventing movement of the first skin relative to the second skin in the circumferential direction while: allowing movement of the first skin relative to the second skin in the radial direction; and,allowing movement of the first skin relative to the second skin in a longitudinal direction, the longitudinal direction being parallel to the central axis.