MODULAR BLAST-RESISTANT PANEL SYSTEM FOR REINFORCING EXISTING STRUCTURES

• US 20090090236A1
• Filed: 10/03/2007
• Published: 04/09/2009
• Est. Priority Date: 10/03/2007
• Status: Active Grant

• Current Assignee: Martin Marietta Materials Incorporated (Martin Marietta Composites Incorporated)
• Original Assignee: Martin Marietta Materials Incorporated (Martin Marietta Composites Incorporated)
• Inventors: Peterson, Paul W. JR., Misencik, Stephen
• Granted Patent: US 7,980,165 B2
• Time in Patent Office: Days
• US Class Current: 89/36.02
• CPC Class Codes: E04H 9/10 Independent shelters; Arrangement of independent splinter-proof walls
• CPC Class Codes: F41H 5/013 Mounting or securing armour plates
• CPC Class Codes: F41H 5/04 composed of more than one layer outerwear resistant to mechanical aggressions A41D31/24; layered products B32B; shaping reinforced articles B29C67/00
• CPC Class Codes: F41H 5/0421 Ceramic layers in combination with metal layers
• CPC Class Codes: F41H 5/0428 Ceramic layers in combination with additional layers made of fibres, fabrics or plastics
• CPC Class Codes: F41H 5/0457 Metal layers in combination with additional layers made of fibres, fabrics or plastics
• CPC Class Codes: F42D 5/045 Detonation-wave absorbing or damping means

Abstract

Various embodiments of the present invention provide a blast-resistant reinforcement assembly and/or system for engaging a surface of an existing structure to protect the structure from an applied force, such as an explosive detonation. The assembly includes one or more energy absorbing panels that may be attached to the structure. The energy absorbing panels include a core material configured to absorb some portion of the applied force by pulverizing in response to the applied force. In some embodiments, the energy absorbing panels also include one or more ballistic-resistant composite panels configured to protect the core material and the underlying existing structure from debris. Some embodiments further provide one or more energy deflecting panels engaged with the plurality of energy absorbing panels so as to be disposed between the energy absorbing panels and the location of the applied force for at least partially deflecting the applied force.

Claims

1. A blast-resistant panel assembly adapted to be operably engaged with an existing structural element to protect the existing structural element from an applied force, the panel assembly comprising:

a first ballistic-resistant composite panel;

a second ballistic-resistant composite panel disposed substantially parallel to and spaced apart from the first ballistic-resistant composite panel; and

an energy absorbing core operably engaged between the first ballistic-resistant composite panel and the second ballistic-resistant composite panel, the energy absorbing core being formed of a material that absorbs at least a portion of the applied force.

2. A panel assembly according to claim 1, wherein at least one of the first ballistic-resistant composite panel and the second ballistic-resistant composite panel comprise a material selected from the group consisting of:

a fiber reinforced polymer material;

a fiber reinforced polymer composite;

a solid laminate; and

combinations thereof.

3. A panel assembly according to claim 2, wherein the fiber reinforced polymer comprises a fiber selected from the group consisting of:

s-glass;

aramid fiber;

carbon;

polyethylene;

polybenzoxazole;

nylon;

steel wire;

polyester cord; and

combinations thereof.

4. A panel assembly according to claim 3, wherein the fiber reinforced polymer comprises a resin selected from the group consisting of:

vinyl ester resin;

epoxy;

phenolics; and

combinations thereof.

5. A panel assembly according to claim 1, wherein the energy absorbing core comprises a pulverizable material suspended in a matrix material.

6. A panel assembly according to claim 5, wherein the pulverizable material comprises a particulate.

7. A panel assembly according to claim 5, wherein the pulverizable material is selected from the group consisting of:

pumice;

perlite;

urethane foam;

PVC foam;

aluminum foam;

aluminum honeycomb;

balsa; and

combinations thereof.

8. A panel assembly according to claim 1, further comprising an energy deflecting panel operably engaged with the second ballistic-resistant composite panel, the energy deflecting panel being configured to deflect the applied force substantially laterally and away from the existing structural element.

9. A panel assembly according to claim 8, wherein the energy deflecting panel comprises a sacrificial material that cracks in response to the applied force, the sacrificial material being selected from the group consisting of:

granite;

quartz composite;

steel;

aluminum;

manganese;

ceramic;

fiber reinforced polymer material comprising a fiber component disposed substantially within a resin component; and

combinations thereof.

10. A panel assembly according to claim 8, further comprising a foam panel disposed between the energy deflecting panel and the second ballistic resistant panel.

11. A panel assembly according to claim 10, wherein the foam panel comprises a syntactic foam material.

12. An assembly according to claim 8, wherein the energy deflecting panel comprises a plurality of substantially rigid particles at least partially suspended in a substantially elastic matrix such that the applied force is at least partially deflected by a movement of the plurality of substantially rigid particles within the substantially elastic matrix in response to the applied force.

13. A panel assembly according to claim 1, further comprising an aperture defined therein for receiving a connector for operably engaging the assembly with a surface of the existing structural assembly.

14. A panel assembly according to claim 1, further comprising a bracket disposed between the existing structural assembly and the first ballistic-resistant composite panel for operably engaging the assembly with a surface of the existing structural assembly, wherein the surface is substantially perpendicular to the assembly.

15. A panel assembly according to claim 1, further comprising an adhesive layer disposed between the ballistic-resistant composite panels and the energy absorbing core for adhering the ballistic-resistant composite panels to the energy absorbing core.

16. A panel assembly according to claim 8, further comprising an adhesive layer disposed between the second ballistic-resistant composite panel and the energy deflecting panel for adhering the second ballistic-resistant composite panel to the energy deflecting panel.

17. A panel assembly according to claim 1, wherein the a first ballistic-resistant composite panel, the second ballistic-resistant composite panel, and the energy absorbing core are substantially flat so as to be adapted to be operably engaged with an existing structural element having a substantially flat surface.

18. A panel assembly according to claim 1, wherein the a first ballistic-resistant composite panel, the second ballistic-resistant composite panel, and the energy absorbing core are curved so as to be adapted to be operably engaged with an existing structural element having a curved surface.

19. A panel assembly according to claim 1, further comprising a substantially compliant material disposed on at least one side of the energy deflecting panel for absorbing at least a portion of the applied force.

20. A panel assembly according to claim 19, wherein the substantially compliant material is selected from the group consisting of:

rubber;

polyurea coating; and

combinations thereof.

21. A blast-resistant panel assembly adapted to be operably engaged with an existing structural element to protect the existing structural element from an applied force, the panel assembly comprising:

a first ballistic-resistant composite panel;

a second ballistic-resistant composite panel disposed substantially parallel to and spaced apart from the first ballistic-resistant composite panel;

an energy absorbing core operably engaged between the first ballistic-resistant composite panel and the second ballistic-resistant composite panel, the energy absorbing core being formed of a syntactic foam material or a pulverizable material suspended in a matrix material; and

an energy deflecting panel operably engaged with the second ballistic-resistant composite panel, the energy deflecting panel comprising a sacrificial material that cracks in response to the applied force, the sacrificial material being selected from the group consisting of;

granite;

quartz composite;

steel;

aluminum;

manganese;

ceramic;

fiber reinforced polymer material comprising a fiber component disposed substantially within a resin component; and

combinations thereof.

22. A blast-resistant panel assembly adapted to be operably engaged with an existing structural element to protect the existing structural element from an applied force, the panel assembly comprising:

a first ballistic-resistant composite panel;

a second ballistic-resistant composite panel disposed substantially parallel to and spaced apart from the first ballistic-resistant composite panel;

an energy absorbing core operably engaged between the first ballistic-resistant composite panel and the second ballistic-resistant composite panel, the energy absorbing core being formed of a syntactic foam material or a pulverizable material suspended in a matrix material; and

an energy deflecting panel operably engaged with the second ballistic-resistant composite panel, the energy deflecting panel comprising a plurality of substantially rigid particles at least partially suspended in a substantially elastic matrix such that the applied force is at least partially deflected by a movement of the plurality of substantially rigid particles within the substantially elastic matrix in response to the applied force.

23. A blast-resistant panel assembly adapted to be operably engaged with an existing structural element to protect the existing structural element from an applied force, the panel assembly comprising:

a first ballistic-resistant composite panel;

a second ballistic-resistant composite panel disposed substantially parallel to and spaced apart from the first ballistic-resistant composite panel;

an energy absorbing core operably engaged between the first ballistic-resistant composite panel and the second ballistic-resistant composite panel, the energy absorbing core being formed of a material that absorbs at least a portion of the applied force;

an energy deflecting panel operably engaged with the second ballistic-resistant composite panel, the energy deflecting panel comprising a sacrificial material that cracks in response to the applied force, the sacrificial material being selected from the group consisting of;

granite;

quartz composite;

steel;

aluminum;

manganese;

ceramic;

fiber reinforced polymer material comprising a fiber component disposed substantially within a resin component; and

combinations thereof; and

a panel comprising a syntactic foam material disposed between the energy deflecting panel and the second ballistic-resistant panel.

24. A blast-resistant panel assembly adapted to be operably engaged with an existing structural element to protect the existing structural element from an applied force, the panel assembly comprising:

a first ballistic-resistant composite panel;

a second ballistic-resistant composite panel disposed substantially parallel to and spaced apart from the first ballistic-resistant composite panel;

an energy absorbing core operably engaged between the first ballistic-resistant composite panel and the second ballistic-resistant composite panel, the energy absorbing core being formed of a material that absorbs at least a portion of the applied force;

an energy deflecting panel operably engaged with the second ballistic-resistant composite panel, the energy deflecting panel comprising a plurality of substantially rigid particles at least partially suspended in a substantially elastic matrix such that the applied force is at least partially deflected by a movement of the plurality of substantially rigid particles within the substantially elastic matrix in response to the applied force; and

a panel comprising a syntactic foam material disposed between the energy deflecting panel and the second ballistic-resistant panel.

25. A reinforcement system for increasing blast-resistance of an existing structure, wherein the reinforcement system is adapted to be operably engaged with an interior surface of the structure to protect the structure from an applied force originating from a location inside the structure, the system comprising:

a plurality of energy absorbing panels adapted to be operably engaged with the interior surface of the structure, each of the plurality of energy absorbing panels comprising an energy-absorbing core formed of a material that absorbs at least a portion of the applied force; and

a plurality of energy deflecting panels configured to be operably engaged with the plurality of energy absorbing panels and disposed between the plurality of the energy absorbing panels and the location of the applied force.