Modular fiber reinforced polymer composite structural panel system

• US 6,309,732 B1
• Filed: 06/01/1998
• Issued: 10/30/2001
• Est. Priority Date: 06/02/1997
• Status: Expired due to Term

• Current Assignee: West Virginia University
• Original Assignee: West Virginia University Research Corporation (West Virginia University)
• Inventors: Lopez-Anido, Roberto A., Hota, GangaRao V. S.
• Primary Examiner(s): LONEY, DONALD J
• Application Number:
  US09/088,147
• Time in Patent Office: 1,247 Days
• Field of Search: 428/99, 428/117, 428/118, 428/178, 428/212, 428/179, 428/33, 428/116, 527/931, 527/931.1, 525/862, 525/861
• US Class Current: 428/178
• CPC Class Codes: B32B 3/20 of hollow pieces, e.g. tubes; of pieces with channels or cavities
• CPC Class Codes: B32B 3/28 characterised by a layer comprising a deformed thin sheet , i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled B32B29/08 takes precedence
• CPC Class Codes: E01D 19/125 Grating or flooring for bridges waterproofing thereof E01D19/083; floors in general E04B5/00
• CPC Class Codes: E01D 2101/40 Plastics
• CPC Class Codes: E04C 2/22 reinforced E04C2/205 takes precedence
• CPC Class Codes: E04C 2/246 combinations of materials fully covered by E04C2/16 and E04C2/20
• CPC Class Codes: E04C 2/34 composed of two or more spaced sheet-like parts E04C2/32 takes precedence; spacers for cavity walls E04B2/44
• CPC Class Codes: Y10T 428/24149 Honeycomb-like
• CPC Class Codes: Y10T 428/24661 Forming, or cooperating to form cells

Abstract

A modular fiber reinforced polymer (FRP) composite structural panel component for structural support systems having a plurality of cells adjacently connected forming a top side, a bottom side, a first edge side and a second edge side. Each cell is defined by at least four sides, wherein at least two adjacent sides intersect at an obtuse angle resulting in the first edge side and the second edge side providing a means for joining two panel components and having an extensive bonding surface. A structural panel component is comprised of a plurality of layers of multi-axial fiber reinforcement, e.g., multi-axial fabrics, mats, woven cloth and unidirectional rovings, and a resin matrix, and the layers are continuous throughout the shape of the cells and a structural panel component. The structural panel component is manufactured using the Vacuum Assisted Resin Transfer Molding or pultrusion process. Two structural panel components are joined by placing the components along side each other and using an adhesive along the extensive bonding surface. A mechanical fastener also may be used to hold two structural panel components together. An overlay may be placed over the top of one or more structural panel components joined together thereby providing a uniform surface. In addition, one or more exterior FRP composite laminates, grids, plates or fabrics may be bonded continuously to said top side. In certain embodiments, one or more cells of a structural panel component may be filled with a filler, e.g., thermal insulation, noise reduction insulation, or a strength enhancement.

Claims

1. A modular fiber reinforced polymer (FRP) composite structural panel component, comprising:

a plurality of cells adjacently and integrally connected forming a top side, a bottom side, a first edge side and a second edge side, each said cell having an internal space and a shape, wherein said shape is a hexagon being of triangular shape having chopped off corners, resulting in each said cell having three long sides and three short sides, each of said long sides intersecting two of said short sides at an obtuse angle;

a means for integrating said top side with one said long side and two said short sides of at least one said cell; and

a means for integrating said bottom side with one said long side and two said short sides of at least one said cell;

wherein adjacent said cells are inverted, resulting in said first edge side and said second edge side providing a means for joining two said structural panel components and having an extensive bonding surface,

wherein said cells are comprised of a plurality of layers of multi-axial fiber reinforced fabric adhered together by a resin matrix said layers of fabric being continuous throughout the shape of each said cell of the FRP composite structural panel component,

wherein said top side, said bottom side, said first edge side and said second edge side are integrated into the modular FRP composite structural panel component.

2. The modular FRP composite structural panel component according to claim 1, wherein each said layer of multi-axial fiber reinforced fabric is selected from the group of multi-axial stitched fabrics, continuous strand rovings, continuous strand mats, chopped strand mats, woven cloth and unidirectional rovings.

3. The modular FRP composite structural panel component according to claim 1, wherein said means for joining is a shear key system and an adhesive bond along said extensive bonding surface.

4. The modular FRP composite structural panel component according to claim 1, wherein said means for joining is a shear key system and a mechanical fastener.

5. The modular FRP composite structural panel component according to claim 1 further comprising an overlay placed over said top side such that said top side is covered by a uniform surface.

6. The modular FRP composite structural panel component according to claim 1, further comprising one or more exterior FRP composite laminates, grids, plates or fabrics bonded continuously to said top side.

7. The modular FRP composite structural panel component according to claim 1, wherein the structural panel component comprises three said cells.

8. The modular FRP composite structural panel component according to claim 1, wherein one or more of said layers of multi-axial fiber reinforced fabric comprises a fiber material selected from the group of glass, carbon, aramid, and jute.

9. The modular FRP composite structural panel component according to claim 1, further comprising a filler in said internal space of one or more said cells.

10. The modular FRP composite structural panel component according to claim 9, wherein said filler is selected from the group of thermal insulation, noise reduction insulation, and a strength enhancement.

11. The modular FRP composite panel component according to claim 1, wherein the modular FRP composite panel component has an increased load capacity to weight reduction ratio within the range of about 300:

20 to about 400;

20.

12. The modular FRP composite panel component according to claim 1, wherein stresses resulting from a weight load applied to said top side is transferred through the shape of each said cell, thereby eliminating any individual stress points.