WO2008020843A1 - Réseaux polyédriques tridimensionnels - Google Patents

Réseaux polyédriques tridimensionnels Download PDF

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Publication number
WO2008020843A1
WO2008020843A1 PCT/US2006/031940 US2006031940W WO2008020843A1 WO 2008020843 A1 WO2008020843 A1 WO 2008020843A1 US 2006031940 W US2006031940 W US 2006031940W WO 2008020843 A1 WO2008020843 A1 WO 2008020843A1
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Prior art keywords
array
polyhedrons
polyhedron
connections
discrete
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PCT/US2006/031940
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English (en)
Inventor
Samuel J. Lanahan
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Lanahan Samuel J
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Application filed by Lanahan Samuel J filed Critical Lanahan Samuel J
Priority to PCT/US2006/031940 priority Critical patent/WO2008020843A1/fr
Priority to US11/579,307 priority patent/US20080040984A1/en
Publication of WO2008020843A1 publication Critical patent/WO2008020843A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/32—Arched structures; Vaulted structures; Folded structures
    • E04B1/3211—Structures with a vertical rotation axis or the like, e.g. semi-spherical structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
    • E02B3/129—Polyhedrons, tetrapods or similar bodies, whether or not threaded on strings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/343—Structures characterised by movable, separable, or collapsible parts, e.g. for transport
    • E04B1/34384—Assembling details for foldable, separable, collapsible or retractable structures
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/343—Structures characterised by movable, separable, or collapsible parts, e.g. for transport
    • E04B1/344—Structures characterised by movable, separable, or collapsible parts, e.g. for transport with hinged parts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/32—Arched structures; Vaulted structures; Folded structures
    • E04B2001/3223—Theorical polygonal geometry therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/32—Arched structures; Vaulted structures; Folded structures
    • E04B2001/3294—Arched structures; Vaulted structures; Folded structures with a faceted surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/003—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by using permeable mass, perforated or porous materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media

Definitions

  • This application relates to arrays, and in particular, arrays of materials comprised of a plurality of geometric polyhedrons and a connection network interconnecting the polyhedrons.
  • Choices of materials, and how given materials are arranged to achieve a resulting structure with desired characteristics, are key aspects of many innovations. Decisions about materials govern the built environment from large scale structures (e.g., buildings and roads), to common articles of a familiar scale and to new explorations in design of nanoscale, microscale and other small scale technologies.
  • Designing objects by specifying materials arranged in known arrays helps the designer predict the characteristics of the finished object. Using known arrays helps specify the design to those who assemble, build or configure it. Known arrays that follow regular patterns allow for more predictability of interactions at their boundaries, e.g., with other objects and/or the environment.
  • Buckminster Fuller among others, pioneered use of polyhedron-based structures that provided superior strength-to-weight ratios and other characteristics, particularly for architecture applications.
  • This prior work emphasized designs in which a predetermined number of polyhedral-based modules were assembled together, and in some cases, adjacent polyhedrons shared components with each other.
  • Applicant's prior U.S. Patent Application No. 10/932,403 which is incorporated herein by reference, discloses an array, referred to in some forms as a "structural fabric,” which is comprised of discrete icosahedral elements and interconnecting elements in tension that interconnect the icosahedral elements.
  • a structural fabric which is comprised of discrete icosahedral elements and interconnecting elements in tension that interconnect the icosahedral elements.
  • tension integrity By arranging the interconnecting elements primarily in tension, at least some of the properties of a tensegrity ("tension integrity") structure can be achieved.
  • the prior application emphasized use of icosahedrons and truncated icosahedrons, and arranging the interconnecting elements orthogonally relative to the icosahedral elements.
  • the prior application recognized the importance of providing a scalable design.
  • characteristics of structural materials in addition to their strength-to-weight ratio may also be important to a particular application.
  • Such characteristics may include, for example, optical, acoustical, electrical and chemical properties. While these properties may simply derive from the substance of which a structural material is made, they may also derive from a geometry, or a combination of substance and geometry. For example, much attention has been given to the potential of the carbon-60 (C 60 ) molecule (commonly known as the "Buckyball”) due to its unusual geometry that may have unique useful properties.
  • Some examples include: framework solids constructed from divalent transition metals and citric acid; formation of organic supramolecular structures via solid-state self-assembly of triphenol adducts; synthesis of ID and 2D (but not 3D) organic-inorganic infinitely extended structures through the linkage of rare earth metal-organic cations; self-assembly of novel metal-organic frameworks with aromatic polycarboxylates, bix and metal salts; self- assembly of supramolecular porphyrin arrays by hydrogen bonding; and co- crystallization of fullerenes and porphyrins into tapes, sheets and prisms due to weak C-F interactions. None of the prior efforts, however, has led to defining overall configurations of discrete polyhedral arrays with many advantages suitable for different applications in a wide range of technologies.
  • Described below are implementations of polyhedral arrays configured to allow the array as a whole to have desired properties and address some of the problems of prior approaches.
  • a polyhedral array comprises a plurality of discrete polyhedrons and a connection network.
  • the polyhedrons are spaced apart from each other at equilibrium in a predetermined generally regular pattern, and each polyhedron is comprised of edges, faces and vertices.
  • the connection network comprises connections extending along bias directions or radial directions to connect the polyhedrons. The connection network at least partially constrains the discrete polyhedrons with respect to each polyhedron's six degrees of freedom.
  • Each polyhedron's six degrees of freedom can be defined as the ability to translate in the X, Y and/or Z directions of a coordinate reference frame, and the ability to rotate about the X, Y and/or Z directions.
  • the polyhedrons in the array can be arranged in multiple, generally parallel layers.
  • the predetermined regular pattern in which the polyhedrons are arranged can include spaces occurring at generally regular uniform intervals.
  • the bias directions along which the connections extend intersect the first plane.
  • the bias directions can be oriented at angles of approximately 45 degrees to the first plane.
  • the polyhedrons are arranged in multiple layers, and the bias directions along which the connections extend are inclined at about 45 degrees relative to an expected direction of a resolved load on the array.
  • at least one of the connections in an array can extend between an edge of a first of the polyhedrons and an edge of a second of the polyhedrons.
  • at least one of the connections in an array can extend between a face of a first of the polyhedrons and a face of a second of the polyhedrons. It is also possible that at least one of the connections extends between a vertex of a first of the polyhedrons and a vertex of a second of the polyhedrons.
  • connections can have a first end connected to one type of connection feature (i.e., one of a face, an edge or a vertex), and a second end connected to a different type of connection feature (i.e., another of a face, an edge or a vertex).
  • one type of connection feature i.e., one of a face, an edge or a vertex
  • a different type of connection feature i.e., another of a face, an edge or a vertex
  • the array can be described as being coherent. In specific implementations, the array is omni-extensible. In specific implementations, an existing array can be increased in size by connecting additional discrete polyhedrons to existing discrete polyhedrons with additional connections without other modifications to the existing array.
  • Each discrete polyhedron in the array can be a finitely closed structure having structural integrity independent of the respective connections to which it is connected and independent of other discrete polyhedrons in the array.
  • Each polyhedron in the array occupies a unique location at equilibrium that can be specified with Cartesian coordinates.
  • the interconnecting network can be configured in a generally repeating pattern.
  • at least one of the connections can extend continuously, i.e., from a first polyhedron, to a second polyhedron and to an nth polyhedron.
  • the connections can comprise at least one of mechanical elements, bonds or guest molecules, ligands and ligatures.
  • the connections can comprise mechanical elements that have greater resiliency than the polyhedrons.
  • the connections can comprise mechanical elements that include spring-shaped portions.
  • At least one of the connections can have predetermined properties different from another of the connections.
  • At least one of the connections can have a property that varies along its length.
  • At least some of the connections can be compression members configured primarily to resist compression forces.
  • the array can be anisotropic, with at least one polyhedron having specific properties different from another of the plurality of polyhedrons.
  • the discrete polyhedrons can comprise a first material and the connections can comprise a second material different from the first material.
  • At least one of the plurality of polyhedrons can comprise a closed polyhedron having a majority of closed faces. At least one of the plurality of polyhedrons can comprise an open polyhedron each having a majority of open faces. The plurality of polyhedrons can comprise at least one interiorly hollow polyhedron. The plurality of polyhedrons can comprise at least one solid polyhedron.
  • Each polyhedron in the array can be described as satisfying the condition of having a face, an edge or a vertex approximately coincident with one of the six sides of a cube circumscribing the polyhedron.
  • At least one of the polyhedrons can be formed of two halves.
  • the polyhedron can be an icosahedron and have a geodesic saw tooth-shaped equator defining the two halves.
  • At least some of the polyhedrons are icosahedrons.
  • the plurality of polyhedrons includes at least one interior polyhedron connected to twelve adjacent polyhedrons.
  • the discrete polyhedrons can move relative to each other in response to applied loads, but remain spaced apart from each other at equilibrium and within a selected working load range.
  • a force above a predetermined working load range applied to the array can urge two adjacent polyhedrons from an equilibrium position in which the adjacent polyhedrons are separated from each other into an under load position in which the adjacent polyhedrons are in contact with each other.
  • a polyhedral array comprises a plurality of discrete polyhedrons that are spaced apart from each other at equilibrium in a predetermined generally regular pattern, each polyhedron being comprised of edges, faces and vertices, and a connection network interconnecting the discrete polyhedrons, the connection network comprising radial connections.
  • a first end of each radial connection and a corresponding first connection location on one of the polyhedrons can occupy a first plane, and a second end of each radial connection and a corresponding second connection location on another of the polyhedrons can occupy a second plane that is not parallel to the first plane.
  • the interconnecting network at least partially constrains the discrete polyhedrons relative to each polyhedron's six degrees of freedom.
  • the first and second planes of the respective first and second connection locations can be mutually orthogonal.
  • connections can be curved mechanical elements, and each curved mechanical element can have a first end connected to a first face of a first polyhedron and a second end connected to a second face of a second polyhedron, the first and second faces occupying different planes.
  • the array when the array is subjected to a load above a predetermined working load range, the array can deform such that at least two of the polyhedrons make face to face contact with each other.
  • the array when the array is subjected to a force or torque above a predetermined working range, the array deforms such that at least one of the polyhedrons undergoes a predetermined transformation in shape. At least one of the polyhedrons can be reversibly transformed such that the at least one of the polyhedrons returns to an original shape if the force or torque is removed.
  • Fig. IA is a perspective view of a regular icosahedron circumscribed by a cube.
  • Fig. IB is a perspective view of a regular dodecahedron circumscribed by a cube.
  • Fig. 1C is a perspective view of a regular icosahedron illustrating the mutually orthogonal planes that extending between three pairs of opposite edges.
  • Fig. ID is a perspective view of a cubooctahedron circumscribed by a cube.
  • Fig. 1 E is a perspective view of a portion of a polyhedral array in which the connections are arranged on the bias.
  • Fig. 2 is a side elevation view of a portion of the bias direction array shown in Fig. IE.
  • Figs. 3, 4, 5 and 6 are top, bottom, left and right side views, respectively, of an interior polyhedron in the bias direction array of Fig. IE, showing the positions of the connections to adjacent polyhedrons and their directions.
  • Fig. 7 is a perspective view of a portion of a radial direction array showing a single interior polyhedron connected to twelve surrounding polyhedrons by radial connections.
  • Fig. 8 is a perspective view of a portion of a radial direction array showing a single interior polyhedron connected to twelve surrounding polyhedrons by radial connections where the polyhedrons can transform in shape from an ideal shape when subjected to an influence.
  • Figs. 9, 10, 11, 12 and 13 are side views of an interior polyhedron of the array of Fig. 8.
  • Fig. 14A is an exploded perspective view of the interior polyhedron of Fig. 9 and its connections.
  • Fig. 14B is a side view of an icosahedron element capable of transformation.
  • Fig. 14C is a side view of an icosahedron element as transformed by a tension force, according to a first example.
  • Fig. 14D is a side view of an icosahedron element as transformed by a tension force, according to a second example.
  • Fig. 15 is a perspective view of a bias direction array of a specific implementation where the connections are mechanical elements and the polyhedrons are formed with corresponding connection receiving features.
  • Fig. 16 is a perspective view of one of the polyhedrons of Fig. 15.
  • Fig. 17 is a perspective view of one of the connections of Fig. 15.
  • Fig. 18 is a perspective view of a specific polyhedron construction, showing the polyhedron formed of two geodesic equatorial "saw tooth cut" with a hollow interior.
  • Fig. 19 A is a front view of another array, also referred to as a trigonal lattice.
  • Fig. 19B is a left side view of the trigonal lattice of Fig. 19 A.
  • Fig. 19C is a top plan view of the trigonal lattice of Fig. 19 A.
  • Fig. 19D is a side elevation view of a repeating element of the trigonal lattice configured with the mechanical elements of Fig. 15.
  • Fig. 2OA is a front view of another array, also referred to as a cubo- octahedral lattice.
  • Fig. 2OB is a left side view of the cubo-octahedral lattice of Fig. 2OA.
  • Fig. 2OC is a top plan view of the cubo-octahedral lattice of Fig. 2OA.
  • Fig. 21 is a perspective view of a slice of a polyhedral array absorbing a load and showing some of the polyhedrons moved from their equilibrium positions, with the connections between the polyhedrons omitted for clarity.
  • Fig. 22 is a perspective view of a slice of a polyhedral array showing one of the polyhedrons rotated from its equilibrium position in response to an applied torque.
  • Fig. 23 is a perspective view of a polyhedral array implemented as the core of a catalytic converter.
  • Fig. 24 is a perspective view of a polyhedral array implemented as an artificial reef in a marine setting.
  • Fig. 25 is a perspective view of a polyhedral array implemented as heat exchange element in a heat exchanger system.
  • Fig. 26 is a perspective view of a polyhedral array implemented as an artificial biological material.
  • Fig. 27 is a perspective view of a polyhedral array implemented as a multifunction road and/sidewalk surface.
  • Fig. 28 is a perspective view of polyhedral arrays implemented as storm water and erosion control structures.
  • Fig. 29 is a perspective view of polyhedral arrays implemented as various construction materials. Detailed Description
  • Each array is comprised of a plurality of discrete polyhedrons, and a connection network comprising individual connections that interconnect the polyhedrons.
  • the connection network serves to constrain each polyhedron with respect to its six degrees of freedom within three-dimensional space, such as is defined by a three- axis Cartesian coordinate reference frame.
  • Each polyhedron is discrete relative to adjacent polyhedrons in the array.
  • each polyhedron is separate from the other polyhedrons, and adjacent polyhedrons do not share common vertices, edges or faces.
  • the connections serve to interconnect the polyhedrons, and when the array is in equilibrium, i.e., at rest and not under an applied load, to maintain them in a spaced apart configuration.
  • a load such as a force or torque applied to the array
  • one or more of the polyhedrons may be moved in response to the influence.
  • at least one polyhedron, although constrained by its connections may move from its equilibrium position into contact with an adjacent polyhedron when the array is subjected to a load.
  • the polyhedron's movement may be a translation, a rotation, or a combination of a translation and a rotation.
  • the ability of a polyhedron to move within the array but remain connected to its neighboring polyhedrons allows the array to have "flexibility" under compression and resist the forces being applied.
  • the array is three-dimensional and may comprise multiple layers depending on the application and the characteristics desired for the application.
  • Each layer is generally planar, and the layers are generally parallel to each other.
  • the connections extend to adjacent polyhedrons in the same layer and in other layers.
  • the connections can be provided in many different configurations and materials to allow the array to have selected properties.
  • the connections between the polyhedrons extend along the bias (also described as "in bias directions”).
  • the connection or connections between a first polyhedron and its nearest neighbor are arranged to extend at acute angles relative to the respective plane or plane(s) of these polyhedrons.
  • the direction of the bias or "bias directions” are oriented at about 45 degrees with respect to the plane or planes. At equilibrium, these bias directions are mutually orthogonal, so any connections in the array that do not extend in parallel directions are also orthogonal with respect to each other.
  • bias direction arrays Examples of bias direction arrays, which are discussed below in greater detail, are shown in Fig. 2 and Fig. 15.
  • connections between the polyhedrons are described as radial connections.
  • radial connections for any given polyhedron extend from a face, edge or vertex of the polyhedron in a direction perpendicular to a vector originating its center. Over its length extending towards an adjacent polyhedron, the radial connection changes direction (or "bends"), as is described and illustrated below, such that its opposite ends are oriented in different planes that are mutually orthogonal to each other.
  • direction or "bends”
  • radial array allow it to deform such that two or adjacent polyhedrons enter into face to face contact when subjected to a load above a predetermined working load range. Examples of radial direction arrays, which are described below in greater detail, are shown in Figs. 7 and 8.
  • polyhedrons are described in terms of the number of faces, vertices and edges that each type of polyhedron has.
  • an icosahedron has twenty faces, twelve vertices and thirty edges.
  • each of the twenty faces is an equilateral triangle, so all of the angles are equal and the edges are of equal length.
  • an irregular polyhedron however, at least some of the angles and edges are unequal.
  • Certain regular polyhedrons and irregular polyhedrons can be used in arrays, as described below and depending upon the specific implementation. As described above, the array comprises discrete polyhedrons.
  • a suitable polyhedron is one that, if circumscribed by a cube, has an edge, a face or a vertex approximately coincident with each of the six cube faces.
  • suitable polyhedrons have at least three pair of connection locations, where each pair of connection locations is mutually orthogonal to the others, and each pair of connection features comprises two opposite faces, two opposite edges, two opposite vertices, or two opposite features of different types (e.g., one face and one opposite edge, or one edge and one opposite vertex).
  • a regular icosahedron 50 can be circumscribed by a cube 52 such that three pairs of the icosahedron's edges are coincident with the faces of the cube 52.
  • a first pair of opposite edges including a left edge 54 and an opposite right edge (obscured, but along line 56)
  • a second pair of opposite edges including a top edge 58 and an opposite bottom edge (obscured, but along line 60)
  • a third pair of opposite edges including a front edge 62 and an opposite back edge (obscured, but along line 64), each of which is coincident with a respective one of the six faces of the cube 52.
  • a regular dodecahedron 70 can be circumscribed by a cube 72.
  • three pairs of opposite edges of the dodecahedron (74 and 76, 78 and 80, and 82 and 84) are coincident with the faces of the cube 72.
  • a cubooctahedron 86 can be circumscribed by a cube 88.
  • the three pairs of opposite square faces of the cubooctahedron 86 (one of each pair being shown at 90, 92 and 94) are coplanar with the faces of the cube 88.
  • Fig. 1C is another illustration of a regular icosahedron, such as is shown in Fig. IA, except in Fig. 1C the icosahedron is depicted in a slightly different orientation for better perspective and with transparent faces. As shown in Fig. 1C, each pair of opposite edges of the icosahedron lies in the same plane, and the three planes defined by the three pair of opposite edges are mutually orthogonal to one another.
  • each polyhedron in the array can be described as having as many as six degrees of freedom, namely the ability to translate in the X, Y and/or Z directions as defined by a fixed coordinate axis (see Fig. 1C), and/or to rotate about one or more of these axes. These rotations are sometimes described as “pitch,” “yaw” and “roll.”
  • the connections serve to constrain some or all of each polyhedron's six degrees of freedom in at least a limited way.
  • the array can be configured such that the connections among the polyhedrons eliminate one or more degrees of freedom for at least one polyhedron (i.e., constrain the polyhedron to substantially no movement within that degree of freedom).
  • the connections among the polyhedrons eliminate one or more degrees of freedom for at least one polyhedron (i.e., constrain the polyhedron to substantially no movement within that degree of freedom).
  • the connections among the polyhedrons eliminate one or more degrees of freedom for at least one polyhedron (i.e., constrain the polyhedron to substantially no movement within that degree of freedom).
  • the connections among the polyhedrons eliminate one or more degrees of freedom for at least one polyhedron (i.e., constrain the polyhedron to substantially no movement within that degree of freedom).
  • the connections among the polyhedrons eliminate one or more degrees of freedom for at least one polyhedron (i.e., constrain the polyhedron to substantially no movement within that degree of freedom).
  • the connections among the polyhedrons eliminate one or more degrees of freedom for at least one polyhedron
  • Platonic polyhedrons other than the Platonic polyhedrons are also suitable, such as truncated versions of the cube, octahedron and icosahedron (also referred to as a "fullerene” or a “bucky ball"), cubo-octahedrons, dodecahedrons, icosidodecahedrons, rombicosidodecahedrons, snub dodecahedrons, etc. Stellated forms, deltahedrals, dual tetrahedrals and other similar variations of Platonic and Archimedian polyhedrons are also suitable.
  • the specific polyhedrons enumerated here are not to be construed as an exhaustive list, as other polyhedrons having the appropriate number and arrangement of connection features are also suitable
  • the icosahedron is a practical choice because it has three pairs of parallel faces.
  • the truncated icosahedron is derived by "slicing off' the twelve vertices of the icosahedron, thereby forming twelve regular pentagons.
  • the truncated icosahedron has twelve regular pentagonal faces, twenty regular hexagonal faces (for a total of 32 faces), 60 vertices and ninety edges.
  • the pentagons and hexagons provide a plurality of pairs of parallel surfaces.
  • Polyhedrons with fewer rectangular faces are generally more desirable because the triangular faces are more stable than rectangular faces.
  • the cube is an acceptable polyhedron with which an array can be formed, in practice, other polyhedrons offer greater advantages.
  • Other such mixed arrays are also possible.
  • polyhedrons of different sizes in the same array particularly if the differently sized polyhedrons are geometrically scaled relative to each other.
  • the polyhedrons in the array may be solid, or they may have solid faces that define a hollow interior. One or more faces of a polyhedron may have openings defined therein. It is also possible in some implementations to use polyhedrons having a "wireform" configuration with material defining only the edges and the faces being open. In some implementations, the polyhedrons include enhancements departing from ideal regular forms to facilitate connecting the polyhedrons to each other, such as is described in connection with one implementation shown in Figs. 15 and 16. Connections as used herein refers to any matter, including any arrangement of matter (such as a structure), or material that serves as part of the connection network in connecting the polyhedrons together and maintaining their spaced apart configuration in the array at equilibrium.
  • Connections can include mechanical elements, molecules or bonds, such as guest molecules, ligands, ligatures, etc. Each connection can be a separate element, or multiple connections can be formed together, depending upon the particular geometry, materials and requirements of the array. In arrays with one than one type of connection locations, e.g., vertices and faces, there may be connections extending between a vertex at one end and a face on the opposite end.
  • the polyhedral arrays can be designed to withstand loadings within a predetermined working range.
  • the polyhedral arrays can be designed to withstand forces and torques, including compression forces, tensile forces and torsional forces applied to the array, as well as other forces, such as shear forces, that may be developed internally within the array. Bending moments and axial compression forces can also comprise part of the loadings.
  • one or more of the polyhedrons in the array may be caused to move from its position at equilibrium.
  • Fig. 21 is a perspective view of a slice of a representative polyhedral array P withstanding a substantial force F applied to the array, and most directly, to the polyhedron G. In Fig.
  • connections are omitted for clarity and to emphasize that the polyhedron G has been moved by the force F. More specifically, the force F has urged the polyhedron G to translate (in a generally downward direction). Although the connections are not shown, they serve to assist in absorbing and spreading the force F to other polyhedrons and connections in the array. If the force F is within the expected working range, and if the array P is so designed, the array P (and specifically, the polyhedron G) will return to its original equilibrium state if the force F is removed.
  • Fig. 22 is a perspective view of a slice of an array Q showing a torque T applied to the array and, most directly, to the polyhedron H.
  • the connections between the H polyhedron H and its neighboring polyhedrons help in dissipating and resisting the torque T, thus allowing the array Q to withstand it.
  • the torque T is sufficient to move the polyhedron H, i.e., to rotate it approximately 60 degrees, but the array Q remains intact.
  • the examples of Figs. 21 and 22 are illustrative of ideal forces and ideal torques. In practice, nearly every loading of an array would include both forces and torques. Also, the examples describe loadings applied to boundaries of the array, such as a surface, edge or corner of the array. In practice, other loadings may also be experienced.
  • one embodiment includes connections oriented on the bias.
  • the bias directions are defined to mean directions intersecting the face of the array at an angle.
  • the bias directions can form angles of about 30 to about 60 degrees with the face of the array. Even better attributes are recognized with bias directions of about 40 to about 50 degrees.
  • the bias directions extend at about 45 degrees relative to the face of the array, but can be adjusted in orientation to the applied load.
  • the bias direction array is in direct contrast with an orthogonal array in which the connections extend at approximately 90 degrees or zero degrees relative to the face of the array. Compared to other orientations, connections extending along bias directions provide robust resistance to shear.
  • Fig. IE is a perspective view of a bias direction array 10.
  • the array 10 is comprised of multiple polyhedrons 12 arranged in a generally repeating pattern, with connecting elements 14, 16, 18 interconnecting the polyhedrons 12 and extending along bias directions. In the array 10, which is shown at equilibrium, the polyhedrons 12 are spaced apart and do not contact each other. In Fig. IE, the array 10 is shown as having three layers for convenience of illustration, with some parts of highly obscured layers omitted for clarity, but as described elsewhere, it could be extended in any direction indefinitely.
  • the polyhedrons 12 in the array 10 have the same general orientation. In the example of Fig. IE, the polyhedrons 12 are regular icosahedrons. As shown, the icosahedrons in the bias direction array 10 have a "face up" orientation, i.e., one of the triangular faces is oriented vertically upward.
  • the array 10 there is a lower layer 20 of polyhedrons generally occupying a first plane, an intermediate layer 22 above the lower layer 20 and generally occupying a second plane and an upper layer 24 above the intermediate layer 22 and generally occupying a third plane.
  • the right front face of the array is slanted, i.e., biased, from the protruding lower layer 20 in a rearward direction to the recessed upper layer 24.
  • Each of the polyhedrons 12 in the lower layer 20 and in the upper layer 24 is an edge polyhedron, i.e. a polyhedron occupying an edge position that defines an edge of the array 10.
  • the visible edge 12 are along the front right face (five in number) and along the front left face (two in number).
  • Each edge polyhedron has fewer connections to adjacent polyhedrons than an interior polyhedron.
  • each interior polyhedron has a connection to each of twelve surrounding polyhedrons, including the six surrounding polyhedrons in the same layer, three polyhedrons in the immediately adjacent upper layer and three polyhedrons in the immediately adjacent lower layer, as depicted in the illustrated orientation.
  • the connections 14, 16, 18 are shown in Figs. IE and 2 schematically as lines solely for purposes of clear illustration. Of course, each connection can take the form of any suitable connection as is described elsewhere in this application. Referring to Fig. 2, which is side view of a portion of the array 10 shown in Fig. IE, the connections visible for the edge polyhedrons are shown.
  • Each edge polyhedron has at least three connections to adjacent polyhedrons if it is part of two edges, five connections if it is part of one edge and six connections if it is part of a face.
  • connection 14 connect adjacent polyhedrons in the plane of the face that are within the same layer (as illustrated in the same horizontal row).
  • the connections 16 extend into the page at an angle and connect polyhedrons within one layer to polyhedrons in a layer above or a layer below.
  • the connections 18 also interconnect polyhedrons in different layers. The mutually orthogonal directions of the connections 14, 16, and 18 is most clearly seen on the coordinate axes shown at the right of Fig. 2.
  • Figs. 3, 4, 5 and 6 are side views of an interior polyhedron 12 of the array 10 showing the connections to the twelve surrounding polyhedrons in dashed lines.
  • Figs. 3 and 4 are top and bottom sides, six of the twelve connections can be seen from either of these sides. The remaining sides, called the "front” and “back” sides for convenience, each show four connections.
  • the polyhedrons 12 in the example of Fig. 1 are regular icosahedrons, but any other suitable polyhedron meeting the criteria described elsewhere in this application could substituted in place of a regular icosahedron, either at all locations or at fewer than all locations Radial Array
  • Fig. 7 is a perspective view of a portion of a radial array 110.
  • the radial connections 114 between polyhedrons 112 extend generally uniformly at right angles relative to the respective polyhedron's center.
  • the twelve edge polyhedrons occupy the same positions as the vertices of a cubo octahedron.
  • each connection 114 in the radial array connect different planes. Stated differently, each connection has a first end connected at a first plane on a first of the polyhedrons, and a second end connected at a second plane extending and translating orthogonally onto a second of the polyhedrons. In the specific implementation shown in Fig. 7, the connections 114 terminate at faces of the polyhedrons. Thus, each connection does not extend between closest faces of adjacent polyhedrons, but instead can be said to "bend" to connect a next-closest face.
  • the polyhedrons in the different layers as shown in Fig. 7 are oriented in face to face contact.
  • one or more aligned polyhedrons may be forced together and into face-to-face contact.
  • Polyhedrons in face-to-face contact provide a strong and stable configuration (similar to a column) for resisting compressive forces applied to the array.
  • the radial array is particularly resistant to torsional loads applied to the array, even a torque applied to a single peripheral polyhedron, as the loaded polyhedron's connections to adjacent polyhedrons help withstand and spread the torque.
  • Fig. 8 is a perspective view of another implementation of a radial array 210, shown from a different perspective than Fig. 7, in which the polyhedrons can transform in shape in response to an influence.
  • one or more of the polyhedrons 212 can transform in shape, i.e. morph or skew, from its equilibrium shape as shown in Fig. 14B without breaking.
  • Fig. 14C shows one of the polyhedrons 212 after it has been transformed from its equilibrium configuration by ja generally single-axis tension force C applied to two opposite faces of the icosahedron. The resulting transformed icosahedron 212' has been elongated in the directions of the force C.
  • Fig. 14C shows one of the polyhedrons 212 after it has been transformed from its equilibrium configuration by ja generally single-axis tension force C applied to two opposite faces of the icosahedron. The resulting transformed icosahedron 212' has been elongated in the directions of the force C.
  • the resulting transformed polyhedron 212" is the result of a tension force D acting on the polyhedron, which causes it to elongate in the directions of that force as well as in directions E perpendicular to the force D.
  • the same transformed polyhedron 212" results if the force is applied in the same plane as the force D, except rotated 90 degrees (i.e., if the force is applied along a direction normal to the page).
  • the polyhedrons 212 can be provided with predetermined features to facilitate the transformations in shape.
  • the polyhedrons 212 are icosahedrons formed of multiple pieces. Twelve of the faces of the icosahedron have a connection element, such as a protruding post or hub 222, for connecting the polyhedron to other polyhedrons. The remaining eight faces of the icosahedron are formed of three overlapping portions arranged to slide or "shutter" over each other, thus allowing the icosahedron to transform in shape.
  • the connections 214 have ends that are rotatably connected to respective faces of the polyhedrons to which they are connected, thus allowing the connections 214 to pivot relative to the polyhedrons.
  • connection 216 it can be seen that the ends 218, 220 are pivotably connected to respective hubs 222, 224, as one example.
  • Figs. 9, 10, 11, 12 and 13 are side views of an interior polyhedron 212 with the connections 214 and their general orientation shown (but in a reduced length for clarity of illustration).
  • Fig. 14A is an exploded view the polyhedron 212 shown with twelve connections 214, i.e., suitable for positioning it as an interior polyhedron of an array.
  • the polyhedron 212 is constructed of 12 interconnecting components 230 that together form a generally regular icosahedron with 20 faces with overlapping portions. As shown, each of the twelve components has one of the twelve hubs 222 of the icosahedron, several of which are visible in the drawing.
  • the assembled components 230 are movable relative to each other to allow the icosahedron to transform in shape. Attributes of Arrays
  • the polyhedral arrays described herein are "omni-extensible,” which is to say that an existing array can be extended in any direction by joining additional polyhedrons with additional connections. It is not necessary to first disassemble the existing array before extending it. In the same way that an existing array can be extended, it also possible to join two or more arrays into a single larger array.
  • the equilibrium locations of the polyhedrons in the array are unique and thus can be specified, e.g., using a Cartesian coordinates or other similar system.
  • the position of each polyhedron in the array can be described as being "addressable.”
  • at least some portion of the array is capable of carrying or holding electric charge, and the polyhedrons or connections in this portion of the array can be individually addressed to store data and/or to convey signals or transmit power.
  • the polyhedral arrays at equilibrium have spaces separating the polyhedrons. As also described, additional spaces at regularly repeating intervals can also be designed into the array.
  • the resulting array can be designed to provide a desired permeability suitable for a particular application.
  • an array configured as a building material to be installed in a generally horizontal orientation in an exposed environment can be configured for permeability to rain and storm water, yet still provide the structural strength to support the expected loads for the anticipated design life.
  • the configuration of the polyhedral arrays allows for them to interface with other structures, such as, e.g., conventional building materials.
  • the polyhedral arrays are shown as comprising polyhedrons of the same general size, which is a typical configuration. In some arrays, however, it is possible to mix polyhedrons of different types, or to substitute polyhedrons of different sizes. For example, an array can be formed where the majority of polyhedrons are regular icosahedrons having a unit size, and a larger icosahedron having a size that is a geometric multiple of the unit size is substituted into the array periodically.
  • a polyhedral array can be configured to be isotropic, i.e., to have the same properties in all directions. Alternatively, the array can have a predetermined anisotropy, e.g., to address a particular requirement of the specific implementation. Also, the polyhedrons and the connections can be isotropic or anisotropic.
  • the arrays can be configured to have different portions exhibiting different properties.
  • the polyhedrons occupying the edge positions in an array could be formed of a material more resistant to environmental conditions, or specifically adapted for receiving a thin covering layer or attaching to a conventional adjacent structure.
  • Polyhedrons having different physical properties, including elasticity, density, melting point, strength in compression, etc., to name a few, could be substituted in the array to achieve a desired result.
  • connections can be adapted in the same way. The properties of the connections can be varied according to their location in the array, their orientation relative to the expected load, etc. In addition, connections can be designed to exhibit different properties along their length.
  • the relative rigidities of the polyhedral elements and the connections elements can be tailored for a given application.
  • individual instances of the same type of element, e.g., the connections may be provided with varying rigidities to provide a desired anisotropy to the array.
  • connections extending in the "z" direction may be made less or more rigid than the interconnecting members in the "x" and "y” directions where the anticipated loading configuration differs in the "z” direction as compared to the "x" and “y” directions.
  • the polyhedral arrays deviate from perfect regularity yet still have the overall function and behavior of a regular array.
  • a polyhedron or a connection may be missing, or there may be a foreign object or impurity present in the array instead of one of the polyhedrons. Indeed, certain implementations warrant slight departures from perfect regularity to account for specific local conditions.
  • the polyhedrons and connections may be made of any material suitable for the particular application.
  • familiar materials such as metals, alloys, composites, plastics and others may be used.
  • very small scale arrays such as at the nanoscale or microscale.
  • Some molecular forms have specific polyhedral geometry.
  • the C 60 molecule is a truncated icosahedron
  • the B 12 molecule is an icosahedron. Work in the area of these and similar molecules is represented by U.S. Patent No. 6,531,107 entitled “Fabrication of Molecular Nanosystems," U.S. Patent No. 6,841,456 and U.S. Patent No. 6,965,026 entitled "Nanoscale Faceted
  • Polyhedra (these references are incorporated herein by reference). Assembly techniques, such as atomic force microscopy or self assembly, may be used to provide suitable molecules as polyhedral elements. Further, and not appreciated until now, the polyhedral molecules can be arranged into predetermined arrays, such as bias direction arrays or radial arrays, with connections designed as described above and formed of molecules, ligands or ligatures to give the resulting arrays overall properties useful in the design and fabrication of larger arrays (such as lattices) and objects.
  • arrays such as bias direction arrays or radial arrays
  • polyhedral arrays can be constructed using mechanical elements, such as icosahedral elements 250 and connector elements 252.
  • Fig. 15 is a perspective view of a portion or "chunk" of a bias direction array 254.
  • the icosahedral elements 250 and the connector elements 252 are arranged generally as shown for the bias direction array of Fig. 2, i.e., with the connector elements 252 extending on the bias relative to the planes defined by the layers of icosahedral elements 250.
  • each icosahedral element 250 has twelve connection locations 256 positioned about the outer periphery of the icosahedral element, eight of which are visible in Fig. 16.
  • the twelve connection locations 256 are arranged in six pairs, i.e., three sets of oppositely arranged pairs, and each of these three sets has an orientation mutually orthogonal to the other two sets.
  • each of the connection locations 256 is positioned within an opening in a projection 258 protruding slightly from the icosahedral element's outer surface and extending across one of its edges.
  • each connector element 252 has a first end 260, an opposite second end 262 and a body 264 between the ends 260, 262.
  • Each end 260, 262 is shaped to connect with one of the connection locations 256 by insertion of the end into one of the openings defined in the projections 258. Once inserted, the end 260 or 262 terminates near the edge of the icosahedral element 250 (which is covered by the projection 258).
  • each end 260, 262 can be tapered to provide a proper fit within the opening and orientation relative to the polyhedron. Also, each end 260, 262 can have retaining elements 268 extending alongside and positioned to project into edge apertures 266 provided in the icosahedral element 250 to assist in retaining the connector elements 252 in place.
  • the body 264 of the connector can have a spring-shaped construction as shown. Other geometries are, of course, also possible.
  • the spring-shaped body allows the connector to constrain the icosahedral elements 250 to which it is attached, yet can resiliently deform when those icosahedral elements are subjected to a force or a torque.
  • the icosahedral elements 250 are made of a plastic and have a hollow construction.
  • the connector elements 252 are also made of a plastic.
  • providing polyhedrons of a hollow construction can be achieved by providing polyhedron halves having specific geometries. Referring to a specific implementation for the icosahedron shown in Fig. 18, each icosahedral element half 270 can be formed such that when the halves are mated together, the junction follows a geodesic saw tooth-shaped equator 272.
  • Fig. 19A is a side elevation view of another implementation of an array 280, also referred to as a lattice.
  • the array 280 there is at least one layer in the array that includes open spaces of a predetermined size at and location at equilibrium. These open spaces are defined by regions that are large enough to accommodate at least one additional polyhedron, but are vacant.
  • Arrays with predetermined open spaces offer advantages, such as lighter weight per unit area or volume than corresponding filled arrays (including, e.g., the bias direction array of Fig. 1).
  • Figs. 19B and 19C are left side elevation and top plan views, respectively, of the array 280. For clarity of illustration, the connections between the individual polyhedrons have been omitted.
  • the repeating unit 282 is seven polyhedrons, including three connected polyhedrons 284 in the lower layer, three connected polyhedrons 286 in the upper layer, and a single polyhedron 288 in the intermediate layer connected to each of the polyhedrons 284, 286 in the lower and upper layers. From Fig. 19C, it can be seen that there are eight repeating units 282 shown.
  • the spacing between adjacent repeating units 282 has been exaggerated slightly for clarity.
  • the space between polyhedrons in the lower and upper layers that are adjacent to each other, but of different repeating units can be the same as the space separating adjacent polyhedrons within the same repeating unit.
  • the single polyhedron 288 in the intermediate layer is not connected to other intermediate layer polyhedrons. Thus, there is no connection between the intermediate layer polyhedron 288 and an adjacent intermediate layer polyhedron, such as the intermediate layer polyhedron 290.
  • predetermined recesses or spaces S are defined between the polyhedrons in that layer (and are bounded by the polyhedrons in the lower and upper layers). The spaces S generally occur according to a periodic pattern. The size and frequency of spaces within the array can be selectively determined according to properties desired for the specific application of the array. Fig.
  • FIG. 19D is a side elevation view of a repeating unit 282' for a trigonal lattice, which is similar to the repeating unit 282 in geometry, but in this specific implementation is formed of mechanical polyhedron elements 250 and connector elements 252.
  • Fig. 2OA is a front elevation view of an array 292 according to another implementation.
  • the array 292 there is a three-layer repeating unit 294 of twelve polyhedrons, including a central polyhedron surrounded by and connected to six polyhedrons in the intermediate layer, and connected to three polyhedrons in the lower level and three polyhedrons in the upper layer.
  • Figs. 2OB and 2OC are left side elevation and top plan views, respectively, of the array 292. For clarity of illustration, the connections between the individual polyhedrons have been omitted.
  • the array 292 as illustrated includes two layers of repeating units 294 with six repeating units per layer, for a total of twelve repeating units.
  • the repeating unit is a cubo-octahedron.
  • the array 292 can be described as a "cubo-octahedron" lattice.
  • each repeating unit 294 is connected to any adjacent repeating unit(s) in the same horizontal "row” or vertical "column.”
  • the interconnected repeating units 294 that comprise the array there are predefined spaces T that occur at each intersection of eight repeating units 294.
  • Fig. 23 shows a polyhedral array implemented as a core or substrate 402 of a catalytic converter 404 for a vehicle, e.g., an automobile.
  • the individual polyhedrons can be spaced apart as necessary to provide the proper air flow through the catalytic converter. Also, the properties of the polyhedron provide for substantial surface area per volume, which increases the area for chemical reactions to occur.
  • Fig. 24 shows a polyhedral array implemented as an artificial reef 406 in a marine setting. In the artificial reef 406, the polyhedrons have open faces and hollow interiors that permit the reef to sink and allow water and organisms to circulate through the structure. Also, the polyhedrons can be configured to enclose guest nutrients that become available to organisms in the water as through an active delivery system or a passive erosion of the artificial reef.
  • Fig. 25 shows a heat exchanger, such as an air conditioning unit, with the heat exchange elements 410 implemented as polyhedral arrays.
  • the heat exchange elements 410 can be sized as desired to provide the desired flow rates and mixing in the air flow passages and in the heat exchange passages, as well as to achieve other performance goals.
  • Fig. 26 shows a polyhedral array implemented as an artificial biological material, in this case an artificial human bicep muscle portion 412.
  • the muscle portion 412 can be configured in accordance with predetermined requirements, e.g., tensile strength, flexibility, elasticity, desired change in shape through the associated limb's range of motion, etc.
  • Fig. 27 shows a polyhedral array implemented as a multi-layer construction material 418.
  • the material 418 can be configured to have a road surface portion 420 capable of withstanding vehicle weights.
  • the road surface portion 420 can be porous to provide drainage, but if covered, an integrated drainage portion 422 can be included to drain away storm water, etc. from the road surface portion 420.
  • the material 418 can have a plant support portion 424.
  • the array of the plant support portion can be configured for integrated irrigation of plants.
  • the array can be configured for integrated charge and/or signal carrying capability to provide illumination (e.g., warning lights, street lights, traffic signal lights) and/or information (warnings, street names, etc.).
  • illumination e.g., warning lights, street lights, traffic signal lights
  • information warnings, street names, etc.
  • the array of the sidewalk portion 428 can be left exposed to provide a porous construction or it can serve as a base for receiving a solid outer layer.
  • Fig. 28 shows a polyhedral array implemented as storm water and erosion control structures, such as a multi-level culvert or canal wall 430 construction.
  • a polyhedral array implemented with earthen layers as part of a reinforced flood wall 432 adjacent one side of the canal wall 430.
  • another polyhedral array implemented as part of a vehicle and/or pedestrian path 434, together with other earthen layers.
  • Fig. 29 shows a house 435 under construction with polyhedral arrays implemented as exterior building panels 436, interior high-strength safe room panels 438, interior panels 440 and roofing material 442, to name just a few. All of the polyhedral arrays as implemented are configured for compatibility with conventional dimensional lumber framing and other conventional building materials. In addition to bias direction arrays and radial arrays, other array configurations are of course also possible, provided that the polyhedrons are discrete from each other at equilibrium and the connections interconnect the polyhedrons and constrain their movement to a desired degree in the resulting array.

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Abstract

L'invention concerne un réseau polyédrique, comprenant une pluralité de polyèdres discrets; et un réseau de connexion comprenant des connexions qui connectent les polyèdres. Les polyèdres discrets sont espacés les uns des autres en équilibre pour former un motif prédéterminé essentiellement régulier, et chaque polyèdre est constitué d'arêtes, de faces et de sommets. Le réseau de connexion limite au moins partiellement les polyèdres discrets par rapport aux six degrés de liberté de chaque polyèdre. Dans certains modes de réalisation, les connexions s'étendent le long de la diagonale du réseau. Dans d'autres modes de réalisation, les connexions s'étendent le long de directions radiales. Toutes les applications peuvent être réalisées sous la forme de réseaux réguliers ou de réseaux en treillis.
PCT/US2006/031940 2006-08-15 2006-08-15 Réseaux polyédriques tridimensionnels WO2008020843A1 (fr)

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