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WO2007056368A2 - Element structurel renforce et procede de formation - Google Patents

Element structurel renforce et procede de formation Download PDF

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Publication number
WO2007056368A2
WO2007056368A2 PCT/US2006/043349 US2006043349W WO2007056368A2 WO 2007056368 A2 WO2007056368 A2 WO 2007056368A2 US 2006043349 W US2006043349 W US 2006043349W WO 2007056368 A2 WO2007056368 A2 WO 2007056368A2
Authority
WO
WIPO (PCT)
Prior art keywords
carbon fiber
structural member
modulus
types
elasticity
Prior art date
Application number
PCT/US2006/043349
Other languages
English (en)
Other versions
WO2007056368A3 (fr
Inventor
Hamid Saadatmanesh
Original Assignee
Hj3 Composite Technologies, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hj3 Composite Technologies, Llc filed Critical Hj3 Composite Technologies, Llc
Publication of WO2007056368A2 publication Critical patent/WO2007056368A2/fr
Publication of WO2007056368A3 publication Critical patent/WO2007056368A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/14—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/10—Next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/04—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by a layer being specifically extensible by reason of its structure or arrangement, e.g. by reason of the chemical nature of the fibres or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/12—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by the relative arrangement of fibres or filaments of different layers, e.g. the fibres or filaments being parallel or perpendicular to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B32B2260/023—Two or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/14—Mixture of at least two fibres made of different materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00—Walls, panels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity

Definitions

  • the present invention relates to a reinforced structural member and to a method of reinforcing a structural member, in a manner designed to strengthen the structural member and to dissipate energy from forces due to pressure wave impacts (explosion), or inertia loading (earthquake) due to ground motion forces.
  • serial number 10/307,745 a reinforced structural member and a method of reinforcing the structural member are provided, that are believed to be effective to strengthen the structural member and to dissipate energy from forces due to pressure wave impacts (explosion), or inertia loading (earthquake) due to ground motion forces.
  • the present invention is designed to build on the concepts of application " serial number 10/307,745, and to provide additional new and useful features which are particularly useful in providing structure and method that can be retrofit to an existing structural member to enable the structural member to improve the energy dissipation capabilities of the structural member when subjected to pressure wave impacts (e.g. pressure waves due to an explosion) or to ground motion force transfer (e.g. due to inertia forces generated from ground motion, e.g. earthquake).
  • pressure wave impacts e.g. pressure waves due to an explosion
  • ground motion force transfer e.g. due to inertia forces generated from ground motion, e.g. earthquake.
  • the principles of the present invention are particularly useful in providing energy dissipation for a structural member formed e.g. of steel, concrete, brick, wood, masonry, and combinations of the foregoing.
  • a reinforced structural member comprises a structural member and a fabric or laminate cover on a selected portion of the structural member;
  • the fabric cover comprises a plurality of different carbon fiber types in a predetermined configuration (so that the fabric cover basically is formed essentially from carbon fibers),
  • each of the different carbon fiber types has a different modulus of elasticity than the other carbon fiber types, and each of the different carbon fiber types being of a type and in an orientation such that it will carry at least a part of an impact load due to pressure wave impact, inertia loading due to ground motion forces, and combinations of the foregoing, and
  • the predetermined configuration and the different modulus of elasticity of the different carbon fiber types designed to react to energy from forces due to pressure wave impacts, inertia loading due to ground motion forces, and combinations of the foregoing, in a manner such that higher modulus carbon fiber types will fracture before lower modulus carbon fiber types, so that in dissipating the energy of the impact load when the higher modulus carbon fibers break, the lower modulus carbon fiber types will remain intact to keep the reinforced structural member together.
  • the fabric or laminate cover preferably comprises at least two different types of carbon fibers, each of which has a different modulus of elasticity than the other carbon fiber types, and each carbon fiber type being in a pattern such that when subjected to energy from impact loads due to pressure wave impacts (e.g.
  • the carbon fiber type with the highest modulus of elasticity will fracture first (thereby dissipating a portion of the energy of the impact load), (ii) the carbon fiber type with the next highest modulus of elasticity will fracture next (thereby dissipating additional energy of the impact load),and (iii) resulting in the lower modulus carbon fiber types being in a state where they should be able to absorb the remaining energy of the impact load, and the likelihood of fracture of the carbon fiber type with the lowest modulus of elasticity is minimized. All three or more types of carbon fibers can be parallel or perpendicular to one another.
  • the fabric cover comprises (i) first type of carbon fibers having a minimum modulus of elasticity of 90 MSI, (ii) second type of carbon fibers with a minimum modulus of elasticity of 60 MSI, and (iii) third type of carbon fibers with a minimum modulus of elasticity of 30 MSI.
  • the fabric cover preferably includes a woven fabric formed from at least the first, second and third types of carbon fibers, and the woven fabric includes (i) a first orientation of carbon fibers in which carbon fibers of each of the first, second, and third types extend parallel to each other, and (ii) a second orientation of carbon fibers in which carbon fibers of each of the first, second and third types extend transverse to the first orientation of carbon fibers.
  • the fabric cover is preferably formed from plural layers of the woven fabric that are applied to both sides of the structural member.
  • the principles of the present invention are particularly useful in providing energy dissipation for a structural member formed e.g. of steel, concrete, brick, wood, masonry, and combinations of the foregoing.
  • Figure 1 is a schematic illustration of a structural member reinforced with a fabric cover, according to the principles of the present invention
  • Figure 2 is a schematic illustration of a preferred woven fabric pattern that is used to form a woven fabric for use as a fabric cover (and which can also be used in a laminate that forms the fabric cover), according to the principles of the present invention
  • FIG 3 is a schematic illustration of the manner in which a fabric cover can be formed on a structural member (also referred to as a substrate) with fabric layers that are different than the layers of Figure 2, but also according to the principles of the present invention.
  • the present invention relates to a reinforced structural member, and to a method of reinforcing a structural member, in a manner that dissipates energy from impact loads due to pressure wave impact (e.g. due to an explosion), or inertia loading (e.g. due to ground motion forces due to an earthquake).
  • pressure wave impact e.g. due to an explosion
  • inertia loading e.g. due to ground motion forces due to an earthquake.
  • a structural member 100 comprises a beam, column, slab or wall e.g. that can be formed of metal, concrete, wood, or other materials that are designed to be support structures.
  • the structural member 100 as opposite sides 100a, 100b, and a fabric cover 102, according to the principles of the present invention, is applied to each of the opposite sides of the structural member.
  • the fabric cover 102 can comprise a plurality of layers of woven carbon fiber fabric that are applied to the structural member, and can also comprise a laminate, or several laminates that are applied to the structural member (in this application, reference to a "laminate" means a preformed structure made of carbon fiber fabric layers that are bonded together, e.g.
  • the fabric cover 102 comprises a plurality of woven carbon fiber fabric layers 104, 106, 108, that are bonded to the opposite sides of the structural member (or to each other) by epoxy resin.
  • Each of the woven fabric layers 104, 106, 108 is preferably woven from at least two different carbon fiber types, each of which has a different modulus of elasticity than the other carbon fiber types.
  • each of the woven fabric layers is essentially formed from carbon fibers.
  • each of the different carbon fiber types is of a type and in an orientation such that it will carry at least a part of an impact load due to pressure wave impact, inertia loading due to ground motion forces, and combinations of the foregoing.
  • reference to carbon fiber types designed to carry at least part of an impact load means that the modulus of elasticity of the carbon fiber with the lowest modulus of elasticity is preferably at least equal to the modulus of elasticity of the structural member, or no more than 20% less than the modulus of elasticity of the structural member.
  • the woven fabric with carbon fibers of different modulus of elasticity is designed to enable the carbon fibers to react to energy from impact loads due to pressure wave impacts, inertia loading due to ground motion forces, and combinations of the foregoing, in a manner such that higher modulus carbon fiber types will fracture before lower modulus carbon fiber types, so that in dissipating the energy of the impact load when the higher modulus carbon fibers break, they dissipate portions of the impact loads, and the lower modulus carbon fiber types (which have modulus of elasticity at least equal to, or no more than 20% less than, the modulus of elasticity of the structural member).
  • the lower modulus carbon fibers will remain intact to keep the reinforced structural member together.
  • Each of the woven fabrics 104, 106, 108 is preferably formed of at least three different types of carbon fibers, including (i) first type of carbon fibers 110 having a minimum modulus of elasticity of 90 MSI, (ii) second type of carbon fibers 112 with a minimum modulus of elasticity of 60 MSI, and (iii) third type of carbon fibers 114 with a minimum modulus of elasticity of 30 MSI. More preferably, the first, second and third types of carbon fibers 110, 112, 114 each have a raw fiber tensile strength of at least 500 KSI, and each of the first second and third types of fibers forms about l/3d of the fiber used to form the fabric cover. Thus, there are about equal amounts of the different types of carbon fibers in the fabric cover.
  • the first, second and third types of carbon fibers 110, 112, 114 are in a pattern characterized by (i) a first orientation of fibers in which fibers of the first, second, and third types of carbon fibers extend parallel to each other, and (ii) a second orientation of fibers in which fibers of the first, second and third types of carbon fibers extend transverse to the first orientation of fibers.
  • reference to one carbon fiber being oriented "transverse" to another carbon fiber is intended to mean that the one carbon fiber is not oriented parallel to the other carbon fiber, but either crosses the other carbon fiber, or is oriented such that projections of the carbon fibers would cross each other.
  • the carbon fibers do not have to extend in horizontal and vertical rows, as illustrated, but rather can be in different patterns, such that their energy dissipation characteristics are tuned to the particularly type(s) of energy loading of the structural member that the fabric cover is intended to dissipate.
  • a fabric cover 102 is applied to each of the opposite sides of the structural member 100, and the fabric cover applied to each of the opposite sides preferably comprises a plurality of woven fabrics 104, 106, 108, each woven fabric having three different types of carbon fibers 110, 112, 114, in the woven pattern shown in Figure 3 and described above.
  • the fabric cover can be formed by one or more laminates of woven carbon fiber fabric segments, each laminate formed from the different types of carbon fibers.
  • the woven fabrics 104, 106, 108 are applied to the structural member by epoxy that Is characterized by the following mechanical properties: elongation at failure 5%; tensile strength 25,000 psi.
  • the woven fabric 104 adjacent the structural member is secured to the structural member by epoxy, and the other woven fabrics 106, 108 are secured to the woven fabric 104 or to each other by epoxy.
  • the fabric cover 102 preferably comprises at least two (and more preferably three) different types of carbon fibers, each of which has a different modulus of elasticity than the other carbon fiber types, and each carbon fiber type being in a pattern such that when subjected to energy from impact loads due to pressure wave impacts (e.g.
  • the carbon fiber type with the highest modulus of elasticity will fracture first (thereby dissipating a portion of the energy of the impact load), (ii) the carbon fiber type with the next highest modulus of elasticity will fracture next (thereby dissipating additional energy of the impact load),and (iii) resulting in the lower modulus carbon fiber types being in a state where they should be able to absorb the remaining energy of the impact load, and the likelihood of fracture of the carbon fiber type with the lowest modulus of elasticity is minimized. When the higher modulus carbon fibers break, they release the energy that was stored in them.
  • the woven carbon fiber fabric When the woven carbon fiber fabric is bonded to the structural member (e.g. a beam or wall), it acts as a structural element and shares the load that is imparted on the structural member. This means that the original structural member will have to resist less load. This load, in turn, is stored in the woven carbon fiber fabric as an energy which is then released upon fracture of the carbon fibers with higher modulus of elasticity.
  • the structural member e.g. a beam or wall
  • the epoxy that bonds the carbon fiber layers to the structural member or to the other carbon fiber layers serves to transmit impact load forces between the carbon fiber layers and the structural member so that the carbon fibers can dissipate the impact load in the manner described above.
  • the woven carbon fiber layers are of the three different types of carbon fiber that is shown and described in connection with Figure 2, the woven carbon fiber layers would preferably be bonded to the structural member and to each other by a epoxy.
  • the fabric cover 102 is formed of layers of the woven fabric 104, 106, 108, each with the three different types of carbon fibers, it is also contemplated that each of the layers of fabric could be of a single type of the carbon fibers.
  • Figure 3 schematically illustrates the manner in which such a fabric cover would be formed.
  • an epoxy is applied to the structural member (substrate).
  • An initial layer of fabric 120 formed solely from the lower modulus carbon fiber would be initially applied and bonded to each side of the structural member by epoxy.
  • a layer of fabric 122 formed from the next lowest modulus would be applied and bonded to the first layer by epoxy.
  • the highest modulus carbon fiber 124 would be applied and bonded to the second layer by epoxy.
  • the fabric cover according to the present invention is primarily characterized by its ability to effectively dissipate impact loads that are directed at the structural member. Additional benefits of a fabric cover of the present invention include:
  • a fabric cover formed exclusively from carbon fiber provides a non- corrosive material that will not degrade when exposed to moisture, chemicals between pH2-12.5, and environmental effects like UV.
  • a fabric cover formed exclusively from carbon fiber allows for greatest amount of strength per ply to decrease the weight and thickness of the system (i.e. the total amount of material applied to the structural member).
  • a fabric cover formed exclusively from carbon fiber and applied to the structural member by epoxy should be capable of catching fragmentations, shrapnel, and falling debris that often accompany an impact load
  • the system i.e. the all carbon fabric cover and epoxy
  • the system does not delaminate or crack away from the substrate
  • the woven carbon fabric can be formed by weaving or stitching the different types of carbon fibers in a desired pattern, using conventional weaving or stitching, or other known fabric forming techniques.
  • each individual carbon fiber layer can also be formed as a woven fabric formed by weaving or stitching the carbon fibers in a desired pattern, using conventional weaving or stitching, or other known fabric forming techniques.
  • each layer comprises a woven fabric formed of all of the different carbon fibers, or where each layer comprises a woven fabric formed of a different one of the different types of carbon fibers).
  • the particular pattern of the carbon fibers in the any woven carbon fiber fabric can also be predetermined in accordance with the particular energy dissipation characteristics that are desired to be incorporated into the woven carbon fabric.
  • the woven carbon fabric formed from three different types of carbon fibers e.g. as shown in Figure 2

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Structural Engineering (AREA)
  • Textile Engineering (AREA)
  • Woven Fabrics (AREA)
  • Reinforced Plastic Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne une structure et un procédé, destinés au renforcement d’un élément structurel, à la fois nouveaux et pratiques. Un revêtement en tissu est disposé sur une partie sélectionnée de l’élément structurel. Selon l’invention, (a) le revêtement en tissu comprend une pluralité de différents types de fibre de carbone se trouvant dans une configuration prédéterminée ; (b) chaque type de fibre de carbone possède un module d’élasticité différent, et le type et l’orientation de chaque type de fibre de carbone lui permettent de porter au moins partiellement une charge d’impact provenant de l’impact d’une onde de pression, une charge d’inertie provenant de forces de mouvement du sol, et diverses associations des éléments précédents ; et (c) la configuration prédéterminée et le module d’élasticité différent de chaque type différent de fibre de carbone sont conçus pour réagir à l’énergie découlant des forces produites par des impacts d’onde de pression, à une charge d’inertie provenant des forces de mouvement du sol, et aux associations des éléments précédents, de manière à ce que les types de fibre de carbone possédant un module plus élevé se brisent avant les types de fibre de carbone possédant un module plus faible, de sorte que lors de la dissipation de l’énergie provenant de la charge d’impact au moment de la rupture des fibres de carbone à module élevé, les fibres de carbone à module plus faible.
PCT/US2006/043349 2005-11-04 2006-11-06 Element structurel renforce et procede de formation WO2007056368A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/267,838 2005-11-04
US11/267,838 US20070104933A1 (en) 2005-11-04 2005-11-04 Reinforced structural member and method of forming

Publications (2)

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WO2007056368A2 true WO2007056368A2 (fr) 2007-05-18
WO2007056368A3 WO2007056368A3 (fr) 2007-10-25

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WO (1) WO2007056368A2 (fr)

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CN104775539B (zh) * 2015-04-20 2018-07-06 中南林业科技大学 碳纤维增强箍筋钢板套箍防屈曲耗能支撑
US11788175B2 (en) 2019-03-21 2023-10-17 Toyota Motor Engineering & Manufacturing North America, Inc. Chemically bonded amorphous interface between phases in carbon fiber and steel composite
JP7579064B2 (ja) * 2019-03-21 2024-11-07 トヨタ モーター エンジニアリング アンド マニュファクチャリング ノース アメリカ，インコーポレイティド 織物炭素繊維強化鋼マトリックス複合材料

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