FR2477064A3 - Composite panels - of fabric covered foam blocks between laminated sheets for structures to support flexural or compressive stresses - Google Patents

Composite panels - of fabric covered foam blocks between laminated sheets for structures to support flexural or compressive stresses Download PDF

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Publication number
FR2477064A3
FR2477064A3 FR8103850A FR8103850A FR2477064A3 FR 2477064 A3 FR2477064 A3 FR 2477064A3 FR 8103850 A FR8103850 A FR 8103850A FR 8103850 A FR8103850 A FR 8103850A FR 2477064 A3 FR2477064 A3 FR 2477064A3
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Prior art keywords
fabric
element according
laminated
fibers
panels
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Granted
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FR8103850A
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FR2477064B3 (en
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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
    • 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
    • B32B5/245—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 being a foam 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
    • 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
    • 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
    • B32B27/12—Layered products comprising a layer of synthetic resin 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
    • 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
    • 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
    • B32B5/18—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 features of a layer of foamed material
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/20—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of plastics
    • E04C2/22—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of plastics reinforced
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/32—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material
    • E04C2/328—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material slightly bowed or folded panels not otherwise provided for
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/40—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of a number of smaller components rigidly or movably connected together, e.g. interlocking, hingedly connected of particular shape, e.g. not rectangular of variable shape or size, e.g. flexible or telescopic panels
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • 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
    • B32B2262/101—Glass 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/022—Foam
    • 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/10—Fibres of continuous length
    • B32B2305/18—Fabrics, textiles
    • 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
    • B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
    • B32B2315/08—Glass
    • B32B2315/085—Glass fiber cloth or 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
    • B32B2375/00—Polyureas; Polyurethanes

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

Composite structural panels are assembled from blocks of cellular plastics material each having a cover of fabric anchored to the face of the foam and capable of supporting tensile stress. The blocks are enclosed between laminated panels bonded to the fabric covers. Suitable for curved or flat structures e.g. boat hulls, jetties, partitions, required to support flexural or compressive stresses. Pref. the fabric covers are of glass fibre, laid so that the warp threads are parallel to the long axis of the block and the weft threads parallel to one of the short axes of the block. Typically, the blocks are 12 cm long with a 6 x 6 cm or 3 x 3 cm section. Opt. the core is of polyurethane foam, open or, for hulls, pref. closed, so that the panels are impermeable to liquid penetrating a local puncture.

Description

L'invention concerne un élément généralement en forme de parallélépipède, en matière plastique expansée de faible masse volumique et à alvéoles fermés ou ouverts, revalu sur tous ses cotés ou sur une partie de ceux-ci d'un tissu résistant i la traction, par exemple en fibre de verre, de tissus naturels et similaires, ce tissu étant fortement relié à la surface à laquelle il s'applique de manière à participer à la traction qui se produit à la surface sous des efforts de flexion ou de compression, et faisant partie du matériau même de la surface. L'élément selon l'invention permet de constituer un élément structurel porteur pour la formation de panneaux stratifiés simples, de parois soumises à de fortes charges de flexion et de compression comme par exemple pour la formation d'une structure comprenant la coquille extérieure et la coquille intérieure de coques en résine renforcée de fibreS de verre pour embarcations ou obJets similaires, ponts d'embarcation, panneaux et parois de b timents,etc.  The invention relates to an element generally in the shape of a parallelepiped, of expanded plastic material of low density and with closed or open cells, revalued on all its sides or on a part of these of a fabric resistant to traction, by example in fiberglass, natural fabrics and the like, this fabric being strongly connected to the surface to which it is applied so as to participate in the traction which occurs on the surface under bending or compressive forces, and making part of the material itself on the surface. The element according to the invention makes it possible to constitute a load-bearing structural element for the formation of simple laminated panels, of walls subjected to high bending and compression loads such as for example for the formation of a structure comprising the outer shell and the inner shell of fiberglass reinforced resin hulls for boats or similar objects, boat decks, building panels and walls, etc.

On met en oeuvre les éléments porteurs selon l'invention de façon qu'ils occupent complètement ltespace entre deux feuilles stratifiées écartées et on les relie entre eux et aux feuilles au moyen de résine, par collage ou de façon slmilairesde manière à former un bloc compact sur lequel les fibres extr8mes sont formées par le tissu mentionné et par les feuilles stratifiées dont il est solidaire, de manière à coopérer à la résistance à la traction en tant que fibres les plus éloignées de l'axe neutre en cas de sollicitations à la flexion et à la résistance au gonflement dans le cas de sollicitations à la compression, sans possibilité de coulissement relatif des différentes surfaces en contact entre elles. The load-bearing elements according to the invention are used so that they completely occupy the space between two separated laminated sheets and they are connected together and to the sheets by means of resin, by gluing or in the form of sliders so as to form a compact block. on which the end fibers are formed by the fabric mentioned and by the laminated sheets of which it is integral, so as to cooperate in the tensile strength as fibers furthest from the neutral axis in the event of bending stresses and to the swelling resistance in the case of compressive stresses, without the possibility of relative sliding of the different surfaces in contact with each other.

De préférence, on dépose, on constitue ou on applique solidairement le premier stratifié sur une surface d'un ensemble d'éléments adjacents déjà préparés selon la forme finale et ensuite, après avoir assemblé les éléments entre eux ainsi qu'au premier stratifié, au moyen de colle ou de résine, on dépose, on constitue ou on applique le deuxième stratifié qui fait ensuite corps avec les surfaces de l'élément, opposées à celles qui sont solidaires du premier stratifié. Preferably, the first laminate is deposited, constituted or applied together on a surface of a set of adjacent elements already prepared according to the final shape and then, after having assembled the elements together as well as to the first laminate, to the by means of glue or resin, the second laminate is deposited, formed or applied, which then forms one body with the surfaces of the element, opposite to those which are integral with the first laminate.

I1 résulte de ce qui précède et dans tous les cas une structure compacte, dont tous les constituants sont solidaires entre eux, ce qui augmente notablement la ré sistance mécanique de l'ensezble aux sollicitations à la flexion et à la compression qui existent principalement dans les parois, panneaux, coques et ponts d'embarcation, du fait de la structure homogène et porteuse qui devient ainsi capable de supporter des charges notablement supé- rieures à celles qui résulteraient de la somme des différents éléments, avec un poids notablement moindre à égalité de résultats. I1 results from the above and in all cases a compact structure, of which all the constituents are integral with each other, which notably increases the mechanical resistance of the assembly to the flexural and compressive stresses which exist mainly in the walls, panels, hulls and decks of the boat, due to the homogeneous and load-bearing structure which thus becomes capable of supporting loads appreciably greater than those which would result from the sum of the different elements, with a significantly less weight equal to results.

D'autres avantages de l'utilisation de l'élément selon l'invention, outre une plus grande rigidité des parois et particulièrement dans le cas d'applications aux coques d'embarcation ou objets similaires, résident aussi dans le fait que, puisque la matière plastique expansée formant la structure est à alvéoles séparés, elle est étanche à l'eau même si elle est percée de sorte qu'il est possible de pratiquer des trous dans les pareis de la coque, par exemple pour disposer l'installation de bord, sans devoir recourir à des moyens d'étanchéité particuliers, de même qu'il est possible d'éliminer les nervures intérieures ou extérieures, nécessaires dans les constructions normales pour maintenir l'espacement des coquilles et pour augmenter leur moment d'inertie. Other advantages of the use of the element according to the invention, in addition to greater rigidity of the walls and particularly in the case of applications to boat hulls or similar objects, also reside in the fact that, since the expanded plastic material forming the structure is with separate cells, it is waterproof even if it is drilled so that it is possible to make holes in the sides of the hull, for example to arrange the on-board installation , without having to resort to particular sealing means, just as it is possible to eliminate the internal or external ribs, necessary in normal constructions to maintain the spacing of the shells and to increase their moment of inertia.

Diverses autres caractéristiques de l'invention r-s- sortent d'ailleurs de la description détaillée qui suit. Various other characteristics of the invention also emerge from the detailed description which follows.

Des formes de réalisation de l'objet de l'invention sont représentées, à titre d'exemples non limitatifs, au dessin annexé. Embodiments of the object of the invention are shown, by way of nonlimiting examples, in the accompanying drawing.

La fig. 1 montre en perspective un élément structurel conforme à l'invention
La fig. 2 représente en perspective un panneau stratifié en deux feuilles avec interposition des éléments structurels rendus solidaires de celles-ci, les feuilles étant vues par transparence.Fig. 1 shows in perspective a structural element according to the invention
Fig. 2 is a perspective view of a panel laminated into two sheets with the interposition of structural elements made integral with the latter, the sheets being seen by transparency.

La fig. 3 montre à titre d'exemple, en coupe verticale, un tronçon de coque pour embarcation obtenu au moyen des éléments selon l'invention. Fig. 3 shows by way of example, in vertical section, a section of hull for a boat obtained by means of the elements according to the invention.

Comme le montre la fig. 1, l'élément structurel selon l'invention indiqué en général par la référence 1 se compose d'un bloc 2 de matière plastique expansée, telle que du polyuréthanne expansé à alvéoles fermés ou ouverts, en forme de parallélépipède de section carrée ou rectangulaire dont la dimension axiale est de préférence un multiple du côté du carré de section ou du grand côté du rectangle de section, cette dimension axiale restant égale pour tous les éléments, tandis que les dimensions de l'un des côtés ou des deux optés de la section peuvent varier de façon que l'on puisse former des blocs d'épais- seurs diverses. As shown in fig. 1, the structural element according to the invention indicated in general by the reference 1 consists of a block 2 of expanded plastic, such as expanded polyurethane with closed or open cells, in the shape of a parallelepiped of square or rectangular section, the axial dimension is preferably a multiple of the side of the square of section or the long side of the rectangle of section, this axial dimension remaining equal for all the elements, while the dimensions of one of the sides or both opted for the section may vary so that blocks of various thicknesses can be formed.

Le bloc 2 de matière plastique expansée est envo loppé, selon l'invention, d'un tissu résistant 3, de tous côtés et de façon continue, l'enroulement se fermant sur une azote indiquée, à titre d'exemple par 4* de façon que les fils de chaîne 3 du tissu soient disposés parallble- ment à l'axe longitudinal du bloc ou parallèlement à une arête longue, tandis que les fils de tram. 6 sont disposés transversalement et entourent le bloc suivant des sections parallèles. The block 2 of expanded plastic is covered, according to the invention, with a resistant fabric 3, on all sides and continuously, the winding closing on a nitrogen indicated, for example by 4 * of so that the warp threads 3 of the fabric are arranged parallel to the longitudinal axis of the block or parallel to a long edge, while the tram threads. 6 are arranged transversely and surround the block in parallel sections.

Le tissu d'enveloppement 3 est relié fermement à la matière qui forme le bloc, par englobement ou incorporation par exemple pendant l'expansion, ou encore par colle ge, par fusion, au moyen de résine,etc., selon le type do tissu utilisé pour l'enveloppement. Le tissu 3 peut autre réalisé en n'importe quel type résistant à la traction, de préférence en fibres de verre, en fibres artificielles ou synthétiques ou encore en fibres naturelles résistantes. The wrapping fabric 3 is firmly connected to the material which forms the block, by embedding or incorporating for example during expansion, or by glue, by fusion, by means of resin, etc., according to the type of fabric. used for wrapping. The fabric 3 can also be produced in any type of tensile strength, preferably in glass fibers, in artificial or synthetic fibers or in resistant natural fibers.

La fig. 2 illustre un exemple d'application de plusieurs éléments 1 entre deux panneaux stratifiés 7, 8, par exemple en résine renforcée de fibres de verre ou en matière similaire. Fig. 2 illustrates an example of application of several elements 1 between two laminated panels 7, 8, for example in resin reinforced with glass fibers or in a similar material.

Les éléments 1 sont disposés avec des jonctions décalées de manière à assurer la continuité dans les deux sens et sont collés à la fois entre eux et aux ur- faces intérieures des panneaux 7, 8 au moyen de résine, de colle, par fusion partielle ou par des moyens similaires, de manière à faire corps avec ces surfaces. The elements 1 are arranged with staggered junctions so as to ensure continuity in both directions and are bonded both to each other and to the interior surfaces of the panels 7, 8 by means of resin, glue, by partial fusion or by similar means, so as to become one with these surfaces.

Etant donné les dimensions des cotés de la section, qui ont seulement quelques centimètres, par exemple 6 x 6 cm ou 3 x 6 cm, avec une longueur de 12 cm, il est possible de suivre des courbures comme par exemple celles des flancs de la coque d'embarcation, an qu'il y ait, entre un élément et un autre, un interstice sensible ne pouvant pas être rempli par la matière de collage interposée entre les éléments. Given the dimensions of the sides of the section, which are only a few centimeters long, for example 6 x 6 cm or 3 x 6 cm, with a length of 12 cm, it is possible to follow curvatures such as those of the sides of the boat hull, so that there is, between one element and another, a sensitive gap that cannot be filled with the bonding material interposed between the elements.

La fig. 3 indique un exemple d'application de 1'élément selon l'intention entre des éléments courbes tels que deux coquilles, intérieure et respectivement extErieu- re, d'une coque pour embarcation, les différentes parties étant représentées espacées pour faciliter la compréhension alors qu'en pratique elles sont très rapprochées et sont jointes les unes aux autres. Co xe on le voit à la fig. 3, les deux coquilles 9, 10 de la coque, représentées en coupe verticale, sont parallèles mais courbes et les éléments 1 sont placés å l'intérieur, leur axe lon6itudinal étant perpendiculaire au plan de la courbure. Fig. 3 indicates an example of application of the element according to the intention between curved elements such as two shells, interior and respectively exterior, of a hull for boat, the various parts being shown spaced apart to facilitate understanding while 'in practice they are very close together and are joined to each other. Co xe we see in fig. 3, the two shells 9, 10 of the shell, shown in vertical section, are parallel but curved and the elements 1 are placed inside, their longitudinal axis being perpendicular to the plane of the curvature.

Les interstices 11 et 12 entre les surfaces latérales des éléments 1 et les surfaces intérieures des coquilles 9, 10, ainsi que les interstices 13 entre les éléments 1 adJacents( sont remplis d'un adhésif approprié de manière à créer une structure porteuse unique, particulièrement capable de résister aux sollicitations de flexion et do compression comme celles qui se produisent particulièrement dans les coques et les ponts d'embarcations ou objets similaires. The interstices 11 and 12 between the lateral surfaces of the elements 1 and the interior surfaces of the shells 9, 10, as well as the interstices 13 between the adjoining elements 1 (are filled with an appropriate adhesive so as to create a unique supporting structure, particularly able to withstand flexing and compression stresses such as those which occur particularly in the hulls and decks of boats or similar objects.

En effet, si l'on suppose une charge uniformément distribuée à l'extérieur, indiquée par la flèche E, et une charge concentrée à l'intérieur indiquée par la flèche
I, les fibres extérieures constituées par le tissu 3 enveloppant les éléments 1 et par la coquille extérieure 9 sont sollicitées soit à la traction relativement à l'axe neutre A en vertu de la charge I, soit à la compression en vertu de la charge extérieure E, tandis que les fibres intérieures, constituées par le tissu 3 et la coquille 10, sont sollicitées à la compression, également localisée, qui fait intervenir le tissu existant sur les côtés adjacents des éléments 1 de manière à empêcher qu'il n'en résulte un gonflement des blocs intérieurs 2.Indeed, if we suppose a load uniformly distributed outside, indicated by arrow E, and a concentrated load inside indicated by arrow
I, the external fibers constituted by the fabric 3 enveloping the elements 1 and by the external shell 9 are stressed either under traction relative to the neutral axis A by virtue of the load I, or under compression by virtue of the external load E, while the interior fibers, constituted by the fabric 3 and the shell 10, are subjected to compression, also localized, which involves the fabric existing on the adjacent sides of the elements 1 so as to prevent it from results in swelling of the interior blocks 2.

Pour obtenir les structures composites comprenant de multiples éléments structurels représentés à titre d'exemple aux fig. 2 et 3, on peut de préférence préparer la série d'éléments structurels 1 dans la disposition voulue Ot1ensuite, déposer ou construire par stratification ou par des moyens similaires l'une des parois stra tifiées, par exemple la paroi 7 de la fig. 2 ou la paroi 9 de la fig. 3, sur un 8tó des éléments structurels 1 et ensuite, après avoir assemblé les deux parties au moyen de résine, de colle ou de façon similaire, poursuivre la constitution, le dépôt ou la stratification de la paroi 8 de la fig. 2 ou la paroi 10 de la fig. 3 de manière à former une structure compacte unique dont les diverses parties sont solidaires entre elles et dont les fibres supportent les sollicitations les plus fortes déterminées par la charge appliqué.  To obtain composite structures comprising multiple structural elements shown by way of example in FIGS. 2 and 3, it is preferably possible to prepare the series of structural elements 1 in the desired arrangement Ot1ensuite, deposit or build by stratification or by similar means one of the laminated walls, for example the wall 7 of FIG. 2 or the wall 9 of FIG. 3, on an 8tó of the structural elements 1 and then, after having assembled the two parts by means of resin, glue or similar, continue the constitution, the deposition or the stratification of the wall 8 of FIG. 2 or the wall 10 of FIG. 3 so as to form a single compact structure, the various parts of which are integral with each other and the fibers of which support the highest stresses determined by the load applied.

La structure obtenue selon l'invention présente une plus grande résistance et une plus grande rigidité et en particulier, pour les structures de coques ou similaires, on ohserve une diminution de poids à égalité des autres conditions ainsi qu'une étanchéité absolue à l'eau, meme en cas de brèches, de perforations, de ruptures ou de dommages similaires à des partis do parois. The structure obtained according to the invention has greater strength and greater rigidity and in particular, for hull structures or the like, a reduction in weight is equal to the other conditions as well as an absolute watertightness , even in the event of breaches, punctures, ruptures or similar damage to parts of the walls.

I1 est évident que l'on peut faire varier, selon les besoins et sans pour cela sortir du cadre de l'invention, les dimensions, la forme des blocs ainsi que le type de tissu qui les enveloppe. It is obvious that one can vary, as required and without departing from the scope of the invention, the dimensions, the shape of the blocks as well as the type of fabric which envelops them.

L'invention n'est pas limitée aux exemples de réalisation, représentés et décrits en détail, car diverses modifications peuvent y astre apportées sans sortir de son cadre. The invention is not limited to the exemplary embodiments, shown and described in detail, since various modifications can be made thereto without departing from its scope.

Claims (6)

REVENDICATIONS 1 - Elémont structurel porteur en matière plastique expansée convenant particulièrement à la construction do parois, panneaux, coques, ponts d'embarcation, etc., caractérisé en ce qu'il comprend un bloc sensiblement parallélépipêdique revêtu sur toutes ses surfaces ou sur une partie de celles-ci d'un tissu résistant à la traction, ce tissu étant relié solidairement à la ratière des surfaces de manière à ne pas permettre de coulissements relatifs entre le tissu et la surface de contact et l'lé- ment étant accouplé à des feuilles stratifiées ou à d'autres éléments rendus solidaires des surfaces. 1 - Structural support element in expanded plastic material particularly suitable for the construction of walls, panels, hulls, boat decks, etc., characterized in that it comprises a substantially parallelepipedal block coated on all of its surfaces or on part of these of a tensile-resistant fabric, this fabric being integrally connected to the dobby of the surfaces so as not to allow relative sliding between the fabric and the contact surface and the element being coupled to sheets laminates or other elements secured to surfaces. 2 - élément selon la revendication 1, caractérisé en ce que le tissu de revêtement est constitué de pr8fé- rence de fibres de verre, de fibres synthétiques ou artificielles ou de fibres naturelles de grande résistance à la traction. 2 - element according to claim 1, characterized in that the covering fabric consists preferably of glass fibers, synthetic or artificial fibers or natural fibers of high tensile strength. 3 - Elément selon l'une des revendications 1 et 2, caractérisé en ce que le tissu est disposé de telle sorte que les fils de channe sont parallèles à l'axe longitudinal de l'élément et que les fils de trame sont dirigés transversalement, les fils de trame étant continus du fait que l'enroulement est effectué jusque ce que les deux pans du tissu se rejoignent. 3 - Element according to one of claims 1 and 2, characterized in that the fabric is arranged so that the warp threads are parallel to the longitudinal axis of the element and that the weft threads are directed transversely, the weft threads being continuous because the winding is carried out until the two sides of the fabric meet. 4 - élément selon l'une des revendications 1 à 3, caractérisé en ce que les dimensions axiales de l'élément sont de préférence multiples des dimensions d1au moins un des côtés de la section. 4 - element according to one of claims 1 to 3, characterized in that the axial dimensions of the element are preferably multiple of the dimensions d1 at least one of the sides of the section. 5 - élément selon l'une des revendications 1 à 4, caractérisé en ce que la disposition des surfaces stratifiées ou similaires de part et d'autre de l'élément s'effectue par assemblage de surfaces du tissu aux surfaces stratifiées et entre les surfaces adjacentes des déments, au moyen de colle, de résine ou par des moyens similaires, de manière à créer une structure monobloc porteuse capable de résister aux sollicitations de flexion et/ou de compression.  5 - element according to one of claims 1 to 4, characterized in that the arrangement of the laminated or similar surfaces on either side of the element is effected by assembling surfaces of the fabric with the laminated surfaces and between the surfaces adjacent to the dementia, by means of glue, resin or similar means, so as to create a one-piece load-bearing structure capable of withstanding the bending and / or compression stresses. 6 - Elément selon la revendication 1, caractérisé en ce qu'il est associé à des éléments déposés, constitués, stratifiés, etc. directenent sur ses surfaces ou assemblés au doyen de résine ou de colle de manière å constituer une structure dans laquelle les fibres les plus extérieures absorbent les sollicitations de traction et/ou de coipres- sion dues aux charges appliquées à la structure.  6 - Element according to claim 1, characterized in that it is associated with deposited elements, formed, laminated, etc. directly on its surfaces or assembled with the resin or glue dean so as to constitute a structure in which the outermost fibers absorb the tensile and / or co-compressive stresses due to the loads applied to the structure.
FR8103850A 1980-02-29 1981-02-26 Composite panels - of fabric covered foam blocks between laminated sheets for structures to support flexural or compressive stresses Granted FR2477064A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8020925U IT8020925V0 (en) 1980-02-29 1980-02-29 STRUCTURAL SUPPORTING ELEMENT IN EXPANDED PLASTIC MATERIAL COVERED WITH COVERING, FOR WALLS, PANELS, HULLS AND SIMILAR.

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FR2477064A3 true FR2477064A3 (en) 1981-09-04
FR2477064B3 FR2477064B3 (en) 1982-01-08

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FR8103850A Granted FR2477064A3 (en) 1980-02-29 1981-02-26 Composite panels - of fabric covered foam blocks between laminated sheets for structures to support flexural or compressive stresses

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0245816A2 (en) * 1986-05-12 1987-11-19 Kawasaki Jukogyo Kabushiki Kaisha Fiber reinforced structural member
FR2719803A1 (en) * 1994-05-13 1995-11-17 France Etat Armement Large sized flat composite material sandwich panels
GB2387809A (en) * 2002-04-23 2003-10-29 Duncan Res And Dev Ltd Multi-beam panel structures
FR3136800A1 (en) * 2022-06-20 2023-12-22 Joël Queirel Method for producing a wall and wall comprising a plurality of construction elements

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0245816A2 (en) * 1986-05-12 1987-11-19 Kawasaki Jukogyo Kabushiki Kaisha Fiber reinforced structural member
EP0245816A3 (en) * 1986-05-12 1989-05-10 Kawasaki Jukogyo Kabushiki Kaisha Fiber reinforced structural member
FR2719803A1 (en) * 1994-05-13 1995-11-17 France Etat Armement Large sized flat composite material sandwich panels
GB2387809A (en) * 2002-04-23 2003-10-29 Duncan Res And Dev Ltd Multi-beam panel structures
FR3136800A1 (en) * 2022-06-20 2023-12-22 Joël Queirel Method for producing a wall and wall comprising a plurality of construction elements
WO2023247877A1 (en) * 2022-06-20 2023-12-28 Queirel Joel Method for producing a wall, wall comprising a plurality of construction elements and mould for producing a construction element

Also Published As

Publication number Publication date
FR2477064B3 (en) 1982-01-08
IT8020925V0 (en) 1980-02-29

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