EP2028309B1 - Verstärkungseinlage oder -band in einem pseudoelastischen Material zur Schwingungsdämpfung - Google Patents

Verstärkungseinlage oder -band in einem pseudoelastischen Material zur Schwingungsdämpfung Download PDF

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Publication number
EP2028309B1
EP2028309B1 EP08014752A EP08014752A EP2028309B1 EP 2028309 B1 EP2028309 B1 EP 2028309B1 EP 08014752 A EP08014752 A EP 08014752A EP 08014752 A EP08014752 A EP 08014752A EP 2028309 B1 EP2028309 B1 EP 2028309B1
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European Patent Office
Prior art keywords
band
strips
fabric
volutes
volute
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Not-in-force
Application number
EP08014752A
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English (en)
French (fr)
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EP2028309A1 (de
Inventor
Ettore Rossini
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D04H3/05—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in another pattern, e.g. zig-zag, sinusoidal
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics

Definitions

  • the present invention relates to a stiffening fabric or band in pseudoelastic material to damp vibration in elements subject to it, or rather a fabric or band that contains pseudoelastic material which, thanks to its particular positioning and application in an element of an object subjected to vibration allows the said vibration to be damped internally, thereby making the object more advantageously usable in the specific application or use required.
  • the prior art already includes more or less rigid materials that oppose internal vibration within the thickness of the material itself and respond to the laws of elasticity and known coefficients, such as the specific elastic module of each, even if composite, material.
  • shape memory materials known by the acronym SMA, or which may also have "superelasticity” or “pseudoelasticity”, that is, metal alloys in which the components cause structural martensitic-austenitic transformation at temperatures near to room temperature, making use of its trigger transformation characteristic both in the change from martensite to austensite, on heating, and in the opposite change from austenite to martensite, on cooling.
  • NiTiNOL NiTiNOL which has enabled the manufacture of the so-called shape memory materials used in a wide range of technological applications, including surgical prosthetics devices, as well as devices where stress induces controlled strain of the object to the maximum value permitted for that object, so as to make use of the elastic, or rather pseudoelastic, return, which recovers the shape of the object itself to avoid excessive strain and prevent it from breaking.
  • a sports implement comprises at least one composite layer with shape memory alloy forming a reinforcing insert at flex point for dumping the sports implement to obtain that only a reduced amount of energy is transmitted to a user.
  • the shape memory alloy insert comprises aligned individual lengths of shape memory alloy filaments, including a hollow and a solid shape also.
  • the shape memory comprises a woven wire mesh screen of shape memory alloy filaments also.
  • a torsionally-dumped ski having a low friction ski base and a non-rusting ski edge that have an elongated snow-contacting base surface made of Nitinol sheet having two opposed longitudinal edges on opposite side of an elongated medial portion.
  • the edge structures form an integral part of the Nitinol base sheet by welding the sheet along opposite edges thereof to the edge structure. It also describes a torsional vibration structure built into the ski, including Nitinol structure extending along one or more axes lying oblique to the longitudinal axis of the ski.
  • Another aim of the invention is to create a device for the element in pseudoelastic alloy of the fabric or band which enables the intensity and direction of the vibration damping intervention to be controlled, by using limited quantities of pseudoelastic material.
  • a last but not least aim of the present invention is to control the vibration damping intervention frequency, whether or not linked to the required vibration damping intensity value.
  • the invention solves the above-mentioned technical problem, by using a stiffening fabric or band in pseudoelastic material to damp vibration in elements subject to it, comprising a layer of material of thread(s) of shape memory alloy, with thread(s) arranged in the plane of the layer; characterised by the fact that the thread(s) in shape memory alloy are arranged in strips of volutes, orientated with the pitches of the volutes in the direction of the warp and the amplitude of the volute in the direction of the weft.
  • An advantageous embodiment has at least one layer of stiffening fabric or band support material; also the volute strips placed in the plane may be produced with different threads and each volute may be separate.
  • the fabric or band advantageously has the volute strips with the volute pitch or wavelength of between 2 and 20mm.
  • the volute strips have a volute amplitude (F) of between 3 and 20mm.
  • the thread(s) in shape memory alloy, of the said fabric or band, composing the volutes have a diameter of between 0.050 and 0.250mm.
  • the invention comprises a composite band, with a layer of stiffening material to provide resistance to the vibration of the application element, which has a thread or threads in shape memory alloy, placed in the plane(s) of the layer; characterised by the fact that the thread(s) in shape memory alloy are arranged in strips of volutes, orientated uniformly with each other in the plane(s) of the layer.
  • the composite band has a thread or threads in shape memory alloy, arranged in the plane(s) of the layer by means of a band or fabric.
  • the invention advantageously comprises a composite structural element, with a layer of stiffening material to provide resistance to the vibration in the machine device that it is to be used in, where there is a thread or threads in shape memory alloy, placed in the plane(s) of the layer; characterised by the fact that it has thread(s) in shape memory alloy arranged in strips of volutes, orientated uniformly with each other in the plane(s) of the layer.
  • the composite structural element has the thread or threads in shape memory alloy, placed in the plane(s) of the layer by means of a fabric or band.
  • Figure 1 is a limited schematic representation of a fabric or band, in accordance with the invention, where the material with pseudoelastic properties and the method of fixing it to the other components of the band are highlighted;
  • Figure 2 is a schematic plan view of a thread volute in pseudoelastic material;
  • Figure 3 is a perspective schematic view of a band in pseudoelastic material in accordance with the invention;
  • Figure 4 is a schematic view of a first arrangement of volute strips placed in a plane of the fabric or band in accordance with the invention;
  • Figure 5 is a schematic view of a second arrangement of volute strips staggered by a quarter of a volute and slightly overlapping in a plane of the fabric or band in accordance with the invention;
  • Figure 6 is a schematic view of a third arrangement of volute strips staggered by half a volute, aligned and slightly overlapping in a plane of the fabric or band in accordance with the invention;
  • Figure 7 is a schematic view of
  • Figure 1 shows a band 1, in accordance with the invention, on which three strips 2 of volutes 3 with a thread in pseudoelastic material are arranged; each strip is attached in the formation position of the volutes 3 with a simple chain stitch 4, to keep the volutes 3 in position during the production of the band 1.
  • the warp O indicates the production direction of the band/fabric, while the direction T of the weft indicates the direction of the stress in the band/fabric and the subsequent strain.
  • Figure 3 shows the layers of band/fabric on which the strips of volute shown in Figure 1 are applied.
  • the layers are composed of a first layer 4 of stiffening fibres longitudinally to the warp; a second layer 5 of stiffening fibres 5 in the direction of the weft is applied to the previous one; when the band/fabric is completed there may be a further layer or core 6 which, when a composite material is produced directly, may be omitted.
  • Figure 4 is a layout of strips 2 with volutes 3 like the one shown in Figures 1 and 3 .
  • the band/fabric in accordance with the invention is produced by "overlapping" the metal thread in pseudoelastic material onto other stiffening fibres (glass, carbon, aramides, etc.), arranged longitudinally and fixed there with the help of other threads that are inserted transversally (without over-under crossing or crimping among the threads).
  • the direction of the fibres is usually that of maximum strain (under compression or traction) and it follows that the volutes 3 are aligned in the same direction T, which may be prevalently the optimal one for maximising the absorption of the vibration that is produced.
  • the diameter of the thread was advantageous if included between 0.050 and 0.250mm, while the volutes were formed with amplitudes (F) of between 3 and 20mm and wavelengths (L) of between 2 and 20mm.
  • the production of the fabrics or bands may take place with widths of between 3 and 1600mm and (theoretically) infinite lengths.
  • thermosetting resins epoxy resins, polyesters, vinyl resins, furan resins, etc. are used to impregnate the band or fabric and make it work in synchrony with the object to which it is to be applied.
  • the resin impregnation may be done either by direct manual application (paintbrush, roller etc.) or by infusion or extrusion using traction, thus achieving a rigid band which will then be attached to the final object.
  • the band or fabric may be inserted as they are or with other stiffening fabrics into the structure of the article or object for which it is designed to damp vibration, and then impregnated with resin as previously mentioned.
  • the band or fabric may be inserted as they are or with other stiffening fabrics between sheets of thermoplastic material and then moulded to obtain the article or object in which it is designed to damp vibration.
  • thermosetting materials high module
  • thermoplastic materials low elastic module
  • the band In testing the application of the band, it was used in the manufacture of a pair of skis, by inserting it into both the traction axis and the compression axis of the stress, longitudinally to the ski. The results obtained were reassuring and, when they were subjected to laboratory tests, the absence of vibration was highlighted, and furthermore, when tested on the ski slope, there was also considerable stability in the holes that are formed near to the doors.
  • the band/fabric 1 in accordance with the invention, with threads in pseudoelastic metal thread organised and arranged in strips of orientated volutes, makes almost full use of the characteristic of the material used, making it work in the field at marked hysteresis between stress and strain, dissipating energy during stress and reducing the subsequent elastic response that is typical of the materials with high elastic module, which notoriously also have good mechanical characteristics in response to stress.
  • This is a great advantage with respect to the use of threads arranged just longitudinally to the prevalent stress/strain direction known in the prior art.
  • the band/fabric is produced using the chain knitting technique (advantageously with crochet machine technology) which enables the production of fabrics where the various layers are not weaved as in traditional fabric, but simply placed onto each other and then linked to each other by a chain thread.
  • This effect is advantageous as, in the field of composite materials, the absence of crimps between layers reduces the de-lamination phenomenon of the composite.

Claims (15)

  1. Versteifungsgewebe oder -band in pseudoelastischem Material zur Schwingungsdämpfung in Elementen, die davon betroffen sind, umfassend eine Materialschicht aus einem Faden/Fäden aus einer Formgedächtnislegierung, mit einem Faden/Fäden, der/die in der Ebene der Schicht angeordnet ist/sind, dadurch gekennzeichnet, dass der Faden/die Fäden aus einer Formgedächtnislegierung in Streifen von Spiralen angeordnet ist/sind, welche mit der Ganghöhe (L) der Spiralen in Richtung des Kettfadens (O) und der Amplitude der Spirale (F) in Richtung des Schussfadens (T) orientiert sind.
  2. Gewebe oder Band nach Anspruch 1, welches wenigstens eine Schicht eines Trägermaterials zur Versteifung des Gewebes oder Bandes beinhaltet.
  3. Gewebe oder Band nach einem der Ansprüche 1 oder 2, wobei die in der Ebene angeordneten Streifen von Spiralen mit unterschiedlichen Fäden hergestellt sind und die Spiralen voneinander getrennt sind.
  4. Gewebe oder Band nach einem der Ansprüche 1, 2 oder 3, wobei die Streifen von Spiralen in der Ebene in den jeweiligen Spiralscheiteln zwischen den angeordneten Streifen durchdrungen werden.
  5. Gewebe oder Band nach einem der Ansprüche 1, 2 oder 3, wobei die Streifen von Spiralen in der Ebene in den jeweiligen Spiralscheiteln zwischen den angeordneten Streifen überlappen.
  6. Gewebe oder Band nach einem der Ansprüche 1, 2 oder 3, wobei die Streifen von Spiralen in der Ebene in den jeweiligen Spiralscheiteln zwischen den angeordneten Streifen überlappen und versetzt sind.
  7. Gewebe oder Band nach einem der Ansprüche 1, 2 oder 3, wobei die Streifen von Spiralen in der Ebene in den jeweiligen Spiralscheiteln zwischen den angeordneten Streifen durchdrungen werden, überlappen und versetzt sind.
  8. Gewebe oder Band nach einem der Ansprüche 1, 2 oder 3, wobei die in zwei Ebenen unterteilten Streifen von Spiralen bezogen auf diejenigen in der anderen Ebene in den jeweiligen Spiralscheiteln zwischen den angeordneten Streifen durchdrungen werden und versetzt sind.
  9. Gewebe oder Band nach einem der Ansprüche 1, 2 oder 3, wobei die in zwei Ebenen unterteilten Streifen von Spiralen bezogen auf diejenigen in der anderen Ebene in den jeweiligen Spiralscheiteln zwischen den angeordneten Streifen durchdrungen werden, überlappen und versetzt sind.
  10. Gewebe oder Band nach einem der Ansprüche 1, 2 oder 3, wobei die in zwei oder drei Ebenen unterteilten Streifen von Spiralen bezogen auf diejenigen in den anderen Ebenen in den jeweiligen Spiralscheitelpunkten zwischen den angeordneten Streifen durchdrungen werden, überlappen und versetzt sind.
  11. Gewebe oder Band nach einem der Ansprüche 1, 2 oder 3, wobei die Streifen von Spiralen eine Spiral- oder Wellenlänge (L) zwischen 2 und 20 mm aufweisen.
  12. Gewebe oder Band nach einem der Ansprüche 1, 2 oder 3, wobei die Streifen von Spiralen eine Spiralamplitude (F) zwischen 3 und 20 mm aufweisen.
  13. Gewebe oder Band nach einem der vorangehenden Ansprüche, wobei der Faden oder die Fäden aus einer Formgedächtnislegierung, der/die die Spiralen umfasst/umfassen, einen Durchmesser zwischen 0,050 und 0,250 mm hat/haben.
  14. Zusammengesetztes Band mit einer Schicht eines Versteifungsmaterials, um Schwingungen in dem Anwendungselement standzuhalten, wobei ein Faden oder Fäden aus einer Formgedächtnislegierung vorhanden ist/sind, angeordnet in der/den Ebene(n) der Schicht, wie in einem der vorangehenden Ansprüche beschrieben, dadurch gekennzeichnet, dass es einen Faden oder Fäden aus einer Formgedächtnislegierung aufweist, welcher/welche in Streifen von Spiralen angeordnet ist/sind, die bezogen aufeinander gleichförmig ausgerichtet sind in der/den Ebene(n) der Schicht.
  15. Zusammengesetztes Strukturelement mit einer Schicht eines Versteifungsmaterials, um Schwingungen in der Maschinenvorrichtung standzuhalten, für welche es vorgesehen ist, wobei ein Faden oder Fäden aus einer Formgedächtnislegierung vorhanden ist/sind, angeordnet in der/den Ebene(n) der Schicht, wie in einem der vorangehenden Ansprüche beschrieben, dadurch gekennzeichnet, dass es einen Faden oder Fäden aus einer Formgedächtnislegierung aufweist, welcher/welche in Streifen von Spiralen angeordnet ist/sind, die bezogen aufeinander gleichförmig ausgerichtet sind in der/den Ebene(n) der Schicht.
EP08014752A 2007-08-23 2008-08-20 Verstärkungseinlage oder -band in einem pseudoelastischen Material zur Schwingungsdämpfung Not-in-force EP2028309B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000270A ITMO20070270A1 (it) 2007-08-23 2007-08-23 Tessuto o nastro di rinforzo in materiale pseudoelastico per smorzare vibrazioni in elementi ad esse soggetti

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EP2028309A1 EP2028309A1 (de) 2009-02-25
EP2028309B1 true EP2028309B1 (de) 2011-02-23

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EP08014752A Not-in-force EP2028309B1 (de) 2007-08-23 2008-08-20 Verstärkungseinlage oder -band in einem pseudoelastischen Material zur Schwingungsdämpfung

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EP (1) EP2028309B1 (de)
AT (1) ATE499472T1 (de)
DE (1) DE602008005071D1 (de)
IT (1) ITMO20070270A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017007596A1 (de) 2017-08-13 2019-02-14 Solvo GmbH Formgedächtnisaktuatoranordnung und Verfahren für deren Herstellung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2959247B1 (fr) 2010-04-26 2012-06-08 Mdb Texinov Sa Textile a memoire de forme et procede pour sa realisation
GB2563870B (en) 2017-06-28 2022-11-02 Qinetiq Ltd Products comprising reinforcing fibres and shape memory alloy wires and methods of making thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58156063A (ja) * 1982-03-08 1983-09-16 金井　宏之 成形基材用シ−ト
JPS5988916A (ja) * 1982-06-30 1984-05-23 Kanai Hiroyuki 形状記憶合金複合繊維及びその繊維シ−ト状物
US5700337A (en) * 1996-03-01 1997-12-23 Mcdonnell Douglas Corporation Fabrication method for composite structure adapted for controlled structural deformation
JPH09208739A (ja) * 1997-01-13 1997-08-12 Tokin Corp シート状複合材料
AU1272899A (en) * 1997-10-20 1999-05-10 Terry L. Schneider Sports implement with enhanced energy transfer, control of flexion and vibrationdampening
US6267402B1 (en) * 1999-03-30 2001-07-31 Nitinol Technologies, Inc. Nitinol ski structures
US8951923B2 (en) * 2007-05-23 2015-02-10 The Boeing Company Hybrid composite structure having damped metallic fibers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017007596A1 (de) 2017-08-13 2019-02-14 Solvo GmbH Formgedächtnisaktuatoranordnung und Verfahren für deren Herstellung
WO2019034205A1 (de) 2017-08-13 2019-02-21 Solvo GmbH Formgedächtnisaktuatoranordnung und verfahren für deren herstellung
DE102017007596B4 (de) 2017-08-13 2019-12-19 Chr. Mayr Gmbh + Co. Kg Formgedächtnisaktuatoranordnung und Verfahren für deren Herstellung

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DE602008005071D1 (de) 2011-04-07
ATE499472T1 (de) 2011-03-15
ITMO20070270A1 (it) 2009-02-24
EP2028309A1 (de) 2009-02-25

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