Verfahren zur Herstellung textiler Verbundwerkstoffe mit höherer Rissfestigkeit und Fehlertoleranz

The invention relates to a method for producing composite materials (or. Composite materials) using textile fabrics (such as of carbon fibers, glass fibers, [...], natural fibers, etc.), whose structure aperiodic have differences in the interlace density, and the in conjunction with materials (such as plastic, concrete, etc.) for reinforcing or. Reinforcement (see Fig. 1) serve. The permanent oscillation of loose and dense Reinforcement or. Reinforcement in aperiodically order an irregularity or justified.

Inhomogeneity in the composite material.

Objective of the invention is, to propose a method as aforesaid, the textile composites more tear-firmlyfalse loads and defects in the material or to make robust against more further-rice-firmly and as a whole.

In particular through the composite having a plurality of layers of differently aperiodic woven textiles and thereby (test result according to ISO standards Table see below) further-rice-firmer comes for three-dimensional inhomogeneity of the material structure and in increased resistance to tear it. As a result of the loose reinforcements or occurring aperiodically. Reinforcements-and thus not locally occurring aperiodically planned breaking points-is effective at the same time the strain energy, but along such bodies into the material derived-delocalized. The composite material is more robust against false loads so as a whole, because any directed loading force by the aperiodic occurring constantly loses and attenuates new changes in direction in predetermined breaking points. Thus [...] of the damage of defects in the material and thus it is for for fault tolerance.

The description of the invention is illustrated by exemplary schematic drawings 1-4 Fig. Fig..

The invention relates to all Method for producing textile composite materials, in the matrix of the respective material one-or multi-layered woven textiles aperiodic bedding (Fig. 1 see, 3 and 4 Fig. Fig.) and thus no one-or multi-layered woven textiles periodically (such as in plain weave woven textiles-see Fig. 2) can bring in composite. Superposition of periodic and aperiodic tissue Moreover, there may be the combined be applied in the preparation of composite materials, so far without periodically woven textiles materials connected with their previous primitives to lose to improve. These procedures have excellent in the production of fiber composite materials the scope, as well as composite materials, wherein the components of a composite material may be again Composites ourselves in this respect.

In the manufacture of aperiodic woven textiles relates to the recursive method of the present invention (IR) the patent application Inductive rotation A1515/2011, wherein especially the Three-step-IR-method for such fabric production is important. It a woven fabric is produced with the aid of a computer-controlled Loom, wherein a weave pattern with a square basic shape, the corresponding to a crossing point of threads, in the tissue (see Fig. 1 and 3 Fig.) is arranged on several occasions.

The computer-control is effected in such a way that on a quadratic output figure Q, the composed of several square basic figures itself, therefore more crossing points of threads, , in a side-to-side center an information-Setting point of rotation, to obtain about 90° are positioned successively output figure then rotated three copies of such, 180 ° and 270° and fan-one behind the other is a composite Figure, which then as

_AOE280A2AO> [...][...][...]

output figure for a corresponding 90° about their successively rotated copies subsequent fan-like composition, 180 ° and 270° Setting, iteratively so as to develop great figures cross from crossing points of threads corresponding to tissue so arbitrarily, wherein each other aperiodic and asymmetrically above and below the threads in the fabric. Are not invariant basic figures Heat to upon rotation. As a result a precise overlap the triple step-IR-method of Figures generated at the same time a second, parallel, blinded, aperiodic and asymmetric weave pattern that sucked. Background-weave pattern, the weave pattern is different from the is situated behind and precisely in the foreground visible. The background fabric can serve as second superimposing tissue in composite be brought considerably strengthen and the composite three-dimensionally.

This fundamental method in which triple step-IR-method is illustrated below with reference to the drawings 5-7 even further exemplary Fig. Fig., wherein as an example the clockwise rotated and the central easternmost output figures each iteration are, i.e. furthest Setting output figures than right point of the point of rotation.

In Fig. 5a shows a square 5 Fig. output figure Q is a three-step-IR-method, the composed of several square basic figures itself, therefore more crossing points of threads, ; in the various stages of the first iteration (L) R Fig. 5b, starting from the 5a Fig. output figure Q according to; R = Q 5c shows the first three iterations of the recursion Fig., R (I), R (2) and R (3) next to one another and the repeated recursive application illustrates the triple step -5b in order to achieve more complex formations Fig. IR method according to;

Fig. 6 is a representation similar to Fig. 5c, wherein the output figure Q for the triple step-IR-method is divided in parts with different arrows indicated, to illustrate so the recoverable pattern, also in consideration of the asymmetry and [...] the case with this Weaving method-better;

Fig. 7 is a representation similar to Fig. 5c, wherein here the production of the aperiodic fabric, as represented in Fig. 3 is illustrated; the output figure Q is for the tissue engineering of the triple step-IR-method from a set of four- web knot corresponding to four end-intersections formed. We construct a network of lines (dark lines = threads), below or above the traverse each other aperiodic.

textile concentrationsaperiodic one differences in the weaving density lead to corresponding aperiodic.

From of the D. experimental station for textile and informatics according to the triple step has been examining a by means of a computer-controlled Jacquard loom aperiodic-IR-Method woven textile (see subsequent Test report-Table) ISO standards carried out according to EN. In the table is this aperiodic woven textile, comprising the woven structure represented as 1 in Fig., referred to as "IR prototype". " [...]" viscose staple fibres was found use of exemplary Under compared to warp and weft density much higher tear strength [...][...] the same as with periodic tissues [...] also in the weft direction in both. Moreover, due to the loose weave densities occurring aperiodically pointed out this test, as one would expect, higher air permeability of a glaring. maximum traction power Heat to equally and increased even slightly remained in the warp direction in the weft direction.

Source: National experimental station for information technology and textile, Vienna 9 January 2014, Checked by DI Christian tensioner

In composite material and at the same time, resulting in a higher resistance to tear is a higher fault tolerance particularly following the aperiodic inwoven or predetermined breaking points- [...] the loading force. Distribution of the damage to the material as a whole-to be expected.

The preparation of textile composite materials according to the present invention concerns in particular the range for producing a fiber composite material:

A composite fibre material generally of two main components: a bedding matrix and reinforcing fibers. By mutual interactions of the two components is more significant than any of the two participating components individually these material properties.

Unlike composite materials, such as reinforced concrete is used with the introduction of extremely thin fibers among other things, the effect of the ultimate strength. To are used to influence the strength in different directions are produced, instead of individual fibers woven or knit fabric, the prior to contact with the matrix.

Besides tissues from carbon, ceramic, aramid, boron, basalt, steel, nylon fibers in a composite with plastic [...] it are primarily the glass fiber textiles, but also concrete, metal, ceramic and carbon are used. In the carbon-more fiber-reinforced plastic (CFRP) fibre reinforced-Connected are in particular, glass fibre reinforced plastic material (GfK), (FIU) more aramide fiber-strengthened plastic, plastic composites more natural fiber-strengthened (WPC) (NFK) to name and Wood-Plastic-.

In the production of composite materials in addition to the material properties of the components in general with fabrics has also the geometry (size, shape, etc.) is essential. The geometric relationships with regard to their periodic and aperiodic network theorystructural order have to date been in particular also in the, method for designing fiber-Plastic Composites, shall not be taken into consideration.

To is explained as an example in the special manufacturing process subsequently the method according to the invention represent the invention in more detail by 1) carbon fibre reinforced plastic (CFRP) and 2) textile reinforced concrete ( textile concrete ).

1) a fiber composite (CFRP) denotes-Plastic carbon-more fiber-reinforced plastic, in which carbon fibers, usually in a plurality of layers, are embedded in a plastic matrix as a reinforcement.

The matrix usually thermosetting, for example, epoxy resin, of thermoplastics or of biopolymers. For thermally highly stressed components can also be bonded in a matrix of ceramic the carbon fiber.

The strength of a material made of CFRP is, as with all fiber-matrix-Connected, along the grain substantially higher than transversely to the fiber direction. The strength is less than for a non-reinforced matrix transverse for fiber. Therefore individual fiber layers are laid in different directions.

To be used to influence the strength are produced come see superimposed in different directions usually woven fiber textiles see in periodic plain weave (Fig. 2), the (Fig. 2a) prior to contact with the matrix and also in composite. In by means of the present invention are after the triple step-IR-Method aperiodic Computer controlled textile machines (see Fig. 1 and 3 Fig.) used fiber textiles woven. By multiple superposition of such textile fabric (see Fig. 4:3 superimposed Fig. Fig. 1) it is in a composite three-dimensionally in all directions for aperiodic or fiber reinforcement.

material armouring. This aperiodic reinforcement is achieved by a higher resistance to tear and, above all, of the composite material is given a greater tolerance to false loads[...] of the damage the. These helps very expensive treatments high speed construction construction units and the usually just for the production of coatings of the fibers would and, to achieve this strength to spare,.

2) In textile concrete technical textiles are used, usually lay-up,. As alkali-resistanthigh speed continuous fibers such as from textiles made of glass fiber material are viewed or carbon, have the virtue to rust, not. The present invention relates to the use of textile fabrics from yarns of these fibrous substances, the again there are composed from many continuous filaments (filaments) and processing after the triple step-IR-Method Computer controlled textile machines by means of to grid-like aperiodic weave structures. For superpositions of two or more such aperiodic textiles results in a composite with high-strength concrete in sandwich-Method _AOE296A0AO three-dimensionally> inhomogeneous more tear-firmlytextile concrete, by the significantly more robust against false loads and defects in the fine concrete is [...] of the damage.

Variability in the three-step-IR-Method output figures[...] different (= [...] ) (see, for example, 1 versus Fig. Fig. 3) different bond lead to the textile, so varies according to the type of manufacture and geometry of the textiles can tailor-made for a wide variety of applications and are provided output figure used.