WO2015114259A1 - Procédé de simulation de mise en forme d'une bande textile sur un moule de révolution - Google Patents
Procédé de simulation de mise en forme d'une bande textile sur un moule de révolution Download PDFInfo
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- WO2015114259A1 WO2015114259A1 PCT/FR2015/050205 FR2015050205W WO2015114259A1 WO 2015114259 A1 WO2015114259 A1 WO 2015114259A1 FR 2015050205 W FR2015050205 W FR 2015050205W WO 2015114259 A1 WO2015114259 A1 WO 2015114259A1
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- warp
- winding
- calculation
- mold
- length
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/14—Making preforms characterised by structure or composition
- B29B11/16—Making preforms characterised by structure or composition comprising fillers or reinforcement
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/12—Cloth
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/24—Sheet material
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
Definitions
- the present invention relates to a method for simulating the shaping of a textile web by winding on a mold having a shape of revolution, the textile web being produced by three-dimensional weaving between a plurality of layers of warp threads and a plurality of layers. weft threads, the warp son layers being interconnected by weft threads.
- the invention finds a particular but not exclusive application in the prediction of the decadration during the shaping of a textile strip by winding in order to form a fiber preform of a composite material part such as a casing for an aeronautical engine, for example a fan case.
- a composite material part such as a casing for an aeronautical engine, for example a fan case.
- the warp threads which are oriented in the winding direction, and the weft threads of the textile web are orthogonal.
- straights appear in the strip.
- "Decadding" here means any angle between a warp and a weft that is different from 90 °, initial weave angle between the warp son and weft son.
- a method for simulating the shaping of a textile strip by winding on a mold having a surface of revolution the textile strip being produced by three-dimensional weaving between a plurality of layers of warp yarns and a plurality of weft yarn layers, the warp yarn layers being interconnected by weft yarns,
- the positioning of crossing points between at least a part of the warp yarns of the warp yarn layer and at least a portion of the weft yarns the yarns warp of said at least one warp yarn portion comprising a reference warp yarn having a determined axial position on the mold, the positioning of the crossing points comprising, for each weft yarn of said at least part of weft yarns:
- the positioning of the common crossing points each corresponding to a cross between the weft yarn and a warp of said at least part of the warp yarns the positioning of the current crossover points being made as a function of the position of the crossover point reference, the calculated winding length increment for the warp yarn and the geometry of the surface on which the textile web is deposited, the reference crossover point and the common crossover points forming in the direction of the weft yarn a row of crossing points,
- the textile web comprises warp threads of different lengths and the calculation of a winding length increment for each warp thread is made according to the length ratios between the webs. warp threads.
- the method of the invention is able to simulate the shaping of a fibrous web which is not flat at the weaving exit due to the presence of warp threads of different lengths.
- the calculation of a winding length increment for each warp thread is furthermore carried out according to a first increment length calculation mode in which the length increment d winding of the considered warp yarn is equal to the length increment of the reference warp thread multiplied by the ratio of the lengths between the warp thread considered and the reference warp thread and according to a second increment calculation mode of length in which the length increment of the considered warp thread is equal to the length increment of the reference warp thread multiplied by the ratio between the remaining lengths in the warp of the reference warp and the warp thread.
- the transition between the first mode and the second calculation mode being progressive by weighting the contribution of the first and second calculation mode during the winding. ent.
- the simulation method of the invention takes into account a phenomenon observed by the Holder: the decadrations in the textile band are increasing at the beginning of winding and then decreasing at the end of winding, which is due in particular to the fact that there is no or very little tension in the band at the beginning of the winding which can therefore be deformed freely while this tension is greater at the end of the winding at least because of the accumulation of turns on the mold .
- the distal end of the textile strip can be maintained by a device capable of applying a variable tension on the strip, which further influences the growth and decay of the decaditions respectively at the beginning and at the end. winding.
- the progressive transition between the first mode and the second length increment calculation mode is performed by weighting the contribution of the first and the second calculation mode as a function of the voltage applied to the band.
- the textile band can also be wound without tension or with a constant tension.
- the progressive transition between the first mode and the second length increment calculation mode is performed by weighting the contribution of the first and the second calculation mode as a function of the progression of the winding.
- the axial position of the reference warp thread may be fixed throughout the winding or vary over it.
- the positioning of the crossing points is furthermore performed as a function of a transition zone corresponding to the transition between the end of a complete revolution of the textile strip on the mold and the beginning. of a next turn. Therefore, the method of the invention is able to simulate the shaping of the textile web specifically for each turn of the winding
- the mold surface has portions having different radii.
- the method can therefore simulate the shaping of a textile strip on a mold that does not correspond to a perfect cylinder, as is the case of an aircraft engine casing.
- the various steps of the simulation method are determined by instructions of computer programs.
- the invention also relates to a program on an information carrier, this program being capable of being implemented in an estimation device or more generally in a computer, this program comprising instructions adapted to the implementation of steps of an estimation method as described above.
- This program can use any programming language, and be in the form of source code, object code, or intermediate code between source code and object code, such as in a partially compiled form, or in any other desirable form.
- the invention also relates to a computer-readable or microprocessor-readable information medium, and comprising instructions of a program as mentioned above.
- the information carrier may be any entity or device capable of storing the program.
- the medium may comprise storage means, such as a ROM, for example a CD ROM or a microelectronic circuit ROM, or a magnetic recording medium, for example a floppy disk or a disk. hard.
- the information medium may be a transmissible medium such as an electrical or optical signal, which may be conveyed via an electrical or optical cable, by radio or by other means.
- the program according to the invention can be downloaded in particular on an Internet type network.
- FIG. 1 is a schematic perspective view showing the shaping of a textile strip by winding on a mold having a shape of revolution
- FIG. 2 is a diagram showing a cylindrical coordinate system used by the simulation method for shaping a textile strip by winding on a mold according to the invention
- FIG. 3 is a schematic view showing the positioning of crossing between warp yarns and weft yarns in accordance with one embodiment of the invention
- FIG. 4 illustrates an example of determining the position of a current crossover point according to the method of the invention
- FIG. 5 illustrates an example of rectification of the position of a crossover point as a function of the thickness of the already wound textile strip and the geometry of the winding
- FIGS. 6A and 6B are diagrammatic views showing the winding of two warp yarns on parts of a mold having different radii
- FIG. 7 is a curve showing an example of the evolution of the tensile force on a textile strip as a function of the winding angle.
- the invention generally applies to the simulation of shaping of a textile strip by winding on a mold having a surface of revolution, the textile strip being made by three-dimensional weaving between a plurality of layers of threads. chain and a plurality of weft son layers.
- the textile structure is made in known manner by weaving by means of a jacquard loom on which a bundle of warp yarns or strands has been arranged in a plurality of layers, the warp yarns being bound by yarns of frame.
- the fibrous texture is made by three-dimensional weaving.
- three-dimensional weaving or “3D weaving” is meant here a weaving mode whereby at least some of the weft yarns bind warp yarns on several layers of warp yarns or vice versa.
- An example of three-dimensional weaving is so-called “interlock” weaving.
- interlock weaving is meant here a weave weave in which each layer of weft threads binds several layers of warp yarns with all the yarns of the same weft column having the same movement in the plane of the weave .
- the weft threads are introduced between the warp threads in a direction orthogonal to that of the warp threads. Therefore, at the end of weaving and before winding it on the mold, the textile band comprises warp threads and weft threads which are orthogonal.
- the method of the invention makes it possible to simulate the positioning between the warp yarns and the weft yarns of the textile strip when this it is wound on a mold of revolution shape and reveal including the decading that can occur between the warp son and weft son during this shaping.
- "Decadding” here means any angle between a warp and a weft that is different from 90 °, initial weave angle between the warp son and weft son.
- the steps of the simulation method of the invention described below can be performed by instructions of a computer program or corresponding simulation software.
- a computer-type simulation device comprising in particular a processor, a read-only memory, a random access memory, a volatile memory and means for entering data is used.
- the ROM of the simulation device is a recording medium according to the invention, readable by the processor and on which is recorded a computer program or simulation software according to the invention, including instructions for execution steps of an estimation method according to the invention described later.
- FIG. 1 shows a mold 10 intended for shaping a textile strip 20 by winding, the strip 20 being intended to form the fiber reinforcement of an aircraft engine fan casing made of composite material.
- the casing is made by injecting a resin into the textile band shaped on the mold and polymerizing said resin.
- the surface 10a of the mold 10 on which the textile strip is to be wound does not correspond to a perfect cylinder but comprises vertical flanges 11 and 12 present respectively on the two ends of the mold.
- the central portion 13 of the mold 10 has a surface close to the horizontal but with nevertheless variations in radius. Therefore, when it is shaped by winding, the method of the invention will simulate the position of the crossing points between the warp and the weft son according to the shape of the surface on which the textile strip is deposited, this surface corresponding to the surface 10a of the mold 10 during the first winding turn and then to that of the textile web wound in the previous round for the next laps.
- the textile strip 20 was obtained by three-dimensional interlock weave weaving using warp yarns of different lengths. function of their position, that is to say according to the final radius of the portion of the part concerned, here a housing.
- the textile strip 20 comprises longer warp threads on its edges 21 and 22 and in its central portion 23 because the selvedges 21 and 22 are intended to be shaped on the flanges 11 and 12 which have radii greater than the central portion 13 of the mold 10.
- the direction of rotation of the mold 10 is indicated by the arrows SR in FIG.
- the method of the invention uses a purely geometric method to simulate the positioning of the crossing points between the son, no balance calculation of the textile strip during its winding is realized.
- the calculation of the draping of the textile strip is made from a surface of revolution which corresponds to the surface on which the strip is wound.
- the simulation of the positioning of the warp yarns and the weft yarns of the fibrous web consists of calculating the position of the crossing points between the warp yarns and the weft yarns by projecting the textile web onto the winding surface and generate a three-dimensional mesh from finite elements of quadrangle shell type.
- Each quadrangle comprises 4 nodes each formed by a crossing point, the sides of each quadrangle being formed by the lengths of the warp and weft son present between the nodes, that is to say between the crossing points.
- the global coordinate system used for the simulation is a XYZ cylindrical coordinate system as shown in FIG. 2.
- the simulation software works in a local cylindrical coordinate system whose axes are as follows:
- Xloc axial direction parallel to the X axis of the mold 10 and that of the motor shaft for driving the mold 10 in rotation during the winding;
- Zloc tangential direction (to form a direct orthonormal reference).
- the tangential position of the points created by the simulation software is represented by the winding angle ⁇ .
- the mold does not rotate. It is the textile band 20 which rotates around the mold.
- DE represents the tangential direction of advancement of the textile strip 20 on the mold 10, that is to say the winding direction of the strip. DE is directed in a direction opposite to the direction of rotation SR of the mold 10 shown in FIG.
- the starting position Po of the winding is at a fixed angular position.
- the winding begins at the 0 ° angular position, i.e. the starting position Po, in the overall coordinate system, angle possibly modified by an initial tangential offset. However, the position of the last stitch wound around the mold.
- the winding is in the direct trigonometric direction.
- the warp threads of the textile web are wound in the tangential direction while the weft threads are positioned in a direction approximately parallel to the X axis of the mold 10.
- the positioning of the crossing points is made from a reference warp thread having a determined axial position on the mold.
- FIG. 3 very schematically illustrates the principle of calculation and the order of positioning of each point of intersection on a portion of textile strip 200 wound on a mold 100 of revolution shape. Successive rows of crossing points are created in the tangential direction of the winding DE from the starting point of the winding.
- the warp thread C3 here represents the reference warp thread, that is to say the warp thread whose axial position on the mold 100 is identified throughout the winding.
- the first row Rgl of crossing points PCn to PCi5 corresponds to the intersections between the weft thread Ti and the chain thread Ci to C5. This first row corresponds to the start of the winding, that is to say to the initial end of the textile strip 200 fixed on the surface of the mold 100.
- the first row Rgl of crossing points PCn to PCis is created to initialize the calculation. It corresponds to the starting position Po shown in FIG. 2. This row is created on an area extending at half the thickness of the textile strip of the first turn of winding of said strip on the mold (the strip is wound on several turns to form the final preform). To create this first row:
- the user defines, in the calculation data of the simulation software, the positions of the points of the curves defining the surface of the mold, namely the geometry or relief of the surface on which the textile strip is wound, and the final surface of the casing to be made (ie the outer surface after complete winding of the textile web and injection and polymerization of the resin in the shaped web);
- the positions of the points of the first row Rgl are calculated between these two surfaces in an area extending above the surface of the mold at a height thereof corresponding to half the thickness of the textile strip because it is the first winding turn;
- an initial tangential offset may be defined by the user to reflect the fact that the fabric may not be hooked onto the mold exactly one weft yarn.
- the software implementing the method of the invention then calculates the position of each crossing point for each successive row of points, here the rows Rg2 to Rg5. For each of these rows, the software creates:
- This reference wire is located towards the middle (in the axial direction X) of the mold.
- the other points of the row are created starting from the reference point by moving towards the upstream direction DAM of the mold and then moving towards the downstream direction DAV of the mold.
- the software will first calculate the position of a reference cross point corresponding here to the point PC23, namely the crossing point between the weft thread T2 and the reference warp thread C3. The software then calculates the position of the other common crossing points of this second row from the position of the reference crossover and as a function of length increments of the warp yarns calculated by the software for each row of crossing points and the geometry of the surface on which this portion of the textile web is draped.
- the software calculates, on the one hand, the position of the PC22 and PC21 points located on the upstream side of the reference crossover point PC23 and, on the other hand, the position of the PC24 and PC25 points located on the downstream side of reference cross point PC23.
- the software performs the same positioning calculations for the points PC31 to PC35, PC41 to PC45 and PC51 to PC55 respectively corresponding to the third, fourth and fifth rows of cross points in the direction of winding.
- the distance in the axial direction, that is to say the weft direction, between two adjacent crossing points is equal to the spacing between the two corresponding warp threads, this distance being able to vary according to the variation of the radius of the mold between the two crossing points.
- the position of the weft yarns with respect to the warp yarns is then deduced from the positioned crossover points, the length of the weft yarns initially present between the warp yarns being retained.
- the conservation of the curvilinear abscissa of the rows of crossing points representing the weft threads makes it possible to respect the non-slip principle of the weft threads with respect to the warp threads at the level of the intersections between these threads.
- the simulation software can generate a three-dimensional mesh with shell-type finite elements formed by quadrangles whose sides will define the directions of the wires. Once the crossing points are calculated, they are no longer modified to respect the fact that the wrapped textile band does not slip.
- increments of lengths of warp threads For each new row of crosspoints added by the software, it will calculate increments of lengths of warp threads. These increments will define the lengths of the sides of the finite elements of the shell mesh (quadrangles) in the warp direction produced by the software. The calculation of these length increments depends on the relative lengths of the warp threads between them.
- each reference cross point on the reference wire corresponds to the axial position of this wire which is constant and defined by the user in the calculation data.
- the tangential position (Zloc) of the reference point of the row n (for a winding angle ⁇ ⁇ ) is equal to:
- the winding angle is zero by default or equal to any initial tangential offset defined by the user in the calculation data.
- the radial position R n (Yloc) of the reference crossover point is defined as follows:
- k index of the winding revolution being calculated. If outside the transition zone, k is the index of the turn in which the reference point is located. Otherwise we are in the transition zone corresponding to the passage from turn k to turn k + 1.
- Rk radius of reference crosspoints for turn k.
- R k radius of the mold surface at the axial position (Xloc) of the crossover point considered + ((k-1) x thickness of the textile web) + 1/2 thickness of the textile web.
- the radius of the surface of the mold used to calculate Rk is derived from the calculation data previously entered by the user. Before the simulation, the user enters the value of the radius of the mold corresponding to an axial position of a cross point, here the axial position of the reference cross point.
- the new row Rgn is calculated with a wire length increment dl_ n of reference warp thread equal to:
- the simulation software calculates the position of the other crossing points, called "common crossing points", on the row considered.
- Figure 4 shows an example of calculation of common crossing points.
- the crossing points PCA and PCc are two consecutive points on the row n-1, for example points of the first row of crossing points (row Rgl of FIG. 2) or of another row of cross points already created.
- the crossing point PCB is a point of the next row n in the chain direction De. It is sought to calculate the position of the new PCD point, which is the following of the PCB point on the row n.
- the PCA and PCB points can be reference crosspoints or common crosspoints.
- current crossover points can be determined directly or indirectly according to the reference crossover point. Indeed, if the current cross point whose coordinates are to be determined is adjacent to the reference cross point of the considered row of points, the positioning of the current cross point is made according to the position of the reference cross point. . On the other hand, if the current cross point whose coordinates are to be determined is not adjacent to the reference cross point of the considered row of points, the positioning of the current cross point is made according to the position of the point of adjacent current crossing already calculated directly or indirectly from the position of the reference cross point. The calculation of the position of a current cross point is done step by step.
- PCD is determined as:
- axial position (Xloc) of the PCD point is determined.
- PCc, PCD] length increment of the considered warp thread.
- tangential position (Zloc) of the PCD point is determined.
- the radial position (Yloc) of the PCD point is firstly determined as corresponding to the radial position in the plane formed by the points PCA, PCB and PCc whose cylindrical coordinates (Xloc, Yloc, Zloc) are known.
- the textile strip intended to be wound on the mold is woven so that the lengths of the warp yarns are different according to the position of these yarns (differential call technology of the wires).
- the lengths of the warp threads must be greater in the lateral flanges of the mold (flanges 11 and 12 in FIG. 1) than in the central part since the radii of the cross points on the flanges are greater than the radius of the points. crossing on the central part.
- the simulation software takes into account this difference in length in the calculation of the length increments of the warp threads.
- the user defines the length ratios of the warp threads in the calculation data.
- the calculation software then rectifies the position of the PCD point determined previously taking into account the thickness of fibrous web already wound before the turn during winding.
- the rectification mainly concerns the radial position of the PCD point which must be determined according to an orthogonal projection from the surface of the mold to the axile position considered.
- the points Au, A ,, A i + 1 are the successive points defining the curvature of the surface of the mold in the axial directions D A and radial directions D R thereof. . These points are defined in the calculation data of the simulation software.
- the PCD point is that derived from the calculation of the step described above.
- the point PCD p is the projection of the PCD point on one of the segments of the curvature of the lower surface of the mold.
- the PCDi point is located on the [PCDp, PCD] segment and the length (PCDp, PCDI) is equal to the tissue thickness at the PCD point. This thickness is equal to:
- the thickness takes into account a linear transition making it possible to pass from turn k to turn k + 1, according to the formula already described above. above for the points of the reference warp thread.
- PCDi therefore corresponds to the consolidated radial position (Yloc) of the PCD point.
- the calculation of wire length increments must take into account the progress of the winding for optimal simulation. Indeed, the Holder observed that the extent of the decays varies non-homogeneously during the winding.
- the method of the invention and its associated software can thus take into account the fact that the part of the textile strip remaining to be wound is hooked at its end and that towards the end of the winding this end gets closer to the winding area of the fabric, by calculating the length increments following first and second calculation modes. This attachment influences the positioning of the points by tending to correct any tangential offsets that may have appeared during the calculation. This influence is taken into account in the second method of calculation.
- the first method of calculation is used at the beginning of winding, that is to say when the distal end of the textile strip is still far from the winding and the tension force in the textile strip is low.
- the textile web can be freely deformed and the length increment of a warp thread is equal to the increment of length on the reference warp thread multiplied by the ratio of the lengths between these two threads whose value is provided to the software as input data.
- the second calculation mode is used at the end of winding when the end of the textile strip approaches the winding zone and the tension force on the strip is important.
- the band can not deform freely and tends to straighten up, the deformation in the wound part being similar to the deformation in the remaining part of the band.
- the length increment of a warp thread is equal to the length increment on the reference wire multiplied by the ratio of the remaining textile strip lengths on these two threads, the initial length of the tape. being provided to the software as input data.
- the transition from the first calculation mode to the second calculation mode is carried out progressively by applying a variable weighting between the two calculation modes as the winding progresses.
- FIG. 6A shows the position of two warp yarns of a textile strip 50 from its winding on a mold 60, the thread 51 corresponding to the reference warp thread and the thread 52 another warp thread of the strip 50
- the total length of the band 50 at the beginning of the winding is defined by the user in the calculation data of the simulation software. This length is set for the reference string.
- the total length of the other warp threads is deduced by multiplying the length of the reference warp thread by the ratio of the lengths between each warp thread and the reference warp thread (also defined in the calculation data).
- the points PC3 and PC4 correspond to the distal ends of the warp threads 51 and 52 which are held by a mobile system controlled by tension (not shown in FIGS. 6A and 6B).
- the points PCi and PC2 correspond respectively to the proximal ends of the son of chains 51 and 52 fixed on the mold 60.
- a weft thread 70 crosses the reference warp thread 51 at the point PCi and the warp thread 52 at the point PC2. Likewise, a weft yarn 72 crosses the reference warp thread 51 at the point PC3 and the warp thread 52 at the point
- Figure 6B shows the position of the warp son 51 and 52 after winding the band by an angle ⁇ .
- the reference warp thread 51 is wound on an area of the mold 60 having a radius greater than the area of the mold on which the warp thread 52 is wound.
- the points PCi and PC2 turned at the same angle ⁇ and the points PC3 and PC4 came closer to the already wound part of the bandaged.
- the points PC5 and PC6 respectively correspond to the points of intersection between the reference warp thread 51 and the warp thread 52 with a weft thread 71.
- the point PC5 corresponds to the point of tangency of the reference warp thread 51 with the mold 60 after winding of the textile band 50 on the mold 60 of an angle ⁇
- the PC6 point is already present in the portion of the strip 50 wound on the mold 60 showing the existence of a decadration at this level in the textile strip.
- the point PC6 could also be in the portion of the textile strip 50 that is not yet wound on the mold 60. Moreover, if no decadration is present at the cross points between the chain son 51 and 52 and the weft thread 71, the points PC5 and PC6 correspond to the points of tangency of the threads 51 and 52 with the mold 60.
- the software can calculate the length increment [PCi, PC6] of the warp thread 52 according to the two defined calculation modes.
- the increment [PC2, PC6] i is equal to the increment [PCi, PC5] multiplied by the ratio of the lengths of the warp son 51 and 52 supplied to the software as input data.
- the increment [PC2, PC6] 2 is equal to the increment [PCi, PC5] multiplied by the ratio [PC6, PC4] / [PC5, PC3] corresponding to the ratio of the remaining lengths of the wires chain 51 and 52.
- the simulation software calculates the length increments [PC2, PC6] i and [PC2, PC6] 2 according to the two calculation modes and combines them with a weighting function to determine the length increment.
- final [PC2, PC6] By way of nonlimiting example, the final length increment [PC2, PC6] can be determined as follows:
- This weighting is based on the value of the tensile force applied to the fabric.
- the evolution of this effort during the calculation is defined by the user in the software data. EffortMax and EffortMin are the maximum and minimum values of the effort, and Effort is the current value.
- EffortMax and EffortMin are the maximum and minimum values of the effort, and Effort is the current value.
- Figure 7 shows an example of evolution of the tensile force as a function of the winding angle.
- the textile strip has a defined length corresponding to the number of desired winding turns and is maintained at its distal end throughout the winding, for example by a mobile system controlled voltage.
- the gradual transition between the first calculation mode and the second calculation mode is performed as a function of the control of the tension force on the strip.
- the length of coiled textile tape can be taken from a very long tape stored on a reel which is cut at the end of the winding.
- the strip is wound without tension or with a constant tension throughout the winding, the gradual transition between the first calculation mode and the second calculation mode being managed according to the progress of the winding.
- the method of the invention and its associated software are able to take into account a winding made over several turns by identifying the position of the transition zone between two consecutive turns.
- data and / or parameters must be supplied to the simulation device.
- These data / parameters can be divided into three categories: the data to define the crankcase geometry, the data to define the textile band and the calculation control parameters.
- crankcase geometry and winding progress are:
- winding surfaces of the mold these can be derived from a mold model of the CAD made for example with the Catia® software. In the simulation software of the invention, these surfaces are defined as the intersecting lines of these CAD surfaces with a radial plane. These lines are then discretized by a user with finite element pretreatment software to define the starting positions of the warp yarns at the beginning of the first winding turn.
- the data used to define the textile band are:
- the length ratios of the warp threads can be defined in two ways. In a first way, they are automatically calculated by the software from the geometric definition of the housing. The software then calculates the lengths of the son necessary to be able to drape without decadration the surface of the mold. In a second way, the lengths of the warp threads are introduced by a user into the simulation device from measurements made on part prototypes. These measurements may correspond to length measurements of the warp threads made at the time of weaving of the textile strip or to decadration measurements made during winding. In the latter case, the length ratios of the warp threads can be deduced from these scaling measurements.
- the calculation control parameters are:
- the simulation software of the invention can in particular produce data files relating to the draping of the strip on the mold, such as, for example, the angles present between the warp and weft threads. This data can then be used with spreadsheet software, such as Excel® software, to perform comparisons of decadence curves between the calculated values and the measured values.
- spreadsheet software such as Excel® software
- the data can also be produced in a file in neutral format viewable in a software operating results by finite elements, which makes it possible to obtain maps of the values of decadings turn by turn.
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Abstract
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/115,115 US10325038B2 (en) | 2014-01-29 | 2015-01-29 | Method of simulating shaping a textile strip on a mold presenting a surface of revolution |
GB1612810.0A GB2537779B (en) | 2014-01-29 | 2015-01-29 | Method for simulating the shaping of a textile strip on a rotating mould |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR1400226 | 2014-01-29 | ||
FR1400226A FR3016982B1 (fr) | 2014-01-29 | 2014-01-29 | Procede de simulation de mise en forme d'une bande textile sur un moule de revolution |
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WO2015114259A1 true WO2015114259A1 (fr) | 2015-08-06 |
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PCT/FR2015/050205 WO2015114259A1 (fr) | 2014-01-29 | 2015-01-29 | Procédé de simulation de mise en forme d'une bande textile sur un moule de révolution |
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US (1) | US10325038B2 (fr) |
FR (1) | FR3016982B1 (fr) |
GB (1) | GB2537779B (fr) |
WO (1) | WO2015114259A1 (fr) |
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CN111382477B (zh) * | 2020-03-02 | 2021-05-07 | 上海索辰信息科技股份有限公司 | 基于结构基因组技术的复合材料壁板分析方法 |
CN117779322B (zh) * | 2023-12-28 | 2024-05-31 | 福建鑫源欣纺织有限公司 | 一种纬编曲面成型织物的编织方法及系统 |
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2014
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- 2015-01-29 WO PCT/FR2015/050205 patent/WO2015114259A1/fr active Application Filing
Non-Patent Citations (2)
Title |
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AONO M ET AL: "FITTING A WOVEN-CLOTH MODEL TO A CURVED SURFACE: MAPPING ALGORITHMS", COMPUTER AIDED DESIGN, ELSEVIER PUBLISHERS BV., BARKING, GB, vol. 26, no. 4, April 1994 (1994-04-01), pages 278 - 292, XP000453445, ISSN: 0010-4485, DOI: 10.1016/0010-4485(94)90074-4 * |
SHRIKANT B SHARMA ET AL: "MOULDING ANALYSIS OF 3D WOVEN COMPOSITE PREFORMS: MAPPING ALGORITHMS", PROC. 12TH INT. CONF. COMPOS. MATER., PARIS, July 1999 (1999-07-01), pages 1 - 10, XP055189502 * |
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Publication number | Publication date |
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GB2537779B (en) | 2020-10-21 |
GB2537779A (en) | 2016-10-26 |
GB201612810D0 (en) | 2016-09-07 |
US10325038B2 (en) | 2019-06-18 |
US20170011152A1 (en) | 2017-01-12 |
FR3016982B1 (fr) | 2016-02-19 |
FR3016982A1 (fr) | 2015-07-31 |
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