CN-116288877-B - Reinforced groove-shaped three-dimensional integral fabric containing oblique yarns and weaving method thereof

CN116288877BCN 116288877 BCN116288877 BCN 116288877BCN-116288877-B

Abstract

The invention relates to a reinforced groove-shaped three-dimensional integral fabric containing oblique yarns, which comprises a horizontal plate fabric area, a vertical plate fabric area and a bottom plate fabric area, wherein the three areas comprise binding warp yarns, lining warp yarns, weft yarns and oblique yarns, the three areas are connected with each other through a yarn reserving method, the weft yarns and the oblique yarns are vertically turned from the horizontal plate fabric area to the vertical plate fabric area by taking the lining warp yarn direction as a normal direction in the connecting area of the horizontal plate fabric area and the vertical plate fabric area, the weft yarns are vertically turned from the bottom plate fabric area to the vertical plate fabric area along the lining warp yarn direction in the connecting area of the bottom plate fabric area, and all yarns are bound together through the binding warp yarns to be integrally woven and formed. The fabric structure of the invention improves the shearing performance in the structural surface of the structural prefabricated fabric due to the introduction of the oblique yarns, and improves the designability of the fabric with the reinforced groove-shaped structure due to the adoption of the reserved yarn process.

Inventors

ZHANG YIFAN
SHI ZHIWEI
CHEN LI
ZHANG QIAN
Feng Jiading
JIAO YANAN

Assignees

天津工业大学

Dates

Publication Date: 20260512
Application Date: 20230426

Claims (8)

1. A reinforced groove-shaped three-dimensional integral fabric containing oblique yarns is characterized by comprising a horizontal plate fabric area (1), a vertical plate fabric area (2) and a bottom plate fabric area (3), wherein the horizontal plate fabric area (1) is divided into an upper horizontal plate fabric area (11) and a lower horizontal plate fabric area (12), the upper horizontal plate fabric area (11) is divided into an upper horizontal plate flat fabric area (111) and an upper horizontal plate yarn-dividing fabric area (112), the lower horizontal plate fabric area (12) is divided into a lower horizontal plate flat fabric area (121) and a lower horizontal plate yarn-dividing fabric area (122), and the vertical plate fabric area (2) is divided into a left vertical plate fabric area (21) and a right vertical plate fabric area (22); The vertical plate fabric area (2) is arranged between the upper horizontal plate fabric area (11) and the lower horizontal plate fabric area (12), and the bottom plate fabric area (3) is connected to the rear end face of the combination of the horizontal plate fabric area (1) and the vertical plate fabric area (2), wherein the horizontal plate fabric area (1), the vertical plate fabric area (2) and the bottom plate fabric area (3) all comprise binding warp yarns (4), lining warp yarns (5), weft yarns (6) and oblique yarns (7); The weft yarn (6) is vertically turned from the bottom plate fabric area (3) to the vertical plate fabric area (2) along the direction of the warp yarn (5) in the area where the bottom plate fabric area (3) is connected with the vertical plate fabric area (2), the weft yarn (6) and the oblique yarn (7) are vertically turned from the upper horizontal plate yarn dividing fabric area (112) and the lower horizontal plate yarn dividing fabric area (122) to the left vertical plate fabric area (21) and the right vertical plate fabric area (22) by taking the direction of the warp yarn (5) as a normal direction, the oblique yarn (7) comprises a +theta oblique yarn (71) and a-theta oblique yarn (72), the +theta oblique yarn (71) and the-theta oblique yarn (72) are respectively woven into a group and respectively woven at different starting points, and the oblique yarn (7) is woven into two groups of the oblique yarn (72) in the upper horizontal plate yarn dividing fabric area (112), the lower horizontal plate yarn dividing fabric area (122) and the vertical plate fabric area (122) respectively, and the oblique yarn (25-theta (72) are respectively arranged in the oblique yarn area (7) with each group of the two groups of the +theta oblique yarns being arranged along the oblique yarn area (25-the two starting points.
2. The ribbed grooved three-dimensional monolithic fabric with diagonal yarns according to claim 1, characterized in that said upper (112) and lower (122) horizontal plate yarn-dividing fabric sections are connected to said vertical plate fabric section (2) by means of reserved yarns, and said bottom plate fabric section (3) is connected to said vertical plate fabric section (2) by means of reserved yarns.
3. A method of weaving a ribbed, channel-like, three-dimensional, monolithic fabric comprising bias yarns, the three-dimensional, monolithic fabric of claim 2, comprising the steps of: The method comprises the steps of S1, initial yarn arrangement of a reinforced groove-shaped three-dimensional integral structure, initial arrangement of edge yarns of oblique yarns (7) in an upper horizontal plate flat fabric area (111), a lower horizontal plate flat fabric area (121) and a bottom plate fabric area (3), initial arrangement of edge yarns of the oblique yarns (7) in the A, B, C areas, and initial arrangement of the edge yarns of the oblique yarns (7) in the upper horizontal plate flat fabric area (1), the vertical plate fabric area (2) and the bottom plate fabric area (3); S2, opening movement of the binding warp yarns (4) in the reinforced groove-shaped three-dimensional integral structure, wherein the opening movement comprises opening movement in a horizontal plate fabric area (1), a vertical plate fabric area (2) and a bottom plate fabric area (3), the movement directions of the binding warp yarns (4) in the horizontal plate fabric area (1) and the vertical plate fabric area (2) are mutually parallel and perpendicular to the movement directions of the binding warp yarns (4) in the bottom plate fabric area (3), and the movement directions of the binding warp yarns (4) in the flat plate fabric area (1), the vertical plate fabric area (2) and the bottom plate fabric area (3) are all parallel to the direction of the lining warp yarns (5) in the areas; s3, weaving motion of the oblique yarns (7) in the reinforced groove-shaped three-dimensional integral structure; s4, weft yarns (6) are introduced into the ribbed groove-shaped three-dimensional integral structure; and S5, pressing the weft yarn (6), and pressing the weft yarn (6) towards the direction of the interlining warp yarn (5) through a weft pressing device so as to restrict the movement of the yarn in the normal plane of the interlining warp yarn (5) in the vertical corner area of the reinforced groove-shaped three-dimensional integral structure.
4. The method for weaving a ribbed grooved three-dimensional monolithic fabric comprising diagonal yarns as set forth in claim 3, wherein said S1 comprises the steps of: S1-1, arranging spindles of a binding warp yarn (4) on guide bars of the binding warp yarn (4), wherein spindle arrangement of a horizontal plate fabric area (1) and a vertical plate fabric area (2) is in a reinforced groove shape, and spindle arrangement directions in the horizontal plate fabric area (1) and the vertical plate fabric area (2) are mutually perpendicular; S1-2, initially arranging edge yarns of the oblique yarns (7) in an upper horizontal plate flat fabric area (111), a lower horizontal plate flat fabric area (121) and a bottom plate fabric area (3) respectively; S1-3, initially arranging edge yarns of the oblique yarns (7) in the area A, wherein the left side edge of the area A is provided with a side strip (8) of the oblique yarns (7) at the upper and lower parts, and 1 +theta oblique yarn (71) and-theta oblique yarn (72) are respectively arranged on spindles of the left side edge yarns of the area A; s1-4, initially arranging edge yarns of the oblique yarns (7) in the area B, wherein the left side edge of the area B is provided with a side strip (8) of the oblique yarns (7) at the upper and lower parts, and 1-theta angle oblique yarns (72) and +theta angle oblique yarns (71) are respectively arranged on spindles of the left side edge yarns of the area B; s1-5, initially arranging the edge yarns of the oblique yarns (7) in the C area, arranging 1-theta oblique yarn (72) and +theta oblique yarn (71) on the spindle of the yarn on the right side edge of the C area, wherein the upper and lower edges of the right side edge of the C area are respectively provided with an edge strip (8) of the oblique yarns (7).
5. A method of weaving a ribbed grooved three-dimensional monolithic fabric comprising diagonal yarns as claimed in claim 3, characterized in that the direction of motion of the binder warp yarns (4) in the S2 in the horizontal plate fabric zone (1) and in the vertical plate fabric zone (2) is the z-axis direction and the direction of motion of the binder warp yarns (4) in the bottom plate fabric zone (3) is the y-axis direction.
6. The method for weaving a ribbed, grooved, three-dimensional, monolithic fabric comprising diagonal yarns as set forth in claim 3, wherein S3 comprises the steps of: S3-1, weaving the oblique yarns (7) in an upper horizontal plate flat fabric area (111), a lower horizontal plate flat fabric area (121) and a bottom plate fabric area (3); S3-2, weaving the oblique yarns (7) in the area A, wherein the total number of spindles of the oblique yarns (7) is divided into two groups, the +theta angle oblique yarns (71) starting from the upper left side of the area A are used as one group, the-theta angle oblique yarns (72) starting from the lower left side of the area A are used as the other group, when the +theta angle oblique yarns (71) starting from the upper left side of the area A move forwards to the right by one step distance, the-theta angle oblique yarns (72) starting from the lower left side of the area A move backwards to the right by one step distance, and when the +theta angle oblique yarns (71) and the-theta angle oblique yarns (72) move to the vertical corner areas of the reinforced groove-shaped three-dimensional integral structure, the downward forward movement and the upward forward continued movement are started respectively; S3-3, weaving the oblique yarns (7) in the area B, wherein the yarn spindles of the oblique yarns (7) are divided into two groups, namely-theta oblique yarns (72) starting from the upper left side of the area B are taken as one group, +theta oblique yarns (71) starting from the lower left side of the area B are taken as the other group, when the-theta oblique yarns (72) starting from the upper left side of the area B move forwards and downwards by one step distance, the +theta oblique yarns (71) starting from the lower left side of the area B move backwards and upwards, and when the-theta oblique yarns (72) and the +theta oblique yarns (71) move to the vertical corner area of the reinforced three-dimensional integral structure, the yarns start to move backwards and forwards respectively, and when the-theta oblique yarns (72) and the +theta oblique yarns (71) move to the vertical corner area of the reinforced three-dimensional integral structure again, the yarns start to move forwards and backwards upwards respectively; S3-4, weaving the oblique yarns (7) in the area C, wherein the spindles of the oblique yarns (7) are divided into two groups, one group of the-theta oblique yarns (72) which are arranged on the upper right side of the area C, the +theta oblique yarns (71) which are arranged on the lower right side of the area C are arranged as the other group, when the-theta oblique yarns (72) which are arranged on the upper right side of the area C are moved to the left front side by one step distance, the +theta oblique yarns (71) which are arranged on the lower right side of the area C are moved to the left rear side by one step distance, and when the-theta oblique yarns (72) and the +theta oblique yarns (71) are moved to the vertical corner areas of the reinforced groove-shaped three-dimensional integral structure, the downward front side and the upward front side continue to move respectively.
7. The method for weaving a ribbed, grooved, three-dimensional, monolithic fabric comprising diagonal yarns as set forth in claim 3, wherein S4 comprises the steps of: s4-1, weft yarns (6) are introduced into the upper horizontal plate flat fabric area (111), the lower horizontal plate flat fabric area (121) and the bottom plate fabric area (3); S4-2, weft yarns (6) are introduced into the upper horizontal plate yarn-dividing fabric area (112), the lower horizontal plate yarn-dividing fabric area (122) and the vertical plate fabric area (2), and when the weft yarns (6) move to the connecting area of the horizontal plate fabric area (1) and the vertical plate fabric area (2), the weft yarns are vertically turned from the upper horizontal plate yarn-dividing fabric area (112) and the lower horizontal plate yarn-dividing fabric area (122) to the vertical plate fabric area (2) until the fabric edge by taking the direction of the interlining warp yarns (5) as a normal direction.
8. A method of weaving a ribbed, grooved, three-dimensional, monolithic fabric comprising diagonal yarns as set forth in claim 7, characterized in that in S4, as weft yarn (6) moves into the area where base fabric area (3) joins vertical plate fabric area (2), weft yarn (6) is turned vertically from base fabric area (3) to vertical plate fabric area (2) in the direction of inlay warp yarn (5).

Description

Reinforced groove-shaped three-dimensional integral fabric containing oblique yarns and weaving method thereof Technical Field The invention belongs to the technical field of integral molding preparation of special-shaped piece three-dimensional fabrics, and particularly relates to a reinforced groove-shaped three-dimensional integral fabric containing oblique yarns and a weaving method thereof. Background The composite material is the most important aerospace material other than aluminum, and since the composite material has the advantage of being lightweight, the share of civil aircraft structural weight is more than 15% and the share of helicopter and fighter aircraft structural weight is more than 50% in the last decades. Currently, in the aerospace field, two types of composite materials are mainly used, namely laminated composite materials and woven composite materials, and with the increasing application level of the composite materials and the increasing design requirements of an airplane, the woven composite materials are gradually favored materials in the aerospace field, such as airplane fan blades and airplane aileron structures. In aircraft aileron structures, the joint region is subjected to high torsional and shear loads in addition to tensile and bending loads. In existing woven composite aircraft aileron structures, the woven preform has poor ability to carry torsion and shear loads due to the presence of only warp and weft inlay yarns and binder yarns. In order to solve the problem, a beam structure is added in the structure through bolts, but the method causes two problems, namely, firstly, because bolts are added, holes are needed to be drilled on the structure, stress concentration is formed in the vicinity of the holes of the structure, and the tensile strength of the structure is reduced, and secondly, the weight of the whole wing structure is increased due to the addition of the beam structure, and fatigue reliability is reduced. Thus, increasing torsional and shear strength, maintaining tensile and flexural strength from the standpoint of the wing preform, is an important point of research by composite structural engineers and aircraft designers today. As shown in fig. 1, the existing aircraft aileron structure can be regarded as a parallel splice body with a plurality of reinforced groove structures, so that the research on the prefabricated member with the parallel I-shaped woven structure with higher torsion and shearing strength and the weaving method thereof has remarkable engineering practical value. The existing three-dimensional woven preform comprises two yarn systems, a binder warp system and a weft system, which are arranged in the forming direction of the fabric to form an overall non-layered three-dimensional structure by bending through several layers of weft yarns and binding the straightened weft yarns together. A straightened warp-in system may be incorporated into a typical three-dimensional woven preform structure to form a preform structure comprising a three-yarn system that may significantly enhance the warp-direction properties of the material. However, conventional three-dimensional woven composite in-plane yarns are distributed along the length and width directions, and the material properties have significant anisotropy, i.e., high properties along both main directions of the material, while in-plane shear properties are low. In paper "Experimental and numerical study of in-plane shear properties and failure process of multiaxial 3D angle-interlock woven composites", researchers compared the in-plane shear performance of multilayer multidirectional woven composites (MAWC) containing diagonal yarns with that of layered three-dimensional woven composites (3 DAWC). The results show that MAWC appears quasi-isotropic in-plane due to the presence of fibers oriented at ±45°, with a distinct peak, a maximum load of 9.6kN, a failure displacement of 1.4mm, a failure displacement of 1.2mm for 3dawc, a maximum load of only 3.8kN, much lower than the former, that is, a shear strength and an in-plane shear modulus of MAWC are 2.4 times and 3 times that of 3DAWC, respectively. Yarns in the + -45 deg. direction reinforce MAWC compared to 3DAWC, thereby increasing the in-plane shear deformation resistance of the material and exhibiting greater in-plane shear strength. In paper "Multiaxis 3D Woven Preform and Properties of Multiaxis 3DWoven and 3D Orthogonal Woven Carbon/Epoxy Composites", researchers performed in-plane shear tests on MAWC and 3 DAWC. The results showed that the in-plane shear strength and elastic modulus of MAWC and 3DAWC were 137.7MPa and 110.9MPa, 12.1GPa and 4.5GPa, respectively. The in-plane shear strength and in-plane shear modulus of MAWC are improved by approximately 25% and 170% over 3DAWC due to the addition of the bias yarn at the MAWC surface. These test results show that the bias yarn has a great enhancement to the in-plane performance of the wo