A three-dimensional integral T-shaped structure fabric containing oblique yarns and its weaving method
By introducing +θ and -θ angle oblique yarns into the three-dimensional integral T-shaped structure fabric, the failure problem of the three-dimensional woven T-shaped structure under in-plane shear load is solved, the bending and torsional resistance is improved, and the structural stability and engineering application value are enhanced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIANJIN POLYTECHNIC UNIV
- Filing Date
- 2023-04-26
- Publication Date
- 2026-05-26
AI Technical Summary
Existing three-dimensional woven T-shaped structural materials are prone to failure under in-plane shear loads and cannot effectively resist combined tensile, bending and torsional loads, resulting in poor mechanical properties.
By introducing +θ and -θ angle oblique yarns into a three-dimensional integral T-shaped structure fabric, a continuous yarn structure is formed through specific arrangement and movement, thereby enhancing the fabric's resistance to bending and torsion.
It improves the bending and torsional resistance of T-shaped structures, enhances structural stability, reduces vibration and noise, and extends service life, thus having good engineering application value.
Smart Images
Figure CN116732683B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of three-dimensional integral T-shaped structure fabric technology, and to the field of integral molding and preparation of irregular shaped three-dimensional fabrics. In particular, it relates to a three-dimensional integral T-shaped structure fabric containing oblique yarns and its weaving method. Background Technology
[0002] T-shaped structures are common structural components in engineering, such as turbine blades for aero-engines and large wind turbine blades. Their failure mode is mainly root fracture caused by tensile, bending, and torsional loads, or combinations thereof, on the web. Currently, common materials for T-shaped structures include metals (such as nickel-based alloys and titanium alloys), laminated composite materials, and three-dimensional monolithic woven composite materials. Among these materials, three-dimensional woven composite materials have the most promising development prospects, possessing good designability, strong fatigue resistance, high damage tolerance, and high specific stiffness / strength.
[0003] Generally, three-dimensional woven composite materials mainly consist of warp and weft yarn systems, with the warp yarns further including interlining warp yarn systems and splicing warp yarn systems. This yarn system gives three-dimensional woven composite materials strong integrity and fatigue resistance. However, for in-plane shear loads, such a yarn system cannot provide the expected resistance. Furthermore, T-shaped structures woven using such a yarn system (such as...) Figure 1As shown in the figure, due to its inability to resist in-plane loads, the T-shaped structure is also prone to failure under combined tensile, bending, and torsional loads, and its mechanical properties are not superior to those of general metal or laminated T-shaped structures. In the master's thesis "Strength Analysis and Experimental Verification of Blade-Casing Connection Structures of Different Materials," the author compared the advantages and disadvantages of three-dimensional woven composite material and laminated composite material T-shaped structures through experiments and simulations. The results showed that although T-shaped structures made of different materials have different mechanical behaviors, the shear and bending resistance of the three-dimensional woven T-shaped structure is not significantly better than that of the general laminated T-shaped structure. Therefore, in order to improve the in-plane shear characteristics of the three-dimensional woven T-shaped structure, it is considered to introduce oblique yarns during the weaving process. The invention patent CN106987979B, entitled "An Angular Interlocking Fabric Containing Bias Yarns and Its Weaving Method," and the utility model patent CN201720624578.3, entitled "An Angular Interlocking Fabric Containing Bias Yarns," disclose a method for introducing oblique yarns into a general three-dimensional woven fabric. This fabric includes a warp system, a weft system, a warp-insertion system, and also includes an oblique yarn system with an inclination angle θ to the fabric's length direction (warp direction), a +θ oblique yarn system, and a -θ oblique yarn system. The inclination angle θ of the oblique yarns and the arrangement position of the oblique yarn layers in the fabric's thickness direction (normal direction) are adjustable, improving the fabric's in-plane shear resistance and providing designable mechanical properties. The weaving method of this fabric is based on existing three-dimensional fabric weaving technology, introducing oblique yarns into the fabric through the movement of the oblique yarn spindles, forming a three-dimensional woven fabric containing oblique yarns. The process is simple and highly operable. However, although the patent introduces a bias yarn system into existing three-dimensional fabrics to improve the in-plane shear properties of the fabric, this method is difficult to directly apply to the weaving of T-shaped structures, which limits its engineering application value. Summary of the Invention
[0004] This invention provides a three-dimensional integral T-shaped structure fabric containing oblique yarns and its weaving method to solve the technical problems existing in the prior art, which has the characteristics of structural stability and high practical value.
[0005] This invention includes the following technical solutions:
[0006] A three-dimensional integral T-shaped structure fabric containing oblique yarns includes two parts: a wing fabric area 1 and a web fabric area 2. The wing fabric area 1 is divided into a wing yarn-splitting fabric area 11 and a wing straight fabric area 12. The web fabric area 2 is divided into a left web fabric area 21 and a right web fabric area 22. The wing yarn-splitting fabric area 11 is connected to the web fabric area 2 by pre-reserved yarns. Both the wing fabric area 1 and the web fabric area 2 include bonding warp yarns 3, interlining warp yarns 4, weft yarns 5, and oblique yarns 6. The oblique yarns 6 further include +θ angle oblique yarns 61 and -θ angle oblique yarns 62. The +θ angle oblique yarns 61 and -θ angle oblique yarns 62 are both positioned close to the weft yarns 5.
[0007] In the root corner area of the T-shaped structure, the directions of the warp yarn 4, weft yarn 5 and oblique yarn 6 are normal, wherein the weft yarn 5 and oblique yarn 6 are both perpendicularly turned from the wing plate yarn splitting fabric area 11 to the web fabric area 2; the knotting warp yarn 3 binds the other yarns (specifically the warp yarn 4, weft yarn 5 and oblique yarn 6) together in the wing plate fabric area 1 and the web fabric area 2 respectively, thereby making the fabric as a whole woven shape.
[0008] Furthermore, the wing plate fabric area 1 and the web fabric area 2 are designed with different fabric structures according to the mechanical performance requirements. The fabric structure includes the position of each yarn layer, the number of yarn layers, and the angle θ of the oblique yarn 6.
[0009] Furthermore, the angle θ of the oblique yarn 6 ranges from 25° to 65°.
[0010] Furthermore, the +θ angle oblique yarn 61 is located near the outer side of the T-shaped structure and is positioned between the connecting warp yarn 3 and the outer weft yarn 5; the -θ angle oblique yarn 62 is located in the middle of the T-shaped structure and is positioned between the connecting warp yarn 3 and the inner weft yarn 5; the +θ angle oblique yarn 61 and the -θ angle oblique yarn 62 are located in different planes and the spatial angle between them is 2θ.
[0011] A method for weaving a three-dimensional integral T-shaped structure fabric containing oblique yarns, comprising the following steps:
[0012] S1, Initial yarn arrangement of the T-shaped structure: including the initial arrangement of the connecting warp yarn 3, the lining warp yarn 4 and the bias yarn 6 in the wing fabric area 1 and the web fabric area 2 respectively; the edge yarns of the bias yarn 6 in the initial arrangement of the wing fabric area 1 and the web fabric area 2 respectively.
[0013] S2, the opening movement of the connecting warp yarn 3 in the T-shaped structure; wherein, the opening movement of the connecting warp yarn 3 includes the opening movement in the wing fabric area 1 and the web fabric area 2, and the planes formed by the interlacing movement of the connecting warp yarn 3 in the two areas are perpendicular to each other; the opening movement direction of the connecting warp yarn 3 is parallel to the direction of the backing warp yarn 4 in the T-shaped structure, that is, it moves in the warp direction.
[0014] S3, the movement of the oblique yarn 6 specifically includes:
[0015] S3-1, the movement of the oblique yarn 6 in the straight fabric area 12 of the wing plate;
[0016] S3-2, the movement of the oblique yarn 6 in the wing-plate yarn-separating fabric area 11 and the web fabric area 2; wherein, the spindles of the oblique yarn 6 are divided into two groups, one group consisting of the +θ angle oblique yarn 61 starting from the left side of the wing-plate yarn-separating fabric area 11 and the -θ angle oblique yarn 62 at the top of the left web fabric area 21, and the other group consisting of the -θ angle oblique yarn 62 starting from the right side of the wing-plate yarn-separating fabric area 11 and the +θ angle oblique yarn 61 at the top of the right web fabric area 22; when the +θ angle oblique yarn 61 on the left side of the wing-plate yarn-separating fabric area 11 moves one step forward to the right, the -θ angle oblique yarn 62 at the top of the left web fabric area 21 moves... The yarn 62 moves downward and forward by one step. When the +θ angle oblique yarn 61 and the -θ angle oblique yarn 62 move to the root corner area of the T-shaped structure, they begin to move upward and forward and to the left and forward, respectively. Similarly, when the -θ angle oblique yarn 62 on the right side of the wing plate yarn-separating fabric area 11 moves to the left and forward by one step, the +θ angle oblique yarn 61 at the top of the right web fabric area 22 moves downward and forward by one step. When the -θ angle oblique yarn 62 and the +θ angle oblique yarn 61 move to the root corner area of the T-shaped structure, they begin to move upward and forward and to the right and forward, respectively.
[0017] S4, the introduction of weft yarn 5 in the straight fabric area 12 of the wing plate, the yarn-splitting fabric area 11 of the wing plate and the fabric area 2 of the web plate in the T-shaped structure;
[0018] S5, Press the weft yarn 5; Press the weft yarn 5 towards the warp yarn 4 using the weft pressing device, while simultaneously restricting the movement of the yarn in the root corner area of the T-shaped structure in the normal plane of the warp yarn 4.
[0019] Furthermore, S1 specifically includes:
[0020] S1-1, the spindles of the connecting warp yarn 3 are arranged on the guide strip of the connecting warp yarn 3, and the spindles of the wing fabric area 1 and the web fabric area 2 are arranged in a T-shape vertical arrangement.
[0021] S1-2, the initial arrangement of the edge yarns of the oblique yarn 6 in the straight fabric area 12 of the wing plate;
[0022] S1-3, the edge yarns of the oblique yarn 6 are initially arranged in the wing-plate yarn-separating fabric area 11; there is an edge strip of oblique yarn 6 on the left and right edges of the wing-plate yarn-separating fabric area 11 and the top edge of the web fabric area 2; a +θ angle oblique yarn 61 is arranged on the spindle of the yarn on the left edge of the wing-plate fabric area 1; a -θ angle oblique yarn 62 is arranged on the spindle of the yarn on the right edge of the wing-plate fabric area 1; a -θ angle oblique yarn 62 and a +θ angle oblique yarn 61 are arranged on the spindles of the yarn on the top edge of the left web fabric area 21 and the right web fabric area 22, respectively, corresponding to the left and right edges of the wing-plate yarn-separating fabric area 11.
[0023] Furthermore, S4 specifically includes:
[0024] S4-1, the introduction of weft yarn 5 into the straight fabric area 12 of the wing plate;
[0025] S4-2, the introduction of weft yarn 5 in the wing-plate yarn splitting fabric area 11 and the web fabric area 2; when the weft yarn 5 moves from the wing-plate yarn splitting fabric area 11 to the root corner area of the T-shaped structure, it is introduced vertically towards the web fabric area 2 with the direction of the warp yarn 4 as the normal, until the top of the web fabric area 2.
[0026] Furthermore, the method to change the angle θ of the oblique yarn 6 is to change the arrangement density of the connecting warp yarn 3, the lining warp yarn 4 and the weft yarn 5, or to change the stepping motion of the oblique yarn 6 and the coordination of the introduced weft yarn 5, or to combine the two methods mentioned above.
[0027] Furthermore, changing the coordination between the stepping motion of the bias yarn 6 and the introduction of the weft yarn 5 means increasing the angle θ of the bias yarn 6 by increasing the number of steps of the bias yarn 6, or decreasing the number of times the weft yarn 5 is introduced to increase the angle θ of the bias yarn 6.
[0028] Furthermore, the geometric size and micro-parameters of the T-shaped structure need to be set according to the requirements of the engineering project. It is worth noting that all techniques not specifically described in this invention are prior art. The prior art includes: T-shaped structure fabrics without bias yarns and their weaving methods, and flat fabrics with bias yarns and their weaving methods.
[0029] The advantages and positive effects of this invention are as follows:
[0030] 1. Compared with T-shaped structure fabrics and their weaving methods that do not contain oblique yarns, the present invention includes oblique yarns, which improves the bending and torsional resistance of the T-shaped structure. In engineering applications of typical T-shaped structures (such as aero-engine turbine blades and large wind turbine blades), it can effectively improve the stability of the structure, thereby reducing vibration, reducing noise and increasing service life.
[0031] 2. This invention rationally introduces +θ angle oblique yarns and -θ angle oblique yarns into the T-shaped structure. Both +θ angle oblique yarns and -θ angle oblique yarns are positioned close to the weft yarns, making the fabric highly operable during weaving and possessing extremely high engineering application value. Both the weft yarns and oblique yarns turn vertically at the root corner area of the T-shaped structure, ensuring continuous yarn flow and enhancing the bending and torsional resistance of the root corner area. The +θ angle oblique yarn is located near the outer side of the T-shaped structure, positioned between the connecting warp yarns and the outer weft yarns, enhancing the bending and torsional resistance of the outer side of the T-shaped structure. The -θ angle oblique yarn is located in the middle of the T-shaped structure, positioned between the connecting warp yarns and the inner weft yarns, enhancing the bending and torsional resistance of the middle part of the T-shaped structure. The resulting three-dimensional integral T-shaped structure fabric exhibits even better performance. Compared to flat fabrics containing yoke yarns and their weaving methods, this invention mainly considers the process of reserving yarns, especially the process of reserving yoke yarns, thereby improving the designability of fabrics containing yoke yarns, enhancing the practical value of the fabrics, and possessing good engineering application prospects. Attached Figure Description
[0032] Figure 1 It is an existing T-shaped structure without oblique yarns;
[0033] Figure 2 This is a schematic diagram of the T-shaped structure containing oblique yarn in this invention;
[0034] Figure 3 This is a warp view of the T-shaped structure containing oblique yarn in this invention;
[0035] Figure 4 This is a schematic diagram of the fabric area of the wing plate of the present invention;
[0036] Figure 5 This is a schematic diagram of the web fabric area of the present invention;
[0037] In the diagram, 1 represents the wing panel fabric area; 11 represents the wing panel yarn-separated fabric area; and 12 represents the wing panel straight fabric area.
[0038] 2 is the webbed fabric area; 21 is the left webbed fabric area; 22 is the right webbed fabric area;
[0039] 3 is the warp yarn for joining; 4 is the lining warp yarn; 5 is the weft yarn; 6 is the bias yarn; 61 is the bias yarn with a +θ angle; 62 is the bias yarn with a -θ angle. Detailed Implementation
[0040] To further disclose the invention's content, features, and effects, the following examples are provided in conjunction with the accompanying drawings for further detailed explanation. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention.
[0041] Example: See Appendix Figure 2-5A three-dimensional integral T-shaped structure fabric containing oblique yarns includes two parts: a wing fabric area 1 and a web fabric area 2. The wing fabric area 1 is divided into a wing yarn-splitting fabric area 11 and a wing straight fabric area 12. The web fabric area 2 is divided into a left web fabric area 21 and a right web fabric area 22. The wing yarn-splitting fabric area 11 is connected to the web fabric area 2 by pre-reserved yarns. Both the wing fabric area 1 and the web fabric area 2 contain bonding warp yarns 3, interlining warp yarns 4, weft yarns 5, and oblique yarns 6.
[0042] The oblique yarn 6 further includes a +θ angle oblique yarn 61 and a -θ angle oblique yarn 62; both the +θ angle oblique yarn 61 and the -θ angle oblique yarn 62 are positioned close to the weft yarn 5; the +θ angle oblique yarn 61 is located near the outer side of the T-shaped structure and is positioned between the connecting warp yarn 3 and the outer weft yarn 5; the -θ angle oblique yarn 62 is located in the middle of the T-shaped structure and is positioned between the connecting warp yarn 3 and the inner weft yarn 5; the +θ angle oblique yarn 61 and the -θ angle oblique yarn 62 are located in different planes and the spatial angle between them is 2θ;
[0043] In the root corner area of the T-shaped structure, the directions of the warp yarn 4, weft yarn 5 and oblique yarn 6 are normal, wherein the weft yarn 5 and oblique yarn 6 are both perpendicularly turned from the wing plate yarn splitting fabric area 11 to the web fabric area 2; the knotting warp yarn 3 binds the other yarns (specifically the warp yarn 4, weft yarn 5 and oblique yarn 6) together in the wing plate fabric area 1 and the web fabric area 2 respectively, thereby making the fabric as a whole woven shape.
[0044] Based on the description of this structure, set the following fabric parameters:
[0045] 1) Develop a T-shaped fabric with a width of 100mm, a length of 200mm for the wing fabric area 1, and a length of 100mm for the web fabric area 2.
[0046] 2) The warp yarn 3 is a 6k carbon fiber single strand, and the backing warp yarn 4, weft yarn 5, and bias yarn 6 are all 12k carbon fiber double strands; the backing warp yarn 4 (represented by 0), weft yarn 5 (represented by 90), +θ angle bias yarn 61 (represented by +θ), and -θ angle bias yarn 62 (represented by -θ) are arranged in the thickness direction of the wing fabric area 1 as [90 / -45 / 0 / 0 / +45 / 90 / +45 / 0 / 0 / -45 / 90], and in the thickness direction of the web fabric area 2 as [90 / 0 / -25 / +25 / 0 / 90 / 0 / +25 / -25 / 0 / 90].
[0047] 3) The arrangement density of the splicing warp yarn 3 and the lining warp yarn 4 is 4 yarns / cm, and the arrangement density of the weft yarn 5 is 4 yarns / cm.
[0048] 4) The number of rows of the splicing warp yarn 3 n = fabric width × warp density = 100 / 10 × 4 = 40 rows; the number of layers of the lining warp yarn 4 m = 2 layers.
[0049] 5) The number of rows of the lining warp 4, n', is equal to the number of rows of the splicing warp 3, n = 40 rows, and the number of layers of the lining warp 4, m', is 4 layers.
[0050] 6) The number of columns of the bias yarn 6, n”, is equal to the number of columns of the warp yarn, n = 40 columns; the number of layers of bias yarn, m'', is 4 layers.
[0051] 7) The inclination angle θ of the oblique yarn in the wing fabric area 1 is 45°, and the inclination angle θ' of the oblique yarn in the web fabric area 2 is 65°.
[0052] As attached Figure 2-5 As shown, according to the description and parameter settings of the prefabricated fabric with the T-shaped structure (the geometric size and micro-parameters of the T-shaped structure need to be set according to the requirements of the engineering project), the weaving method includes the following steps:
[0053] S1, the initial yarn arrangement of the T-shaped structure; including the initial arrangement of the bonding warp yarn 3, the interlining warp yarn 4, and the bias yarn 6 in the wing fabric area 1 and the web fabric area 2 respectively; the initial arrangement of the edge yarns of the bias yarn 6 in the wing fabric area 1 and the web fabric area 2 respectively; specifically also including:
[0054] S1-1, the spindles of the connecting warp yarn 3 are arranged on the guide strip of the connecting warp yarn 3, and the spindles of the wing fabric area 1 and the web fabric area 2 are arranged in a T-shape vertical arrangement.
[0055] S1-2, the initial arrangement of the edge yarns of the oblique yarn 6 in the straight fabric area 12 of the wing plate;
[0056] S1-3, the edge yarns of the oblique yarn 6 are initially arranged in the wing-plate yarn-separating fabric area 11; there is an oblique yarn 6 edge strip on the left and right edges of the wing-plate yarn-separating fabric area 11 and the top edge of the web fabric area 2; a +θ angle oblique yarn 61 is arranged on the spindle of the yarn on the left edge of the wing-plate fabric area 1; a -θ angle oblique yarn 62 is arranged on the spindle of the yarn on the right edge of the wing-plate fabric area 1; a -θ angle oblique yarn 62 and a +θ angle oblique yarn 61 are arranged on the spindles of the yarn on the top edge of the left web fabric area 21 and the right web fabric area 22, respectively, corresponding to the left and right edges of the wing-plate yarn-separating fabric area 11;
[0057] S2, the opening movement of the connecting warp yarn 3 in the T-shaped structure; wherein, the opening movement of the connecting warp yarn 3 includes the opening movement in the wing fabric area 1 and the web fabric area 2, and the planes formed by the interlacing movement of the connecting warp yarn 3 in the two areas are perpendicular to each other; the opening movement direction of the connecting warp yarn 3 is parallel to the direction of the backing warp yarn 4 in the T-shaped structure, that is, it moves in the warp direction.
[0058] S3, the movement of the oblique yarn 6 specifically includes:
[0059] S3-1, the movement of the oblique yarn 6 in the straight fabric area 12 of the wing plate;
[0060] S3-2, the movement of the oblique yarn 6 in the wing-plate yarn-separating fabric area 11 and the web fabric area 2; wherein, the spindles of the oblique yarn 6 are divided into two groups, one group consisting of the +θ angle oblique yarn 61 starting from the left side of the wing-plate yarn-separating fabric area 11 and the -θ angle oblique yarn 62 at the top of the left web fabric area 21, and the other group consisting of the -θ angle oblique yarn 62 starting from the right side of the wing-plate yarn-separating fabric area 11 and the +θ angle oblique yarn 61 at the top of the right web fabric area 22; when the +θ angle oblique yarn 61 on the left side of the wing-plate yarn-separating fabric area 11 moves one step forward to the right, the -θ angle oblique yarn 62 at the top of the left web fabric area 21 moves... The yarn 62 moves downward and forward by one step. When the +θ angle oblique yarn 61 and the -θ angle oblique yarn 62 move to the root corner area of the T-shaped structure, they begin to move upward and forward and to the left and forward, respectively. Similarly, when the -θ angle oblique yarn 62 on the right side of the wing plate yarn-separating fabric area 11 moves to the left and forward by one step, the +θ angle oblique yarn 61 at the top of the right web fabric area 22 moves downward and forward by one step. When the -θ angle oblique yarn 62 and the +θ angle oblique yarn 61 move to the root corner area of the T-shaped structure, they begin to move upward and forward and to the right and forward, respectively.
[0061] S4, the introduction of weft yarn 5 in the T-shaped structure, specifically also includes:
[0062] S4-1, the introduction of weft yarn 5 into the straight fabric area 12 of the wing plate;
[0063] S4-2, the introduction of weft yarn 5 in the wing-plate splitting fabric area 11 and the web fabric area 2; when the weft yarn 5 moves from the wing-plate splitting fabric area 11 to the root corner area of the T-shaped structure, it is introduced vertically towards the web fabric area 2 with the direction of the warp yarn 4 as the normal, until the top of the web fabric area 2.
[0064] S5, Press the weft yarn 5; Press the weft yarn 5 towards the warp yarn 4 using the weft pressing device, and be careful to restrain the movement of the yarn in the root corner area of the T-shaped structure in the normal plane of the warp yarn 4.
[0065] The wing fabric area 1 and the web fabric area 2 can be designed with different fabric structures according to mechanical performance requirements, including different positions of each yarn layer, different numbers of yarn layers, and different angles θ of the oblique yarn 6.
[0066] The angle θ of the bias yarn 6 can be changed by altering the arrangement density of the connecting warp yarn 3, the inserting warp yarn 4, and the weft yarn 5, or by changing the coordination of the stepping motion of the bias yarn 6 and the introduction of the weft yarn 5, or by combining the two methods. Changing the coordination of the stepping motion of the bias yarn 6 and the introduction of the weft yarn 5 means increasing the angle θ of the bias yarn 6 by increasing the number of steps of the bias yarn 6's movement, or decreasing the number of times the weft yarn 5 is introduced.
[0067] It is worth noting that this embodiment only provides a T-shaped structure fabric containing oblique yarns, and the weaving method of the present invention is not limited to this embodiment. Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art, under the guidance of the present invention, can come up with other various embodiments without departing from the spirit and scope of the claims. All technical solutions formed by equivalent substitution or equivalent transformation should fall within the protection scope of the appended claims of the present invention.
Claims
1. A three-dimensional integral T-shaped structure fabric containing oblique yarns, characterized in that: It includes two parts: a wing board fabric area (1) and a belly board fabric area (2); wherein, the wing board fabric area (1) is divided into a wing board yarn splitting fabric area (11) and a wing board straight fabric area (12); the belly board fabric area (2) is divided into a left belly board fabric area (21) and a right belly board fabric area (22); the wing board yarn splitting fabric area (11) is connected to the belly board fabric area (2) by reserving yarns; both the wing board fabric area (1) and the belly board fabric area (2) contain bonding warp yarns (3), interlining warp yarns (4), weft yarns (5) and bias yarns (6); In the root corner area of the T-shaped structure, the direction of the warp yarn (4), weft yarn (5) and oblique yarn (6) is normal, wherein the weft yarn (5) and oblique yarn (6) are both turned vertically from the wing plate yarn splitting fabric area (11) to the web fabric area (2); the knotting warp yarn (3) binds the other yarns together in the wing plate fabric area (1) and the web fabric area (2) respectively.
2. The three-dimensional integral T-shaped structure fabric containing oblique yarns according to claim 1, characterized in that: The wing fabric area (1) and the web fabric area (2) are designed with fabric structures according to mechanical performance requirements. The fabric structure includes the position of each yarn layer, the number of yarn layers, and the angle θ of the bias yarn (6). The bias yarn (6) also includes a +θ angle bias yarn (61) and a -θ angle bias yarn (62). The +θ angle bias yarn (61) and the -θ angle bias yarn (62) are both set near the weft yarn (5).
3. The three-dimensional integral T-shaped structure fabric containing oblique yarns according to claim 2, characterized in that: The angle θ of the oblique yarn (6) ranges from 25° to 65°.
4. The three-dimensional integral T-shaped structure fabric containing oblique yarns according to claim 2, characterized in that: The +θ angle oblique yarn (61) is located near the outside of the T-shaped structure and is positioned between the connecting warp yarn (3) and the outer weft yarn (5); the -θ angle oblique yarn (62) is located in the middle of the T-shaped structure and is positioned between the connecting warp yarn (3) and the inner weft yarn (5); the +θ angle oblique yarn (61) and the -θ angle oblique yarn (62) are located in different planes and the spatial angle between them is 2θ.
5. A method for weaving a three-dimensional integral T-shaped structure fabric containing oblique yarns, used for weaving the three-dimensional integral T-shaped structure fabric according to any one of claims 2-4, characterized in that... This includes the following steps: S1, the initial yarn arrangement of the T-shaped structure; including: the initial arrangement of the connecting warp yarn (3), the lining warp yarn (4) and the bias yarn (6) in the wing fabric area (1) and the web fabric area (2) respectively; the initial arrangement of the edge yarns of the bias yarn (6) in the wing fabric area (1) and the web fabric area (2) respectively; S2, the opening movement of the connecting warp (3) in the T-shaped structure; wherein, the opening movement of the connecting warp (3) includes the opening movement in the wing fabric area (1) and the web fabric area (2), and the planes formed by the interlacing movement of the connecting warp (3) in the two areas are perpendicular to each other; the opening movement direction of the connecting warp (3) is parallel to the direction of the backing warp (4) in the T-shaped structure. S3, the movement of the oblique yarn (6) specifically includes: S3-1, the movement of the oblique yarn (6) in the straight fabric area (12) of the wing plate; S3-2, the movement of the oblique yarn (6) in the wing-plate yarn-separating fabric area (11) and the belly fabric area (2); wherein, the spindles of the oblique yarn (6) are divided into two groups, one group consisting of the +θ angle oblique yarn (61) starting from the left side of the wing-plate yarn-separating fabric area (11) and the -θ angle oblique yarn (62) at the top of the left belly fabric area (21), and the other group consisting of the -θ angle oblique yarn (62) starting from the right side of the wing-plate yarn-separating fabric area (11) and the +θ angle oblique yarn (61) at the top of the right belly fabric area (22); when the +θ angle oblique yarn (61) on the left side of the wing-plate yarn-separating fabric area (11) moves one step forward to the right, the top of the left belly fabric area (21) The -θ angle oblique yarn (62) at the end moves downward and forward by one step. When the +θ angle oblique yarn (61) and the -θ angle oblique yarn (62) move to the root corner area of the T-shaped structure, they start to move upward and forward and to the left and forward, respectively. Similarly, when the -θ angle oblique yarn (62) on the right side of the wing plate yarn-separating fabric area (11) moves to the left and forward by one step, the +θ angle oblique yarn (61) at the top of the right belly plate fabric area (22) moves downward and forward by one step. When the -θ angle oblique yarn (62) and the +θ angle oblique yarn (61) move to the root corner area of the T-shaped structure, they start to move upward and forward and to the right and forward, respectively. S4, the introduction of weft yarn (5) in the straight fabric area (12) of the wing plate, the yarn-splitting fabric area (11) of the wing plate and the fabric area (2) of the web plate in the T-shaped structure; S5, Press the weft yarn (5); Press the weft yarn (5) towards the warp yarn (4) using the weft pressing device, while restraining the movement of the yarn in the root corner area of the T-shaped structure in the normal plane of the warp yarn (4).
6. The weaving method of the three-dimensional integral T-shaped structure fabric containing oblique yarns according to claim 5, characterized in that: Specifically, S1 also includes: S1-1, the spindles of the connecting warp (3) are arranged on the guide strip of the connecting warp (3), and the spindles of the wing fabric area (1) and the web fabric area (2) are arranged in a T-shape vertical arrangement. S1-2, the initial arrangement of the edge yarns of the oblique yarn (6) in the straight fabric area (12) of the wing plate; S1-3, the initial arrangement of the edge yarns of the oblique yarn (6) in the wing-plate yarn-separating fabric area (11); there is an edge strip of oblique yarn (6) on the left and right edges of the wing-plate yarn-separating fabric area (11) and the top edge of the web fabric area (2); a +θ angle oblique yarn (61) is arranged on the spindle of the yarn on the left edge of the wing-plate fabric area (1); a -θ angle oblique yarn (62) is arranged on the spindle of the yarn on the right edge of the wing-plate fabric area (1); a -θ angle oblique yarn (62) and a +θ angle oblique yarn (61) are arranged on the spindle of the yarn on the top edge of the left web fabric area (21) and the right web fabric area (22), respectively, corresponding to the left and right edges of the wing-plate yarn-separating fabric area (11).
7. The weaving method of the three-dimensional integral T-shaped structure fabric containing oblique yarns according to claim 5, characterized in that: S4 specifically also includes: S4-1, introduction of weft yarn (5) into the straight fabric area (12) of the wing plate; S4-2, the introduction of weft yarn (5) in the wing section yarn fabric area (11) and the web fabric area (2); when the weft yarn (5) moves from the wing section yarn fabric area (11) to the root corner area of the T-shaped structure, it turns vertically towards the web fabric area (2) with the direction of the warp yarn (4) as the normal, and continues to be introduced until the top of the web fabric area (2).
8. The weaving method of the three-dimensional integral T-shaped structure fabric containing oblique yarns according to claim 5, characterized in that: The method to change the angle θ of the oblique yarn (6) is to change the arrangement density of the connecting warp yarn (3), the lining warp yarn (4) and the weft yarn (5), or to change the stepping motion of the oblique yarn (6) and the coordination of the introduced weft yarn (5), or to combine the two methods mentioned above.
9. The weaving method of a three-dimensional integral T-shaped structure fabric containing oblique yarns according to claim 8, characterized in that: The change in the stepping motion of the oblique yarn (6) and the coordination of the introduction of the weft yarn (5) refers to increasing the angle θ of the oblique yarn (6) by increasing the number of steps of the oblique yarn (6) or decreasing the number of times the weft yarn (5) is introduced.