CN-122008584-A - Manufacturing method of high-strength and high-toughness super structure based on gradient bionic spiral construction

CN122008584ACN 122008584 ACN122008584 ACN 122008584ACN-122008584-A

Abstract

The method for manufacturing the high-strength and high-toughness super-structure based on the gradient bionic spiral construction constructs a composite super-structure with excellent mechanical properties through the synergistic effect of the gradient bionic spiral pavement design and the Z-pin anchoring technology, wherein the spiral angle is changed in a gradient manner in the gradient bionic spiral pavement, the Z-pin anchoring is used for forming a three-dimensional reinforced network by penetrating through a composite laminated plate, the interlayer strength and the shock resistance are obviously improved, the high-strength and high-toughness super-structure manufacturing is realized through an autoclave forming technology, the synergistic reinforcement of the gradient bionic spiral construction and the Z-pin anchoring effect is realized, and the prepared super-structure has high specific strength, high toughness and excellent layering resistance.

Inventors

WANG XIN
Qin Liutong
Dou Feilong
ZHANG PU
JI HAIBO
WANG PENGFEI
LI ZHEN
LI BINGYANG
GENG XINYU
LIU MENGYUE
FENG XIANGCHAO
LIN XIN
GAO MENGQI

Assignees

中国航天科技创新研究院

Dates

Publication Date: 20260512
Application Date: 20260310

Claims (10)

1. The manufacturing method of the high-strength and high-toughness super structure based on gradient bionic spiral construction is characterized by comprising the following steps of: designing a gradient bionic spiral pavement according to preset pavement information and spiral angle information; Performing gradient bionic spiral layering, and cutting and stacking the prepreg to obtain a laminated slab; z-pin anchoring implantation is carried out into the laminated slab; and (5) carrying out autoclave molding on the laminated slab after anchoring implantation to obtain the high-strength and high-toughness super structure.
2. The method for manufacturing the high-strength and high-toughness super structure based on gradient bionic spiral construction, which is characterized by comprising the following steps of: The design method of the gradient bionic spiral pavement comprises the following steps: determining the total number of layers of the layers in preset layer information, and an initial spiral angle and an angle gradient increment of spiral angle information; predicting the spiral angles of all layers, and taking the spiral angles as a spiral layering sequence according to a gradient change sequence; The calculation method of the spiral angle of each layer comprises the following steps: θ i =θ+ (i-1)αi = 1, 2, ..., n Wherein, the total number n of layers, the initial spiral angle theta and the angle gradient increment alpha, i are gradient bionic spiral layers; After the spiral layering is carried out according to the spiral layering sequence, the spiral angle of the gradient bionic spiral layering from the surface layer to the inner layer is gradually changed, and the fiber orientation is adjusted according to the load distribution gradient so as to optimize the stress transmission path.
3. The method for manufacturing the high-strength and high-toughness super structure based on gradient bionic spiral construction, which is characterized by comprising the following steps of: The method for cutting and stacking the prepreg comprises the following steps: Determining the fiber direction, performing unidirectional fiber prepreg cutting according to the gradient bionic spiral layering design, and stacking the unidirectional fiber prepregs layer by layer to form a laminated board blank; The cutting process adopts successive cutting to realize that the cutting angle of each layer corresponds to the spiral angle of each layer, and the prepreg after cutting is stacked layer by layer according to the design sequence to form a laminated plate blank.
4. The method for manufacturing the high-strength and high-toughness super structure based on gradient bionic spiral construction, which is characterized in that: the laminated mat maintains the prepreg flat during stacking to avoid wrinkling.
5. The method for manufacturing the high-strength and high-toughness super structure based on gradient bionic spiral construction, which is characterized in that: the laminated slab penetrates through the Z-pin to realize anchoring implantation, and the anchoring implantation method comprises the following steps: Marking Z-pin implantation positions on the surface of a laminated plate blank to form a regular array, vertically or obliquely implanting the Z-pins into the laminated plate blank through special implantation equipment, and penetrating the Z-pins through the whole thickness of the laminated plate blank to realize the anchoring of the laminated plate blank, wherein the Z-pin implantation density is adjusted according to performance requirements.
6. The method for manufacturing the high-strength and high-toughness super structure based on gradient bionic spiral construction, which is characterized in that: the method for autoclave molding of the laminated plate blank comprises the following steps: Setting molding process parameters including molding pressure, heating rate, temperature range and heat preservation time, putting the laminated slab implanted with the Z-pin into an autoclave for molding, carrying out heat preservation treatment after molding, and cooling at a preset rate after heat preservation is finished to finish solidification molding.
7. The method for manufacturing the high-strength and high-toughness super structure based on gradient bionic spiral construction, which is characterized by comprising the following steps of: In the design process of the gradient bionic spiral pavement, the initial spiral angle theta and the angle gradient increment alpha meet the constraint condition theta+ (n-1) alpha of the spiral angle gradient increment of less than or equal to 60 degrees.
8. The method for manufacturing the high-strength and high-toughness super structure based on gradient bionic spiral construction, which is characterized in that: The prepreg is one-way fiber prepreg, carbon fiber epoxy resin prepreg is adopted, preselection is realized by presetting the unit area mass and thickness of the prepreg before cutting, and the starting angle of cutting the one-way fiber prepreg is set to be 0 degrees.
9. The method for manufacturing the high-strength and high-toughness super structure based on gradient bionic spiral construction, which is characterized in that: The Z-pin material is selected from carbon fiber or glass fiber material, the diameter and the implantation density are determined before anchoring implantation, the Z-pin material is implanted at an inclination angle which is vertical to the implantation layout or within a preset range in the anchoring implantation process, and the Z-pin is ensured to penetrate through the laminated slab in the anchoring implantation process.
10. The method for manufacturing the high-strength and high-toughness super structure based on gradient bionic spiral construction, which is characterized in that: And after the preparation of the high-strength and high-toughness superstructure is finished, respectively carrying out strength and rigidity evaluation, and if the evaluation fails, adjusting the gradient bionic spiral layering design or cutting treatment or Z-pin anchoring implantation related parameters, and carrying out re-evaluation on the formed high-strength and high-toughness superstructure until the evaluation requirement is met.

Description

Manufacturing method of high-strength and high-toughness super structure based on gradient bionic spiral construction Technical Field The invention relates to a manufacturing method of a high-strength and high-toughness super structure based on gradient bionic spiral construction, and belongs to the technical field of composite material structure manufacturing. Background The composite material is widely applied in the field of high-end equipment due to the advantages of high specific strength, high specific rigidity and the like, but the traditional composite material laminated structure has inherent defects of low interlayer strength, poor shock resistance and the like, and the application of the composite material under high load and complex working conditions is limited. In the prior art, the performance of the composite material is improved by means of layer design optimization or three-dimensional enhancement, but the improvement effect of a single method is limited. For example, while conventional spiral layering can improve interlayer stress distribution, the uniform change of angle is insufficient in adaptability to gradient load, and Z-pin anchoring can enhance interlayer bonding, but lack of cooperative design with the layering structure, and maximum improvement of performance is difficult to achieve. Therefore, there is a need to develop a manufacturing method that synergistically works the design of a layered structure with three-dimensional reinforcement techniques to produce a composite superstructure with excellent overall properties. Disclosure of Invention The invention solves the technical problem that in the prior art, a preparation method for preparing a composite material superstructure is lacking, and provides a high-strength and high-toughness superstructure manufacturing method based on gradient bionic spiral construction. The invention solves the technical problems by the following technical proposal: the manufacturing method of the high-strength and high-toughness super structure based on gradient bionic spiral construction is characterized by comprising the following steps of: designing a gradient bionic spiral pavement according to preset pavement information and spiral angle information; Performing gradient bionic spiral layering, and cutting and stacking the prepreg to obtain a laminated slab; z-pin anchoring implantation is carried out into the laminated slab; and (5) carrying out autoclave molding on the laminated slab after anchoring implantation to obtain the high-strength and high-toughness super structure. The design method of the gradient bionic spiral pavement comprises the following steps: determining the total number of layers of the layers in preset layer information, and an initial spiral angle and an angle gradient increment of spiral angle information; predicting the spiral angles of all layers, and taking the spiral angles as a spiral layering sequence according to a gradient change sequence; The calculation method of the spiral angle of each layer comprises the following steps: θi=θ+ (i-1)αi = 1, 2, ..., n Wherein, the total number n of layers, the initial spiral angle theta and the angle gradient increment alpha, i are gradient bionic spiral layers; After the spiral layering is carried out according to the spiral layering sequence, the spiral angle of the gradient bionic spiral layering from the surface layer to the inner layer is gradually changed, and the fiber orientation is adjusted according to the load distribution gradient so as to optimize the stress transmission path. The method for cutting and stacking the prepreg comprises the following steps: Determining the fiber direction, performing unidirectional fiber prepreg cutting according to the gradient bionic spiral layering design, and stacking the unidirectional fiber prepregs layer by layer to form a laminated board blank; The cutting process adopts successive cutting to realize that the cutting angle of each layer corresponds to the spiral angle of each layer, and the prepreg after cutting is stacked layer by layer according to the design sequence to form a laminated plate blank. The laminated mat maintains the prepreg flat during stacking to avoid wrinkling. The laminated slab penetrates through the Z-pin to realize anchoring implantation, and the anchoring implantation method comprises the following steps: Marking Z-pin implantation positions on the surface of a laminated plate blank to form a regular array, vertically or obliquely implanting the Z-pins into the laminated plate blank through special implantation equipment, and penetrating the Z-pins through the whole thickness of the laminated plate blank to realize the anchoring of the laminated plate blank, wherein the Z-pin implantation density is adjusted according to performance requirements. The method for autoclave molding of the laminated plate blank comprises the following steps: Setting molding process parameters including molding pressu