CN114228190A - Continuous fiber reinforced composite part variable-thickness layering parameterization design method - Google Patents
Continuous fiber reinforced composite part variable-thickness layering parameterization design method Download PDFInfo
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- CN114228190A CN114228190A CN202111434644.8A CN202111434644A CN114228190A CN 114228190 A CN114228190 A CN 114228190A CN 202111434644 A CN202111434644 A CN 202111434644A CN 114228190 A CN114228190 A CN 114228190A
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- 238000013461 design Methods 0.000 title claims abstract description 50
- 239000003733 fiber-reinforced composite Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005192 partition Methods 0.000 claims abstract description 85
- 239000000463 material Substances 0.000 claims abstract description 29
- 238000013439 planning Methods 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 6
- 229920002748 Basalt fiber Polymers 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- 239000004917 carbon fiber Substances 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- 238000013316 zoning Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 40
- 238000005457 optimization Methods 0.000 description 9
- 239000002131 composite material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Chemical & Material Sciences (AREA)
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- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Road Paving Structures (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a parametric design method for variable-thickness layering of a continuous fiber reinforced composite part, which comprises the following steps of: planning a layering partition according to the loaded deformation characteristic of the part to be layered in the use working condition; determining an endpoint position parameter l of a partition boundary line and a shape parameter v of the partition boundary line; determining a ply quantity parameter n of each subarea according to the ply thickness of each subarea; determining a local shared ply partition parameter R of each ply; wherein, the partial shared layer partition parameter R is the condition of the partition which can be covered by the continuous layer at the same time; determining a laying angle theta of the shared paving layer; wherein θ is 0 °, 45 °, -45 °, or 90 °; and adopting a continuous fiber reinforced composite material, and layering the part to be layered according to an endpoint position parameter l, a shape parameter v, a layering number parameter n, a partition parameter R and a laying angle theta.
Description
Technical Field
The invention belongs to the technical field of continuous fiber reinforced composite material parts, and particularly relates to a variable-thickness layering parameterization design method of a continuous fiber reinforced composite material part.
Background
The fiber reinforced composite material has high specific strength and specific rigidity and good impact resistance and energy absorption. With the rapid development of carbon fiber, glass fiber and basalt fiber materials, the cost is continuously reduced, and the development of the rapid molding process of the fiber reinforced composite material, the fiber reinforced composite material is more and more widely applied in the engineering fields of automobiles, aerospace, wind power, sports goods and the like. Especially, the application prospect of the continuous fiber reinforced composite material is wider, and in order to fully utilize the designability of the continuous fiber reinforced composite material, a composite material part is usually designed to be provided with a plurality of subareas with different thicknesses. The layering design schemes of all the thickness partitions are different so as to meet different performance requirements on parts and realize the maximization of structural efficiency. Because the variable dimension of the variable thickness layering design is high and the forms are different, if the parametric design is not carried out on the variable thickness layering of the part, the automatic updating iteration is difficult to be carried out on the layering design variables of the part in different optimization tasks during the structure optimization design, the layering design of the part can only be manually modified according to the optimization calculation result of a certain optimization task, the modified layering design scheme is substituted into the structure model, and then the analysis calculation of the next optimization task is carried out, so that the optimization iteration time is greatly increased, the calculation efficiency is obviously reduced, and the interaction influence of each design variable on the structure performance cannot be comprehensively considered.
Disclosure of Invention
The invention aims to provide a variable-thickness layering parameterization design method for continuous fiber reinforced composite parts, wherein a layering scheme is obtained by designing l, v, n, R and theta 5 parameters, so that the design efficiency of a continuous fiber reinforced composite structure can be effectively improved, and the material utilization rate is improved.
The technical scheme provided by the invention is as follows:
a continuous fiber reinforced composite part variable thickness ply parameterization design method comprises the following steps:
planning a layering partition according to the loaded deformation characteristic of the part to be layered in the use working condition;
determining an endpoint position parameter l of a partition boundary line and a shape parameter v of the partition boundary line;
determining a ply quantity parameter n of each subarea according to the ply thickness of each subarea;
determining a local shared ply partition parameter R of each ply;
wherein, the partial shared layer partition parameter R is the condition of the partition which can be covered by the continuous layer at the same time;
determining a laying angle theta of the shared paving layer;
wherein θ is 0 °, 45 °, -45 °, or 90 °;
and adopting a continuous fiber reinforced composite material, and layering the part to be layered according to an endpoint position parameter l, a shape parameter v, a layering number parameter n, a partition parameter R and a laying angle theta.
Preferably, when the part to be layered is a plate type part, the part to be layered is subjected to low-order constraint modal analysis, a first-order elastic mode of the part to be layered is calculated according to the constraint state of the part, and a layering partition is planned according to the first-order elastic constraint modal mode of the part.
Preferably, the ply thickness for each ply section is determined in accordance with the part's vertical stiffness and first order elastic modal frequency requirements.
Preferably, the laying angle of each local shared ply is determined by taking the maximum value according to the vertical rigidity and the first-order elastic modal frequency of the part.
Preferably, when the part to be paved is a roof plate, the paving areas are 5, and comprise two symmetrical first areas, two symmetrical second areas and a third area;
the two first partitions are located on two longitudinal sides of the roof panel, and the two first partitions are the same in thickness; the two second partitions are positioned on two sides of the transverse direction of the roof panel, and the thicknesses of the two second partitions are the same; the third partition is located between the two first partitions and the two second partitions.
Preferably, the method for parametric design of variable thickness ply of continuous fiber reinforced composite material part further comprises: determining the thickness of the first partition, the thickness of the second partition and the thickness of the third partition according to the vertical rigidity of the roof panel and the requirement of first-order elastic modal frequency;
the vertical rigidity of the car roof plate is 247.5N/mm, when the first-order elastic modal frequency is 133.7Hz, the thickness of the first partition is 2.4mm, the thickness of the second partition is 1.8mm, and the thickness of the third partition is 1.2 mm.
Preferably, when the part to be paved is a roof panel, the local shared paving partition parameter R includes 7 cases:
the first case is where the partially shared ply covers the first partition alone;
the second case is where the partially shared ply covers the second partition alone;
the third case is that the local shared ply covers the third partition alone;
a fourth case where the partially shared layup covers both the two first subdivisions and the two second subdivisions;
a fifth case where the partially shared layup covers both the first two divisions and the third division;
a sixth case where the partially shared layup covers both the two second subdivisions and the third subdivision;
a seventh case is where the partially shared layup covers the two first partitions, the two second partitions, and the third partition simultaneously.
Preferably, the fiber component of the continuous fiber reinforced composite material is one or more of carbon fiber, glass fiber and basalt fiber.
The invention has the beneficial effects that:
the variable-thickness layering parameterization design method for the continuous fiber reinforced composite material part, provided by the invention, realizes the parameterization design of each partition position, size, shape, layering quantity, laying angle, layering sequence and layering loss position of the continuous fiber reinforced composite material part with any size by designing l, v, n, R and theta 5 parameters; thereby establishing a full-parametric model of the continuous fiber reinforced composite material part and realizing the automatic modification of the variable-thickness layering parameters of the part in the iterative calculation of the optimized design; the method can effectively improve the design efficiency of the continuous fiber reinforced composite structure, comprehensively considers the interaction influence of different layering design variables on the structural performance, improves the material utilization rate, reduces the material cost of parts, and improves the light weight effect of the parts.
Drawings
FIG. 1 is a schematic diagram showing the number and position relationship of the floor covering zones in the embodiment of the invention.
FIG. 2 is a schematic diagram illustrating the influence of parameters l and v on the shape, position and size of a mat section in an embodiment of the present invention.
FIG. 3 is a schematic diagram of a parameterization design of a ply section in an embodiment of the invention.
FIG. 4 is a schematic diagram of values of a local shared layering parameter R and corresponding coverage areas in an embodiment of the present disclosure.
FIG. 5 is a schematic diagram illustrating parametric design results of a variable thickness ply of a roof panel according to an embodiment of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
The invention provides a parametric design method for variable-thickness layering of a continuous fiber reinforced composite part, which comprises the following specific processes:
the quantity and the position relation of variable-thickness paving subareas of parts are planned according to the loaded deformation characteristics of the parts to be paved in the using working condition, for example, the subareas can be planned according to the low-order mode vibration modes of the parts such as a roof plate, a floor and the like, the subareas can be planned according to the bending rigidity of the parts such as a roof beam, a floor beam and the like, and the subareas can be planned according to the maximum invasion amount requirements of different positions of the parts such as a B column, a doorsill beam and the like. Determining an endpoint position parameter l of a partition boundary line and a shape parameter v of the partition boundary line; determining a ply quantity parameter n of each subarea according to the ply thickness of each subarea; determining a local shared ply partition parameter R of each ply; wherein, the partial shared layer partition parameter R is the condition of the partition which can be covered by the continuous layer at the same time; determining a laying angle theta of the shared paving layer; wherein θ is 0 °, 45 °, -45 °, or 90 °; and adopting a continuous fiber reinforced composite material, and layering the part to be layered according to an endpoint position parameter l, a shape parameter v, a layering number parameter n, a partition parameter R and a laying angle theta.
In another embodiment, the ply thickness for each ply section is determined based on the vertical stiffness and first order elastic modal frequency requirements of the part.
In another embodiment, the angle of lay of each local shared layup is determined by taking the maximum value of the vertical stiffness and the first order elastic modal frequency of the part.
The fiber component of the continuous fiber reinforced composite material can be carbon fiber, glass fiber, basalt fiber or the mixture of the carbon fiber, the glass fiber and the basalt fiber according to a certain proportion to form the fiber reinforced composite material.
The parametric design method for the variable-thickness ply of the continuous fiber reinforced composite part provided by the invention is further explained by combining the specific embodiment as follows:
examples
(1) Firstly, planning the number and the position relation of the variable-thickness layering subareas of the parts according to the loaded deformation characteristics and the performance requirements of the roof plate. The roof plate has large area and low rigidity, and the main low-order constraint modal characteristics of the roof plate have important influence on the vibration and Noise Vibration (NVH) performance in the car, so the design requirement of the roof plate is that the rigidity of the roof plate is maximum and the first-order constraint modal amplitude is minimum through the variable-thickness layering design under the condition of constraining the weight of the roof plate. Therefore, the present embodiment first performs a low-order constrained modal analysis on the roof panel. And according to the connection constraint state of the roof plate with the side wall, the front air window and the rear air window in the use working condition, the translation and rotation freedom degree of the periphery of the roof plate is constrained to calculate a first-order elastic mode, and then a layer partition of the roof plate is planned according to the first-order elastic constraint mode vibration mode of the roof plate. Considering that the thickness distribution of the roof plate is symmetrical about the vertical plane in the vehicle body, the roof plate is divided into five regions according to the symmetry of the mode vibration mode, and the five regions comprise two symmetrical first regions (regions 1), two symmetrical second regions (regions 2) and a third region (region 3); the two first partitions are located on two longitudinal sides of the roof panel, and the two first partitions are the same in thickness; the two second partitions are positioned on two sides of the transverse direction of the roof panel, and the thicknesses of the two second partitions are the same; the third partition is located between the two first partitions and the two second partitions. The specific partitioning results are shown in fig. 1.
(2) Parameters l and v are used to define the position, size and shape of the roof panel ply section. The roof panel includes three boundary zones, the curves AB, CD and EF are shown in FIG. 2. Respectively using l1，l2，l3，l4，l5，l6To define the location of the boundary line end point A, B, C, D, E, F; using the projection of the vector of the tangent direction at the end of the curve in the x and y directions (v)1，v2，v3，v4，v5，v6) To define the shape of the curves AB, CD and EF. Wherein the shape of curve AB is defined by vector v1And v2Control, the shape of the curve CD is defined by the vector v3And v4Control, the shape of curve EF being defined by vector v5And v6And (5) controlling.
Giving the parameter l ═ l1，l2，l3，l4，l5，l6) And v ═ v (v)1，v2，v3，v4，v5，v6) The position, shape and size of each layer partition of the vehicle roof plate can be defined by assigning specific numerical values. In this embodiment,/1～l6Are respectively 400, 600, 350, 550, 285, and v1～v6The values of (a) are 0, 0.2, 0.5 and 0.5 respectively, and the positions, sizes and shapes of the partitions of the roof panel are shown in fig. 3.
(3) And defining the number of layers, the laying angle, the layer sequence and the layer loss position of each section of the vehicle roof plate by using the parameters n, R and theta. The layering quantity parameter n is calculated by dividing the plate thickness of each subarea by the single-layer thickness of the continuous fiber composite material unidirectional belt. For the embodiment, the thickness of each partition is determined according to the requirements of 247.5N/mm of vertical rigidity and 133.7Hz of first-order elastic modal frequency of the roof plate, the thickness of the partition 1 is 2.4mm, the thickness of the partition 2 is 1.8mm, the thickness of the partition 3 is 1.2mm, and the thickness of the continuous fiber composite unidirectional tape is single-layerThe degree is 0.3mm, so that the number of layers in each subarea is calculated, wherein the subarea 1 is 8 layers, the subarea 2 is 6 layers, and the subarea 3 is 4 layers. The variable level of the parameter R enumerates all possible coverage areas of the local shared mat, and the variable level of the parameter R of the local shared mat coverage area is 7 (namely R comprises 7 cases, R is used for R respectively1～R7Representation) comprising a partially shared ply (R) covering only one zone1、R2、R3) Partially shared layers (R) covering two zones4、R5、R6) And a global layer (R) covering three zones7) As shown in FIG. 4, the first case R1 is where the partially shared ply individually covers the first section; the second case R2 is where the partially shared ply individually covers the second section; a third case R3 is where the partially shared ply covers the third section alone; a fourth case R4 is where the partially shared ply covers both the two first subdivisions and the two second subdivisions; a fifth case R5 is where the partially shared ply covers both the first two divisions and the third division; a sixth case R6 is where the partially shared ply covers both the second two divisions and the third division; a seventh case R7 is where the partially shared ply covers both of the two first sections, the two second sections, and the third section.
For this embodiment, based on the requirements of the structure performance of the roof panel and the molding process, the local shared ply is set to include four possible ply angles, that is, the variable level of the parameter θ includes 0 °, 45 °, -45 °, 90 °, and the value of the specific ply angle of each local shared ply is determined according to the ply design principle of the continuous fiber composite material part and the maximum values of the vertical stiffness and the first-order elastic modal frequency of the roof panel.
By giving specific values to three sets of parameters n, R and theta, a design scheme for the layer of each section of the roof panel thickness-variable layer can be obtained, for example, when n is 8 (the maximum layer thickness is 8 layers), and the parameter R (represented by the case) of each layer is R7、R1、R4、R7、R4、R1、R7，R7；θ1～θnThe values of the two are respectively-45 degrees, 0 degrees, -45 degrees, 90 degrees, 45 degrees, 0 degrees, 45 degrees and 0 degrees. The number of layers in the vehicle roof section 1 is 8, and the layer sequence is [ -45 °/0 °/45 °/90 °/45 °/0 ° ]](ii) a The number of layers in the subarea 2 is 6, and the sequence of the layers is [ -45 °/45 °/90 °/45 °/45 °/0 ° ]](ii) a The number of the layers of the subarea 3 is 4, and the sequence of the layers is [ -45 °/90 °/45 °/0 ° ]]Thus, a parametric design scheme for the variable thickness ply of the roof panel is obtained as shown in FIG. 5.
According to the invention, the position, size and shape of each subarea can be flexibly controlled through the boundary line endpoint position l and the boundary line shape v of the subarea, so that the variable-thickness paving layer area can be flexibly controlled, and the diversified design of the paving layer shape can be realized. The number of the layering of each subarea can be flexibly controlled through the number n of the local sharing layering and the area R covered by each local sharing layering; design variables for the number of the layers do not need to be independently set for each subarea, and complexity of the variable-thickness layer design is effectively reduced. Through the region R covered by each local sharing laying layer and the laying angle theta of each local sharing laying layer, the laying sequence and the position of the laying layer lost of each subarea can be flexibly controlled, the continuity of the laying layer between adjacent subareas can be reasonably planned, and the laying angle design variable does not need to be independently set for each laying layer of each subarea, so that the number of the design variables is greatly reduced, the laying layer design efficiency is improved, and the continuity of the variable-thickness laying layer transition and the structural integrity of the continuous fiber reinforced composite material part are effectively ensured.
The variable-thickness layering parameterization design method for the continuous fiber reinforced composite material part, provided by the invention, is used for carrying out parameterization description on design variables of the continuous fiber reinforced composite material part, realizing layering parameterization design of the part, and then carrying out value selection on the position, the size, the shape, the layering quantity, the layering angle, the stacking sequence and the missing layer position of each variable-thickness layering partition according to the performance requirements on the rigidity, the strength, the mode, the fatigue and the like of the part. The method can provide a new method for parametric modeling of the continuous fiber reinforced composite material part, and can be combined with an optimization algorithm to realize variable-thickness parametric optimization design of the continuous fiber reinforced composite material part, thereby having important theoretical significance and engineering application value.
The method can give full play to the design potential of the continuous fiber reinforced composite material part, has obvious design efficiency advantage, provides a basis for the parametric modeling and parametric and structure optimization integrated design of the composite material part, and has wide application prospect in the structural design fields of aerospace, vehicle engineering and the like.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (8)
1. A parametric design method for variable-thickness layering of continuous fiber reinforced composite parts is characterized by comprising the following steps:
planning a layering partition according to the loaded deformation characteristic of the part to be layered in the use working condition;
determining an endpoint position parameter l of a partition boundary line and a shape parameter v of the partition boundary line;
determining a ply quantity parameter n of each subarea according to the ply thickness of each subarea;
determining a local shared ply partition parameter R of each ply;
wherein, the partial shared layer partition parameter R is the condition of the partition which can be covered by the continuous layer at the same time;
determining a laying angle theta of the shared paving layer;
wherein θ is 0 °, 45 °, -45 °, or 90 °;
and adopting a continuous fiber reinforced composite material, and layering the part to be layered according to an endpoint position parameter l, a shape parameter v, a layering number parameter n, a partition parameter R and a laying angle theta.
2. The continuous fiber reinforced composite part variable-thickness ply parameterization design method according to claim 1, characterized in that when the part to be layered is a plate type part, the part to be layered is subjected to low-order constraint mode analysis, a first-order elastic mode of the part is calculated according to a constraint state of the part, and ply zoning is planned according to the first-order elastic constraint mode of the part.
3. The continuous fiber reinforced composite part variable thickness ply parametric design method of claim 2, wherein the ply thickness of each ply section is determined according to the part vertical stiffness and first order elastic modal frequency requirements.
4. The parametric design method for the variable-thickness ply of the continuous fiber reinforced composite part as recited in claim 3, wherein the laying angle of each local shared ply is determined by taking the maximum value according to the vertical stiffness and the first-order elastic modal frequency of the part.
5. The parametric design method for the variable-thickness paving of the continuous fiber reinforced composite material part as claimed in claim 3 or 4, wherein when the part to be paved is a roof panel, the paving area is 5, comprising two symmetrical first subareas, two symmetrical second subareas and a third subarea;
the two first partitions are located on two longitudinal sides of the roof panel, and the two first partitions are the same in thickness; the two second partitions are positioned on two sides of the transverse direction of the roof panel, and the thicknesses of the two second partitions are the same; the third partition is located between the two first partitions and the two second partitions.
6. The method of parametric design of a variable thickness ply of a continuous fiber reinforced composite part of claim 5, further comprising: determining the thickness of the first partition, the thickness of the second partition and the thickness of the third partition according to the vertical rigidity of the roof panel and the requirement of first-order elastic modal frequency;
the vertical rigidity of the car roof plate is 247.5N/mm, when the first-order elastic modal frequency is 133.7Hz, the thickness of the first partition is 2.4mm, the thickness of the second partition is 1.8mm, and the thickness of the third partition is 1.2 mm.
7. The method of claim 6, wherein when the part to be layered is a roof panel, the partial shared layer partition parameter R includes 7 cases:
the first case is where the partially shared ply covers the first partition alone;
the second case is where the partially shared ply covers the second partition alone;
the third case is that the local shared ply covers the third partition alone;
a fourth case where the partially shared layup covers both the two first subdivisions and the two second subdivisions;
a fifth case where the partially shared layup covers both the first two divisions and the third division;
a sixth case where the partially shared layup covers both the two second subdivisions and the third subdivision;
a seventh case is where the partially shared layup covers the two first partitions, the two second partitions, and the third partition simultaneously.
8. The method of claim 7, wherein the fiber component of the continuous fiber reinforced composite material is one or more of carbon fiber, glass fiber, and basalt fiber.
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