Modeling method, storage medium and equipment for fully thermoplastic circular tubular honeycomb considering intercellular contact

Abstract

The invention relates to a modeling method, storage medium and device for a full thermoplastic circular tube honeycomb that considers the contact form between cells, and belongs to the field of composite material analysis technology. In order to solve the problem that the current numerical analysis model for thermoplastic circular tube honeycombs basically does not consider the contact relationship between cells and affects the simulation effect of thermoplastic circular tube honeycombs when processed according to line contact processing. The present invention uses three-dimensional modeling software to perform three-dimensional modeling on the honeycomb model structure. The honeycomb model is a sandwich structure, including a honeycomb core and panels on both sides of the honeycomb core. The honeycomb core is a honeycomb structure composed of tubular thermoplastic materials. The honeycomb core is modeled using shell units, and the upper and lower panels are modeled as rigid shells. A circular tube in the honeycomb structure is regarded as a cell, and the extrusion effect between cells is simulated by presetting the contact area between cells.

Description

Technical Field

[0001] The present invention belongs to the technical field of composite material analysis, and in particular relates to a full thermoplastic circular tube honeycomb modeling method and corresponding storage medium and equipment. Background Art

[0002] New honeycomb core materials and organic composite materials offer significant advantages in reducing weight, lowering costs, improving performance, and enhancing design flexibility, leading to widespread applications in the automotive and aerospace industries. The production and conversion processes for these products are highly automated, enabling rapid and efficient completion. Notably, when both the honeycomb core and skin are manufactured from the same thermoplastic polymer, they are also highly recyclable. Studies have shown that circular honeycomb structures outperform hexagonal and quadrilateral structures in terms of ballistic performance and energy absorption. Contact issues encountered in the study of circular tubular honeycombs remain a largely unexplored area of ​​research, particularly in finite element model analysis, which often fails to accurately account for the contact area between tubular cells. Specifically, simulation models only account for line contact, whereas actual honeycomb structures have bonded areas between the tubes, creating stronger constraints than line contact. Therefore, establishing an accurate computationally refined finite element model for thermoplastic circular tubular honeycombs that can simulate the contact area between cells is crucial for design and improving the overall performance of thermoplastic circular tubular honeycombs in automotive and aerospace applications.

[0003] Current numerical analysis models for thermoplastic circular honeycomb tubes generally fail to consider inter-cell contact relationships. Most models use line contact as the basis, with the cells being ideally circular. Simulation errors are attributed to the contact method. This is because actual cells are in direct surface contact, not strictly line contact. This is also due to process limitations, severely impacting the simulation results of thermoplastic circular honeycomb tubes. Summary of the Invention

[0004] The present invention aims to solve the problem that the current numerical analysis models for thermoplastic circular tube honeycombs basically do not consider the contact relationship between unit cells and affect the simulation effect of thermoplastic circular tube honeycombs when processing according to line contact.

[0005] A modeling method for a fully thermoplastic circular tube honeycomb considering the contact form between unit cells includes the following steps:

[0006] The honeycomb model structure was 3D modeled using 3D modeling software. The honeycomb model is a sandwich structure, including a honeycomb core and panels on both sides of the honeycomb core. The honeycomb core is a honeycomb structure composed of tubular thermoplastic material. The honeycomb core is modeled using shell units, and the upper and lower panels are modeled as rigid shells. A circular tube in the honeycomb structure is regarded as a unit cell, and the inter-cell extrusion effect is simulated by presetting the contact area between the units.

[0007] Furthermore, the value of the inter-cell squeezing effect is determined visually, and then the inter-cell squeezing effect is represented as a preset inter-cell contact area for three-dimensional modeling.

[0008] Furthermore, the contact area between the cells, which represents the squeezing effect between the cells, is represented and analyzed using the arc angle corresponding to the contact surface.

[0009] Furthermore, a modeling method of a fully thermoplastic circular tube honeycomb considering the contact form between unit cells further includes the following steps:

[0010] The three-dimensional model was exported to the finite element software, and after assigning material properties, meshing was performed and boundary conditions were applied. The finite element software solver was used to simulate the response of the honeycomb core and the entire sandwich structure under uniformly distributed compressive loads.

[0011] Furthermore, in the process of simulating the response of the honeycomb core and the entire sandwich structure under uniformly distributed compressive load using a finite element software solver, the contact surfaces between the unit cells are simulated by single-layer contact surfaces.

[0012] A computer storage medium stores at least one instruction, which is loaded and executed by a processor to implement a modeling method for a fully thermoplastic circular tube honeycomb that considers the contact form between unit cells.

[0013] A modeling device for a fully thermoplastic circular tubular honeycomb taking into account the contact form between unit cells, the device comprising a processor and a memory, the memory storing at least one instruction, the at least one instruction being loaded and executed by the processor to implement a modeling method for a fully thermoplastic circular tubular honeycomb taking into account the contact form between unit cells.

[0014] The beneficial effects of the present invention are:

[0015] The present invention is a method for modeling a fully thermoplastic circular tube honeycomb that takes into account the contact form between cells. This method can effectively simulate and calculate the contact relationship between thermoplastic honeycomb cells through finite element simulation. The present invention fully considers the actual contact relationship between cells and improves the line contact modeling between cells to surface contact modeling. The numerical calculation results are more accurate and reliable, which can effectively improve the simulation effect. At the same time, the present invention can simplify the tedious numerical modeling analysis process and improve the calculation efficiency. Therefore, the present invention can realize the control of relevant parameters of the industrial production preparation of thermoplastic honeycomb structures by using a precise modeling method. In comparison with the experimental results, the stiffness / strength simulation results obtained by the present invention are consistent with the experimental results and can be applied to the analysis of fully thermoplastic circular tube honeycombs in engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of honeycomb structure size parameters.

[0017] Figure 2 Schematic diagram of the contact situation between the cells of the circular honeycomb core considered for refined modeling.

[0018] Figure 3 Finite element model diagram of honeycomb core and sandwich structure.

[0019] Figure 4 This is a diagram showing the effect of the structure changing as the angle increases.

[0020] Figure 5 A partial schematic diagram of the bonding between adjacent cells in a honeycomb.

[0021] Figure 6 Schematic diagram of uniaxial loading direction (L direction, W direction, T direction).

[0022] Figure 7 Experimental and numerical stress-strain curves, where (a) is the L direction curve, (b) is the W direction curve, and (c) is the T direction curve.

[0023] Figure 8 Schematic diagram of the uniaxial compression deformation process of the honeycomb core in three directions.

[0024] Figure 9 SEA diagram in three directions.

[0025] Figure 10 Schematic diagram of the structure of the sandwich structure flat compression / shear test device.

[0026] Figure 11 Comparison results of experimental and simulated flat compression tests; (a) represents the plane compression stress-strain curve; (b) represents the progressive failure process of the thermoplastic composite honeycomb sandwich panel under compression load.

[0027] Figure 12 The figure shows the comparison of the experimental and simulated shear test results; (a) shows the stress-strain curve under shear load; (b) shows the gradual failure process of the thermoplastic composite honeycomb sandwich panel under shear load.

[0028] Figure 13 Comparison diagram of test and simulation results; (a) represents stiffness comparison, and (b) represents strength comparison.

[0029] Figure 14 The stress-strain curves of the honeycomb core under uniaxial compression in three directions corresponding to different contact angles; (a) is the L direction curve, (b) is the W direction curve, and (c) is the T direction curve.

[0030] Figure 15The SEA diagram of the honeycomb core obtained by numerical simulation for different contact angles.

[0031] Figure 16 The following diagram shows the changes in strength and stiffness of the contact surface corresponding to the central angle of 0° to 30°.

[0032] Figure 17 The deformation mode effect diagram of different center angles under the action of L direction load.

[0033] Figure 18 The deformation mode effect diagram of different center angles under the action of W direction load.

[0034] Figure 19 The deformation mode effect diagram of different center angles under T direction load.

[0035] Figure 20 Figure 2 is a stress-strain curve of a sandwich plate under two loading conditions; (a) represents the curve for out-of-plane compression, and (b) represents the curve for shear;

[0036] Figure 21 Rendering of the deformation mode of the sandwich panel under out-of-plane compression.

[0037] Figure 22 The deformation mode effect diagram of the sandwich panel under shear load.

[0038] Figure 23 Graph showing the variation of stiffness and strength with the central angle; (a) is the out-of-plane compressive stiffness, (b) is the out-of-plane compressive strength, (c) is the shear stiffness, and (d) is the shear strength. DETAILED DESCRIPTION

[0039] At present, the numerical analysis models for thermoplastic circular tube honeycombs basically do not consider the contact relationship between cells. Most of them are processed according to line contact, and the cells are all ideal circles. The errors in the simulation results are also attributed to the contact mode. Because the actual cells are directly in surface contact, line contact in the strict sense cannot be achieved, which is also due to the process. The present invention proposes a full thermoplastic circular tube honeycomb modeling method that takes into account the contact form between cells. It mainly adopts the method of changing the contact relationship between cells to establish the contact constraint boundary conditions between circular tube cells. This method gives an effective prediction of the correlation between load-bearing capacity and contact area, which can improve the accuracy of model analysis. The following is an explanation with reference to specific implementation methods. Specific implementation method one:

[0041] This embodiment is a full thermoplastic circular tube honeycomb modeling method considering the contact form between unit cells, and the method includes the following steps:

[0042] The honeycomb model structure is 3D modeled using 3D modeling software. The honeycomb model is a sandwich structure, which includes a honeycomb core and panels on both sides of the honeycomb core. The honeycomb core is a honeycomb structure composed of a tubular thermoplastic material, such as Figure 1 As shown, the main geometric parameters include the honeycomb wall thickness ( Figure 1 t in c ), honeycomb thickness ( Figure 1 t in), tube radius ( Figure 1 R in), panel thickness ( Figure 1 t in f ); the honeycomb core is modeled using shell elements, while the upper and lower panels are modeled as rigid shells; a circular tube in the honeycomb structure is regarded as a unit cell, and the extrusion effect between the units is considered. The value is determined visually (such as Figure 3 As shown on the left), the inter-cell extrusion effect is simulated by presetting the inter-cell contact area. The schematic diagram of the inter-cell contact of the circular tube honeycomb core considered in the refined modeling is as follows Figure 2 As shown in Figure 1, the contact between the cells changes from linear contact to surface contact, and then to surface contact + extrusion deformation (the surface contact center angle = 60°, at this moment it is a hexagonal honeycomb). Considering the adhesion area between two adjacent unit cells that appear during the manufacturing process, as shown in Figure 1, Figure 5 As shown in the figure, this is due to the actual manufacturing process, which results in the formation of surface constraints between structural cells that are stronger than simple line constraints. This was then verified through subsequent experiments. The 3D model was exported to Abaqus software, and after assigning material properties, meshing was performed and boundary conditions were applied. The Abaqus / Explicit solver was used to simulate the response of the honeycomb core and the entire sandwich structure under uniformly distributed compressive loads. The model is shown in the figure. Figure 3 As shown; the effect diagram of the structure change of the model as the angle increases is shown Figure 4 shown.

[0043] Since the contact surfaces between unit cells are not considered as bonded interactions in this work, these contact interfaces are simulated by a single layer. In the finite element model, the interactions between honeycomb cores are calculated by surface-to-surface contact, and the arc angles corresponding to the contact surfaces are analyzed by visual methods.

[0044] Compared with traditional modeling methods, the numerical modeling method of the present invention has the following advantages:

[0045] This invention fully considers the actual contact relationship between unit cells, improving the line contact modeling between unit cells to surface contact modeling, making the numerical calculation results more accurate and reliable. It also simplifies the cumbersome numerical modeling and analysis process, improving computational efficiency. Therefore, this invention can implement a precise modeling method to guide the control of relevant parameters in the industrial production of thermoplastic honeycomb structures. Specific implementation method two:

[0047] This embodiment is a computer storage medium, in which at least one instruction is stored. The at least one instruction is loaded and executed by a processor to implement the modeling method of a fully thermoplastic circular tube honeycomb considering the contact form between unit cells.

[0048] It should be understood that the instructions include computer program products, software, or computerized methods corresponding to any method described in the present invention; the instructions can be used to program a computer system or other electronic device. Computer storage media may include readable media on which instructions are stored, and may include but are not limited to magnetic storage media, optical storage media; magneto-optical storage media include read-only memory ROM, random access memory RAM, erasable programmable memory (e.g., EPROM and EEPROM) and flash memory layers, or other types of media suitable for storing electronic instructions. Specific implementation method three:

[0050] This embodiment is a modeling device for a fully thermoplastic circular tubular honeycomb that takes into account the contact form between unit cells. The device includes a processor and a memory. It should be understood that the device includes any device including a processor and a memory described in the present invention. The device may also include other units and modules that perform display, interaction, processing, control, and other functions through signals or instructions.

[0051] At least one instruction is stored in the memory, and the at least one instruction is loaded and executed by the processor to implement the modeling method of the full thermoplastic circular tube honeycomb considering the contact form between unit cells.

[0052] Those skilled in the art will appreciate that at least one instruction stored is a computer program product corresponding to the method or system. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and interpreted scripting language JavaScript, etc., as well as computer languages ​​based on secondary development, etc. The computer languages ​​based on secondary development include but are not limited to computer languages ​​corresponding to instructions that interact with three-dimensional model software, simulation software, etc.

[0053] The present application is described with reference to the flowcharts and / or block diagrams of the methods, systems, and computer program products according to the embodiments of the present application, and can also be used for corresponding devices. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0054] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0055] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0056] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0057] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

[0058] Example

[0059] The properties of PP thermoplastic materials were characterized using the Cowper-Symonds elastic-plastic model, which includes three key parameters: elastic modulus, yield stress, and elastic-plastic stage function. To account for the initial yield behavior, the Von-Mises yield criterion was applied, providing a robust framework for analyzing the material's response under varying loading conditions. The stress-deflection tensor S satisfies the following inequality:

[0060]

[0061] Where, is the initial yield stress.

[0062] If the above equation is not satisfied, the material begins to yield and enters a state of plastic deformation. The Cowper-Symonds model converts the yield stress Expressed as strain rate Function:

[0063]

[0064] in, is the yield stress under static tension, C and P are model parameters.

[0065] The constitutive equation of the material after yielding is:

[0066]

[0067] The mechanical properties of polypropylene are shown in Table 1.

[0068] Table 1 Material properties of PP

[0069]

[0070] The structure is quickly modeled using 3D modeling software, the contact area between cells is preset, and the value is determined visually; the 3D model is exported to Abaqus software, and the Abaqus / Explicit solver is used to simulate the response of the honeycomb core and the entire sandwich structure under uniformly distributed compression loads. The model is as follows Figure 3 The honeycomb core is modeled using shell elements, while the upper and lower panels are modeled as rigid shells; considering the adhesion area between two adjacent units that occurs during the manufacturing process, as shown in Figure 5As shown, this is due to the actual fabrication process, which results in surface constraints between the structural unit cells that are stronger than simple line constraints. Since the contact surfaces between the unit cells are not considered as bonded interactions in this work, these contact interfaces are simulated by a single layer. In the finite element model, the interaction between the honeycomb cores is calculated through surface-to-surface contact. The arc angle corresponding to the contact surface is analyzed using image recognition methods and is approximately 10°. A displacement load is applied to the upper surface, while a fixed boundary condition is used on the lower surface. The loading conditions are shown in Table 2.

[0071] Table 2 Load conditions

[0072]

[0073] Figure 6 The experimental setup is shown in Figure 1, which mainly focuses on the three directions of L, W, and T (i.e., the length, width, and height of the honeycomb model, i.e., Figure 1 The specimens were tested in the three directions (l, w, t). This embodiment analyzes the stress-strain curves, deformation modes and energy absorption of the honeycomb core in these three directions. The stress-strain curves corresponding to the three directions L, W, and T are shown in Figure 2. Figure 7 (a)-(c) of the experimental results are shown. The experimental results are in good agreement with the finite element analysis results. Under uniaxial compression load, the loading levels in the L and W directions are comparable, while the loading level in the T direction is significantly higher. In the three directions, the difference between the finite element results and the test results of stiffness and maximum load is within 10%. In the T direction, the stiffness (the slope of the linear part of the load-deformation curve) and the maximum load are almost 30 times that of the L and W directions. However, the load-displacement curves in the L and W directions transition relatively smoothly, while the T direction shows a significant load jump when reaching the peak load.

[0074] from Figure 8 It can be seen that the gradual collapse of the cell rows starting from both ends is the deformation mode in the L direction under the action of the load. When the specimen deforms in the W direction, the cells in the middle of the specimen collapse to form multiple shear bands. When loaded in the T direction, the deformation mode is characterized by axial destruction of the unit cell tubes. Except for the destruction mode in the T direction, the finite element model accurately represents these deformation modes. Due to the loading in the T direction, the structure is destroyed. This damage is not taken into account in the finite element model, resulting in an inability to accurately simulate the experiment. Therefore, this causes the load-deformation curve to slightly exceed the experimental results. Figure 9 It can be seen that the specific energy absorption (SEA) value is highest in the T direction and slightly higher in the W direction relative to the L direction.

[0075] Schematic loading direction of the sandwich panel structure test fixture and the specimen to be tested Figure 10 shown.

[0076] In the out-of-plane compression test, the peak strains of the three specimens are 3.837%, 3.607%, and 3.621%, respectively, and the average peak load is 1.6 MPa, which is very close to the simulated value of 1.59 MPa. Figure 11 As shown in (a) in . Similarly, Figure 11 As shown in (b), the deformation modes of the experiment and simulation are in good agreement. In both cases, plastic buckling occurs locally and gradually expands with the increase of deformation. In the shear test, the curves of the three specimens reach peak values ​​at strains of 10.588%, 10.938% and 10.189%, respectively, with an average load of 0.52 MPa, which is very consistent with the simulated value of 0.50 MPa. Figure 12 The deformation patterns observed in the experiment and simulation are also highly consistent. After reaching the peak load, the out-of-plane compression and in-plane shear stress-strain curves in the simulation are higher than the experimental values. The stiffness and strength results of the test, simulation and theory are shown in Figure 2. Figure 13 As shown, good agreement among the three datasets was shown.

[0077] Exploring the contact interactions between unit cells is crucial for accurate numerical simulations. When the contact area transitions from lines to surfaces, the contact interactions are enhanced. Figure 16 The changes in strength and stiffness of the contact surface corresponding to the central angle of 0° to 30° are given.

[0078] The uniaxial compressive stress-strain curves of the honeycomb core in three main directions are shown in Figure 2. Figure 14 It is worth noting that there seems to be no clear pattern between the peak or platform load of the curve and the central angle corresponding to the contact segment. This inconsistency may be caused by the different boundary conditions of the specimen structure. In addition, the weak constraint imposed by the uniaxial compression test of the honeycomb core exacerbates the uncertainty of the deformation. This conjecture is Figure 17-Figure 19 The deformation patterns shown are supported in Fig.

[0079] Figure 15 The SEA corresponding to the three main directions is shown. Figure 17 The deformation in the L direction. When the central angle is 0°, the structure begins to deform, and the deformation begins to accumulate from the lower section, and the stress-strain curve shows an obvious peak load. When the central angle is 10° and 20°, the minimum deformation at the bottom gradually develops into an accumulation deformation that diffuses upward. When the central angle is 30°, the structure deforms from the top and diffuses downward. When the strain reaches 0.6, the deformation remains uniform throughout the compaction process. The W direction loading deformation diagram is shown in the figure below. Figure 18As shown in Figure 3, at a central angle of 0°, the structure first deforms uniformly, then begins to deform in the center. This explains the significant jump in the stress-strain curve, likely due to a transition from global to local deformation. At central angles of 10°, 20°, and 30°, multiple shear bands form in the middle of the structure. Deformation then spreads in an irregular pattern along these shear bands until the structure is fully compacted. Figure 19 The deformation in the T direction is shown. Compared with the boundary conditions in the L and W directions, the boundary conditions in this case are relatively stable, and the deformation is more uniform. The structure collapses from one end, gradually expands, and finally compacts. As the contact area between cells increases, the jump in the stress-strain curve becomes smoother, improving the energy absorption capacity of the structure. Changing the contact area between cells can enhance energy absorption in the T direction, although the stress-strain curve loaded in this direction is not itself optimal for energy absorption.

[0080] The sandwich plate provides more consistent boundary conditions than a single honeycomb core, which is conducive to a comprehensive analysis of the relationship between the intercellular contact area and the structural load-bearing capacity. The stress-strain curves of the sandwich plate under out-of-plane compression and in-plane shear are obtained by finite element analysis. Figure 20 As shown in Figure 2, as the intercellular contact area increases, the peak load of the in-plane compression curve gradually decreases, the transition becomes smoother, the load in the smooth section increases, and the energy absorption capacity of the structure is enhanced. Similarly, this effect is also observed under shear loading. Figure 21 This is a simulated cloud diagram of the out-of-plane compression of a sandwich panel. Except for the central angle of 0°, the collapse occurs at the ends of the sample instead of at its center. Figure 22 The deformation patterns and corresponding Von-Mises stresses for different center angles under in-plane shear are shown. It is important to note that under both loads, the strain corresponding to the peak load increases gradually with increasing contact area. Figure 23 The variation of stiffness and strength with contact area for two loading conditions is shown. As the central angle increases, the stiffness and strength decrease for both out-of-plane compression and in-plane shear.

[0081] The above examples are merely illustrative of the calculation model and process of the present invention and are not intended to limit the embodiments of the present invention. Persons skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. This list of embodiments is not exhaustive; however, any obvious variations or modifications derived from the technical solution of the present invention remain within the scope of protection of the present invention.

Claims

1. A modeling method for a fully thermoplastic circular tube honeycomb considering the contact form between cells, characterized in that: The following steps are involved: A 3D modeling software was used to perform 3D modeling of a honeycomb model structure. The honeycomb model is a sandwich structure, comprising a honeycomb core and panels on both sides of the honeycomb core. The honeycomb core is a honeycomb structure composed of a circular tubular thermoplastic material. The honeycomb core is modeled using shell elements, and the upper and lower panels are modeled as rigid shells. A circular tube in the honeycomb structure is regarded as a unit cell, and the inter-cell extrusion effect is simulated by presetting the contact area between the units. The value of the inter-cell squeezing effect is determined visually, and then the inter-cell squeezing effect is expressed as a preset inter-cell contact area for three-dimensional modeling; The inter-cell contact area representing the inter-cell extrusion effect is represented and analyzed using the arc angle corresponding to the contact surface; The modeling method further comprises the following steps: The 3D model was exported to finite element software, and after assigning material properties, meshing was performed and boundary conditions were applied. The finite element software solver was used to simulate the response of the honeycomb core and the entire sandwich structure under uniformly distributed compressive loads. In the process of simulating the response of the honeycomb core and the entire sandwich structure under the uniformly distributed compressive load using the finite element software solver, the contact surfaces between the unit cells are simulated by single-layer contact surfaces.

2. A computer storage medium, characterized in that The storage medium stores at least one instruction, which is loaded and executed by the processor to implement the modeling method of the fully thermoplastic circular tube honeycomb considering the contact form between unit cells as claimed in claim 1.

3. A modeling device for a fully thermoplastic circular tube honeycomb taking into account the contact form between cells, characterized in that: The device includes a processor and a memory, wherein the memory stores at least one instruction, and the at least one instruction is loaded and executed by the processor to implement the modeling method of a fully thermoplastic circular tube honeycomb considering the contact form between unit cells as described in claim 1.

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