EP4062243A1

EP4062243A1 - Method for creating a virtual three-dimensional structural model

Info

Publication number: EP4062243A1
Application number: EP20811554.3A
Authority: EP
Inventors: David Marschall; Herbert Rippl
Original assignee: KTM Technologies GmbH
Current assignee: KTM Technologies GmbH
Priority date: 2019-11-19
Filing date: 2020-11-19
Publication date: 2022-09-28
Also published as: US20220405435A1; WO2021099451A1; DE102019135526A1; CN114667491A; JP2023501810A

Abstract

The invention relates to a method for creating a virtual three-dimensional structural model (19) of a body (5), said method comprising the following steps: determining an envelope geometry (25) and a basic volume (26) from a geometric model (16) of the body (5); creating at least one numerical model (18) of the body (5) taking into account the envelope geometry (25) and/or the basic volume (26); applying at least one variable (27) to the numerical model (18) and defining a target property (30) of the body (5) using the numerical model (18) to which the at least one variable (27) has been applied; creating a structural model (19) which defines an actual property (32) of the body (5); and iteratively optimising the structural model (19) to make the actual properties (32) equal to the target properties (30). According to the invention, during the iterative optimisation of the structural model (19), a mechanical, thermal and/or aerodynamic actual property (32) of the body (5) is adjusted to a mechanical, thermal and/or aerodynamic target property (30) of the body (5) by changing at least one parameter (11, 12, 13) of the structural model (19). The invention also relates to a production method and to a device which operates using this method.

Description

Method for creating a virtual three-dimensional

Structure model

The present invention relates to a method for creating a virtual three-dimensional structure model of a body. The invention also relates to an additive manufacturing method, in particular a 3D printing method, for manufacturing a body. The invention also relates to a device for creating a virtual three-dimensional structure model of a body and / or for manufacturing the body. The invention also relates to a body produced using this method.

For example, WO 2017/123268 A1 discloses a system and a method for generating a shape-conforming lattice structure for a part formed by additive manufacturing. The method includes creating a computer model of the part and creating a finite element mesh. A lattice structure with a multiplicity of cellular lattice components can also be created. Some of the network elements of the finite element network can be deformed so that the finite element network corresponds to the overall shape of the part. The lattice structure can then be deformed in such a way that the lattice structure has a cellular periodicity which corresponds to the finite elements of the finite element network.

The object of the present invention is to eliminate the disadvantages known from the prior art, in particular to improve the mechanical, thermal and / or aerodynamic properties of a body structure formed from a plurality of cells.

The object on which the invention is based is achieved by the features of the independent patent claims. Further advantageous refinements emerge from the subclaims and the drawings. A method is proposed for creating a virtual three-dimensional structure model of a body. The term “structure” is to be understood in particular as a lattice structure and / or surface structure. The structure can be formed from a multiplicity of cells. These cells can have several interconnected structural elements, in particular surface elements and / or grid elements.

In the method, a fill geometry and a base volume are first determined from a geometry model of the body. The geometry model can be a CAD model, for example. The filling geometry forms the envelope of the virtual body. The base volume forms the volume enclosed by the filling geometry. The base volume is accordingly at least partially framed by the filling geometry. This method step is preferably carried out at least partially manually by a user and / or in an automated manner by a computing unit.

Subsequently, in the method according to the invention, at least one numerical model of the body is created taking into account the filling geometry and / or the base volume. The numerical model can be an FE model (finite element model) and / or an FV model (finite volume model). This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit.

At least one variable is applied to the numerical model. The term “size” is essentially to be understood as an influencing and / or stress variable that acts on the body when it is used as intended. At least one mechanical, thermal and / or aerodynamic variable is applied to the numerical model. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit. A target property of the body is then determined on the basis of the numerical model to which the at least one variable is applied. This is preferably determined and / or specified by a user. Additionally or alternatively, this can be determined and / or specified in an automated manner by the computing unit. In the present case, a mechanical, thermal and / or aerodynamic target property of the body is determined on the basis of the numerical model to which the at least one mechanical, thermal and / or aerodynamic variable is applied. Here who the target properties of the body preferably mechanically, ther mix and / or aerodynamically set anisotropically. This means that the body preferably has direction-dependent mechanical, thermal and / or aerodynamic target properties. This process step is preferably carried out at least partially manually by the user and / or automatically by the computing unit.

Then a structure model is created. The term “structure model” is to be understood as a virtual model of the body that is made up of a large number of cells. The cells can be formed from several structural elements connected to one another, in particular surface elements and / or grid elements. The structure model defines at least one actual property of the body. The structure model defines a mechanical, thermal and / or aerodynamic actual property of the body. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the processing unit.

The numerical model and / or the structure model is preferably fitted into the envelope geometry. The term "fitted" means that a cell of the numerical model and / or the structure model adjoining the envelope geometry is not cut off or divided by the envelope geometry, but rather its dimensions precisely match the envelope geometry. are adjusted so that the cell is flush with the envelope geometry. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit.

In order to match the actual properties to the target properties, the structure model is iteratively optimized. Here, the at least one mechanical, thermal and / or aerodynamic actual property of the body is adapted to the mechanical, thermal and / or aerodynamic target property of the body by changing at least one parameter of the structure model. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit. In this way, a structure model can advantageously be created that is characterized by improved mechanical, thermal and / or aerodynamic properties.

It is advantageous if the structure model is created taking into account and / or on the basis of structural proportions of the numerical model. The term “structural proportions” means those parameters of a numerical network of the numerical model that define the proportions of the individual cells of the numerical network. The structural proportions can be, for example, the corner points of the numerical network of the numerical model, in particular their coordinates. The structure model is preferably created on the basis of these structural proportions of the numerical model. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit.

It is advantageous if the target property and / or the actual property is reflected by at least one property tensor, in particular a stiffness tensor. It is advantageous if the mechanical, thermal and / or aerodynamic actual properties of the structure model are determined using the numerical model. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit.

It is also advantageous if the changed mechanical, thermal and / or aerodynamic actual properties of the body are compared with the mechanical, thermal and / or aerodynamic target properties using the numerical model. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit.

In an advantageous development of the invention, the structure model is formed from a multiplicity of cells which have several interconnected structural elements, in particular surface elements and / or lattice elements. The grid elements can be rods, for example, which are preferably connected to one another at nodes.

In order to increase the degree of optimization of the structure model, it is advantageous if at least one structure element parameter of at least one, in particular individual, structure element, in particular a cell, is changed. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit. Accordingly, it is not the cell as a whole, but at least one, in particular individual, structural elements of the cell that are influenced and optimized one level of detail deeper. In this way, a cell can advantageously be created which has an optimized mechanically, thermodynamically and / or aerodynamically anisotropic behavior.

It is advantageous if the at least one, in particular individual, structural element is changed in such a way that it itself is mechanically, thermally and / or has aerodynamically anisotropic properties. In this way, the anisotropic behavior of the cell can advantageously be influenced and determined even more precisely. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the processing unit.

In this regard, it is advantageous if the at least one parameter, in particular special structural element parameters, is changed in a longitudinal direction and / or one of its two transverse directions of the structural element. Accordingly, the structural element can preferably be designed in such a way that its mechanical, thermal and / or aerodynamic properties change in at least one of its three spatial directions, in particular continuously or variably. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit.

It is advantageous if a material parameter and / or a geometry parameter of the structural element, in particular in one of its three spatial directions, is changed as the structural element parameter. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit. In this regard, it is advantageous if, as material parameters, a density, a hardness, a strength (in particular tensile strength and / or compressive strength), an elasticity, a ductility, a material damping, a thermal expansion, a thermal conductivity, a heat resistance, a specific heat capacity and / or a cold toughness of the structural element, in particular in one of its three spatial directions, is changed. Furthermore, it is advantageous in this regard if a thickness, a length, a cross-sectional shape and / or a contour of the structural element, in particular in one of its three spatial directions, is changed as the geometry parameter. In an advantageous development of the invention, the structural element is changed in such a way that it has a variable thickness, in particular over its length. Accordingly, the structural element, in particular a rod element, can taper and / or thicken in areas.

It is advantageous if at least one structural element, in particular one which influences the mechanical, thermal and / or aerodynamic properties, of at least two structural elements of the same cell is designed differently from one another. As a result, the mechanical, thermal and / or aerodynamic properties of the cell can be made anisotropic. Furthermore, this anisotropic behavior of the cell can be set very precisely. This process step is preferably carried out at least partially manually by the user and / or automatically by the computing unit.

The material properties of a material used in additive manufacturing can change as a result of changing temperature conditions during the manufacturing process. For example, the manufacturing space of an additive manufacturing device gradually heats up during additive manufacturing. As a result, the material used cools down faster at the beginning of the manufacturing process than at the end of the manufacturing process. Due to the different cooling times, the material properties of the starting material used for additive manufacturing can change. This in turn influences the mechanical, thermal and / or aerodynamic properties of the additively manufactured body. Because of this, it is advantageous if, during the iterative optimization of the structure model, at least one, in particular the at least one structural element parameter, an additive manufacturing parameter Manufacturing device is taken into account. In this regard, it is advantageous if the actual properties and / or desired properties of the body are adapted as a function of and / or taking into account this production parameter. This process step is preferably at least partially carried out manually by the user and / or automatically by the computing unit.

It is advantageous if a temperature distribution in the interior of a production area of the production device is taken into account as a production parameter. Additionally or alternatively, it is advantageous if a temperature change in the interior of the production space, in particular during the production of the body, is taken into account. The temperature distribution and / or temperature change can be determined empirically, for example.

In an advantageous development, at least one parameter of the structure model, in particular at least one structure element parameter of at least one individual structure element, is changed as a function of a manufacturing parameter. This ensures that the temperature conditions that change during the manufacturing process do not negatively affect the material properties of the manufactured body. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the processing unit.

It is advantageous if at least one of the aforementioned process steps, in particular the iterative optimization of the structure model, is carried out at least partially by the computing unit, which is preferably designed with an artificial intelligence.

An additive manufacturing method, in particular a 3D printing method, for manufacturing a body is also proposed. In this manufacturing process, a virtual three-dimensional structure model of the body is created. The method steps for creating the virtual three-dimensional structure model of the body are preferably carried out at least partially manually by a user and / or automatically by a computing unit. Furthermore, for an additive manufacturing process Direction based on the virtual three-dimensional structure model, production data is created. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit. The body is then manufactured with the additive manufacturing device based on the manufacturing data. According to the invention, the virtual three-dimensional structure model of the body is created with a method for creating a virtual three-dimensional structure model according to the preceding description, wherein the features mentioned can be present individually or in any combination.

Furthermore, a device for creating a virtual three-dimensional structure model of a body and / or for manufacturing the body is proposed. The device comprises a computing unit for creating the virtual three-dimensional structure model of the body. Additionally or alternatively, the device comprises an additive manufacturing device for manufacturing the body. The computing unit of the device is designed in such a way that it can be used to create the virtual three-dimensional structure model of the body using a method according to the preceding description, wherein the features mentioned can be present individually or in any combination and / or the methods mentioned steps are at least partially carried out manually by the user and / or automatically by the processing unit.

Also proposed is a body, in particular a component, with a structure that is formed from a multiplicity of cells, which has several structural elements connected to one another, in particular surface and / or grid elements. The body is produced using a method according to the preceding description, wherein the features mentioned can be present individually or in any desired cumulation and / or the method steps mentioned are carried out at least partially manually by the user and / or automatically by the processing unit. It is advantageous if the body has a carrier element with which the structure is positively and / or cohesively connected. The structure is preferably clipped to the carrier element in a form-fitting manner. Additionally or alternatively, the carrier element can be materially connected via a connection material which preferably consists of the same material as the carrier element and / or the structure.

Further advantages of the invention are described in the following Ausführungsbei play. It shows:

Figure 1 is a schematic representation of a device for creating a virtual three-dimensional structure model of a body and for manufacturing the body, Figure 2 is a single cell of a structure,

Figure 3 shows a single structural element of a cell and

FIG. 4 shows a flow chart for a method for creating a virtual three-dimensional structure model of a body, in particular with a computing unit, and / or for additive manufacturing of this body, in particular with an additive manufacturing device.

Figure 1 shows a computing unit 2 for creating a virtual three-dimensional structure model 19 of a body 5. The method of operation of the computing unit 2 is discussed in detail in the following description, particularly in FIG User and / or can be carried out automatically by the computing unit 2. Furthermore, FIG. 1 shows an additive manufacturing device 3 with which the body 5 can be manufactured in an additive manufacturing process. The manufacturing device 3 has a manufacturing space 8, in the interior of which the body 5 is Herge. For the lowering position of the body 5, the additive manufacturing device 3 has a manufacturing unit 4. The computing unit 2 and the additive manufacturing device 3 together form a device 1 for creating the virtual three-dimensional structure model 19 and for additive manufacturing of the body 5. The body 5 has a structure 6, only indicated in FIG. 1, which is formed from a multiplicity of cells 7.

One of these isolated cells 7 is shown as an example in FIG. Each of these cells 7 is formed from a plurality of structural elements 9 connected to one another. As shown in FIG. 2, the structural elements 9 can be grid elements. Alternatively, the structural elements 9 can also be designed as surface elements. The structural elements 9 can be connected via nodes 10, of which only one is provided with a reference symbol in FIG. 2 for reasons of clarity.

FIG. 3 shows a single structural element 9 of a cell 7. The present structural element 9 is designed in such a way that it has anisotropic properties. As a result, the structural element 9 has different properties depending on the direction. For this purpose, at least one structure element parameter 11 of the structure element 9 is changed. The structural element parameters 11 can be material parameters 12 and / or geometry parameters 13 (cf. FIG. 4). Material parameters 12 can be, for example, density, hardness, strength, elasticity, ductility, material damping, thermal expansion, thermal conductivity, heat resistance, specific heat capacity and / or cold toughness. For example, the structural element 9 can have different material parameters 12 in a first section 14 than in a second section 15. In this example, the material parameters 12 thus change in a transverse direction of the structural element 9. Alternatively, the structural element parameters 11 can, however, also change in a longitudinal direction of the structural element 9. So changes in that In the present exemplary embodiment, a geometry parameter 13. Geometry parameters 13 can be the thickness, length, cross-sectional shape and / o the contour of the structural element 9. As FIG. 3 shows, in the case of the present structural element 9, the thickness of the structural element 9 changes over its length.

FIG. 4 shows a flowchart for a manufacturing method for manufacturing the body 5. FIG. 4 also shows a method for creating a virtual three-dimensional structure model of the body 5. This method is carried out with the computing unit 2 shown in FIG. In this case, the method steps mentioned are preferably carried out at least partially manually by a user and / or in an automated manner by the computing unit 2. In particular, it can happen that the processing unit 2 is instructed on input data that must be entered by a user, which are then processed by the processing unit 2. The subsequent step of additive manufacturing is carried out with the additive manufacturing device 3 shown in FIG.

In the present method, manufacturing parameters 28 of the additive manufacturing device 3 are taken into account. These production parameters 28 can be a temperature distribution in the production space 8 of the production device 3. The production parameters can preferably be recorded via sensors and / or entered manually by the user. Furthermore, a temperature change in the interior of the production space 8 during the production process can be taken into account as production parameter 28. So there are different temperatures in the production space 8, which also change during the production process. For example, an area of the additively manufactured body 5 can cool down more quickly in one area of the production space 8 than in another area of the production space 8. Depending on the cooling process, the material properties of the body 5 change in order to take this influence of the production device 3 into account can, therefore a material data determination 17 is carried out. Here, in the context of test production and subsequent material testing, the influencing of the material properties as a function of the production parameters 28 of the production device 3 is determined empirically. These production-related material data 29 can also be and / or include limit values for material properties. The production-related material data 29 ascertained in the course of the material data determination 17 flow, as explained in detail below, at different points.

To create the virtual three-dimensional structure model 19 of the body 5, a geometry model 16 of the body 5 is first created. Using the geometry model 16, an envelope geometry 25 and a base volume 26 are determined. The envelope geometry 25 here forms the outer skin of the body 5. The base volume 26 is thus enclosed by the envelope geometry 25. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit 2.

A first numerical model 18 of the body 5 is then created. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit 2. When creating the numerical model 18, the previously determined envelope geometry 25 and / or the base volume 26 is taken into account. The numerical model 18 has a numerical network, which is preferably built from numerical elements and / or these interconnecting corner points. The numerical model 18, in particular its numerical network, is fitted into the envelope geometry 25. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit 2. As a result, the numerical network of the numerical model 18 does not protrude beyond the envelope geometry 25, but is fitted directly adjacent to it. The numeric cells located in the edge area of the numeric network are thus not cut off by the envelope geometry 25, but all completely dig and / or closed.

The numerical model 18 can be an FE model (finite element model) and / or an FV model (finite volume model). The numerical model 18 is acted upon with at least one size 27 and / or several sizes (load collective). This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit 2. These can be influencing variables that act on the body 5 when it is used as intended. The sizes 27 are preferably mechanical, thermal and / or aerodynamic sizes 27. In addition, the production parameters 28 can be taken into account in this step. This takes place via the production-related material data 29. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit 2. On the basis of the first numerical model 18, setpoint properties 30 of the body 5 are determined taking into account the applied variables 27 and / or production-related material data 29. This is preferably done manually on the basis of empirical values by a user. Alternatively, however, this can also be done fully automatically by the computing unit 2, which for this purpose can preferably have an artificial intelligence. The setpoint properties 30 are mechanical, thermal and / or aerodynamic setpoint properties 30. These mechanical, thermal and / or aerodynamic setpoint properties 30 thus form the reference values that the structure 6 of the body 5 to be determined has should.

The first numerical model 18 has structural proportions 33. The term “structural proportions” is to be understood as meaning those parameters of the first numerical network of the numerical model 18 which define the proportions of the individual cells of the numerical network. The structural proportions 33 can, for example, be the corner points of the the first numerical network of the numerical model 18, in particular its coordinates.

To determine the structure 6, a first structure model 19 is first created. This takes place on the basis of the structure proportions 33 of the numerical model 18. For this purpose, the structure proportions 33 are transferred to the first structure model 19. The structure model 19 is fitted into the envelope geometry 25 through the use of the structure proportions 33. Alternatively, the structure model 19 can be fitted into the envelope geometry 25 in this step. As a result, the structure of the structure model 19 does not protrude beyond the envelope geometry 25, but is fitted directly to it lying on it. The cells 7 located in the edge region of the structure are therefore not cut off by the envelope geometry 25, but rather are all complete and / or closed. The structure model 19 supplies at least one actual property tensor 31. This at least one actual property tensor 31 of the structure model 19 defines mechanical, thermal and / or aerodynamic actual properties 32 of the mathematical model. To check these actual properties 32, the at least one actual property tensor 31 of the structure model 19 is transferred to a second numerical model 20. The production-related material data 29 of the material data determination 17 can also be taken into account in this second numerical model 20. The above procedural steps are preferably carried out at least partially manually by the user and / or automatically by the computing unit 2.

A check then takes place as to whether the actual properties 32 of the structure model 19 or of the second numerical model 20 correspond to the previously defined target properties 30 of the first numerical model 18. This takes place within the framework of a target / actual comparison 21. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit 2. If the mechanical, thermal and / or aerodynamic actual properties 32 still deviate too strongly from the mechanical, thermal and / or aerodynamic target properties 30, an iterative optimization of the structure model 19 takes place. As part of this iterative optimization the actual properties 32 so often matched to the target properties 30 until they match sufficiently. This method step is preferably carried out at least partially manually by the user and / or automatically by the computing unit 2.

In order to change the actual properties 32, a parameter adjustment 22 takes place. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit 2. In this case, at least one parameter, in particular a structural element parameter 11, of the structure model 19 is changed. The term “structural element parameter” is to be understood as a parameter of an individual structural element 9. Accordingly, at least one structural element parameter 11 of at least one individual structural element 9 of a cell 7 is changed (see FIG. 2). Here, the structural element 9 can be changed, for example, as shown in FIG. The at least one individual structural element 9 is changed in such a way that it has mechanically, thermally and / or aerodynamically anisotropic properties. The at least one structural element parameter 11 can be designed to be variable in one spatial direction of the structural element 9. The structure parameter 11 can be a material parameter 12 and / or the one geometry parameter 13 of the structure element 9. As a result, the structure model 19 can accordingly have at least one cell 7 in which at least one structure element parameter 11 of at least two structure elements 9 of the same cell 7 are designed differently from one another.

The mechanical, thermal and / or aerodynamic properties of the adjusted by the changed structural element parameters 11 Structure models 19 are in turn transferred to the second numerical model 20 via the at least one actual property tensor 31. A new target / actual comparison 21 then takes place. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit 2.

If the actual properties 32 correspond sufficiently enough to the target properties 30, production data is generated 23. In this step, suitable production data are created for the additive manufacturing device 3. This method step is preferably carried out at least partially manually by the user and / or in an automated manner by the computing unit 2. When producing production data 23, the production-related material data 29 can also be taken into account. The result of this is precise positioning of the body 5 to be manufactured in the manufacturing space 8 of the manufacturing device 3. In the last step, the manufacturing 24 takes place in the manufacturing device 3.

The present invention is not limited to the illustrated and described exemplary embodiments. Modifications within the scope of the patent claims are just as possible as a combination of the features, even if these are shown and described in different exemplary embodiments.

Reference list

1. Device 2. Computing unit

3. Additive manufacturing device

4. Manufacturing unit

5. body

6. Structure 7. Cell

8. Manufacturing room

9. Structural element

10. Levels 11. Structure element parameters 12. Material parameters

13. Geometry parameters

14. first section

15. second section

16. Geometry model 17. Material data determination

18. first numerical model

19. Structure model

20. Second numerical model 21. Target / actual comparison 22. Parameter adjustment

23. Production data creation

24. Manufacturing

25. Fill geometry

26. Base volume 27. Size

28. Production parameters 29. Production-related material data

Claims

Patent claims

1. A method for creating a virtual three-dimensional structure model (19) of a body (5), comprising the following steps:

- Determination of an envelope geometry (25) and a base volume (26) from a geometry model (16) of the body (5);

- Creation of at least one numerical model (18) of the body (5) taking into account the envelope geometry (25) and / or the base volume (26);

- Applying at least one variable (27) to the numerical model (18) and determining a desired property (30) of the body (5) on the basis of the numerical model (18) applied to the least one variable (27);

- Creation of a structure model (19) which defines an actual property (32) of the body (5); and

- Iterative optimization of the structure model (19) to match the actual properties (32) to the target properties (30), characterized in that in the iterative optimization of the structure model (19) a mechanical, thermal and / or aerodynamic actual property (32) of the body (5) by changing at least one parameter (11, 12, 13) of the structure model (19) to a mechanical, thermal and / or aerodynamic target property (30) of the body pers (5).

2. The method according to the preceding claim, characterized in that the numerical model (18) and / or the structure model (19) are fitted into the envelope geometry (25).

3. The method according to one or more of the preceding claims, characterized in that the structure model (19) is created taking into account and / or on the basis of structure proportions (33) of the numerical model (18).

4. The method according to one or more of the preceding claims, characterized in that the structure model (19) from a large number of cells (7) is formed, which verbun several structural elements (9), in particular surface and / or Grid elements have.

5. The method according to one or more of the preceding claims, characterized in that at least one structural element parameter (11) of at least one individual structural element (9) is changed.

6. The method according to one or more of the preceding claims, characterized in that the at least one individual structure element (9) is changed in such a way that it has mechanically, thermally and / or aerodynamically anisotropic properties.

7. The method according to one or more of the preceding claims, characterized in that the at least one structural element parameter (11) is changed in a longitudinal and / or transverse direction of the structural element (9).

8. The method according to one or more of the preceding claims, characterized in that a material parameter (12) and / or geometry parameter (13) of the structural element (9) is changed as the structural element parameter (11).

9. The method according to one or more of the preceding claims, characterized in that as material parameters (12) a density, hardness, strength, elasticity, ductility, material damping, thermal expansion, thermal conductivity, high temperature strength, specific thermal capacity and / or cold toughness of the structural element ( 9) is changed.

10. The method according to one or more of the preceding claims, characterized in that a thickness, length, cross-sectional shape and / or contour of the structural element (9) is changed as the geometry parameter (13).

11. The method according to one or more of the preceding claims, characterized in that at least one structural element parameter (11) of at least two structural elements (9) of the same cell (7) is formed differently from one another.

12. The method according to one or more of the preceding claims, characterized in that at least one manufacturing parameter (28) of an additive manufacturing device (3) is taken into account in the iterative optimization of the structure model (19).

13. The method according to one or more of the preceding claims, characterized in that a temperature distribution inside a manufacturing space (8) of the manufacturing device (3) and / or a temperature change inside the manufacturing space (8) is taken into account as manufacturing parameters (28) .

14. The method according to one or more of the preceding claims, characterized in that at least one parameter of the structure

Model (19), in particular at least one structural element parameter (11) at least one individual structural element (9) is changed as a function of a manufacturing parameter (28).

15. The method according to one or more of the preceding claims, characterized in that at least one method step, in particular the iterative optimization of the structure model, is carried out by a computing unit (2) which is preferably designed with an artificial intelligence.

16. Additive manufacturing process, in particular 3D printing process, for manufacturing a body (5), comprising the following steps:

- Creation of a virtual three-dimensional structure model (19) of the body (5);

- Creation of manufacturing data for an additive manufacturing device (3) using the virtual three-dimensional structure model (19); and

- Manufacturing the body (5) with the additive manufacturing device (3) using the manufacturing data; characterized in that the virtual three-dimensional structure model (19) of the body (5) is created using a method according to one or more of the preceding claims.

17. Device (1) for creating a virtual three-dimensional structure model (19) of a body (5) and / or for manufacturing the body (5) with a computing unit (2) for creating the virtual three-dimensional structure model (19 ) of the body (5) and / or with an additive manufacturing device (3) for manufacturing the body (5), characterized in that the computing unit (2) is designed such that the virtual three-dimensional structure model (19) of the body (5) can be created according to a method according to one or more of the preceding claims.

18. Body (5), in particular component, with a structure (6) which is formed from a plurality of cells (7) which have several interconnected structural elements (9), in particular special surface and / or grid elements, thereby characterized in that the body (5) is manufactured according to a method according to one or more of the preceding claims.

19. Body according to the preceding claim, characterized in that the body has a carrier element with which the structure is positively and / or cohesively connected.