Method for the design and manufacture of composites having tunable physical properties

• US 10,558,199 B2
• Filed: 11/09/2018
• Issued: 02/11/2020
• Est. Priority Date: 02/13/2018
• Status: Active Grant

• Current Assignee: University of Central Florida Research Foundation Inc. (State University System of Florida)
• Original Assignee: University of Central Florida Research Foundation Inc. (State University System of Florida)
• Inventors: Fenoglietto, Fluvio Lobo, Stubbs, Jack
• Primary Examiner(s): Dunn, Darrin D
• Application Number:
  US16/186,119
• Publication Number:
  US 20190250587A1
• Time in Patent Office: 459 Days
• CPC Class Codes: B29C 64/393 for controlling or regulating additive manufacturing processes
• CPC Class Codes: B33Y 50/02 for controlling or regulating additive manufacturing processes
• CPC Class Codes: G05B 19/4099 Surface or curve machining, making 3D objects, e.g. desktop manufacturing
• CPC Class Codes: G05B 2219/35134 3-D cad-cam
• CPC Class Codes: G05B 2219/49007 Making, forming 3-D object, model, surface
• CPC Class Codes: G05B 2219/49013 Deposit layers, cured by scanning laser, stereo lithography SLA, prototyping
• CPC Class Codes: Y02P 80/40 Minimising material used in manufacturing processes
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

A method of designing and manufacturing a replica composite object based on an original object. The method identifies the structure and physical properties of an original object. Base materials, bodies, and structural templates, each of which includes associated physical properties, are utilized to generate a 3-dimensional model. The 3-dimensional model is discretized and tested to determine if the selected combination of base materials and bodies have physical properties that substantially equal the physical properties of the original object. If the physical properties do not equate, the 3-dimensional model is optimized by adjusting the combination of base materials, bodies, and structural templates. When the difference between the measured physical properties of the 3-dimensional model and the identified physical properties of the original object is less than a tolerance value, the method instructs an additive manufacturing system to generate a replica composite object based on the original object.

Claims

1. A method for the design and manufacture of a replica composite object based on an original object, the manufacture accomplished using additive manufacturing, the method comprising the steps of:

identifying one or more physical properties of an original object;

determining one or more physical properties of a plurality of base materials;

determining one or more physical properties of a plurality of bodies;

comparing the identified physical properties of the original object with the physical properties of the plurality of base materials and the physical properties of the plurality of bodies, and selecting at least one of the plurality of base materials and at least one of the plurality of bodies;

determining one or more desired anisotropic physical properties of the replica composite object based on the identified one or more physical properties of the original object, wherein the anisotropic physical properties exhibit orientation-dependent mechanical behavior;

dividing at least one unit of the replica composite object into a plurality of subunits, each of the plurality of subunits in the at least one unit including an identical set of the selected at least one of the plurality of base materials and at least one of the plurality of bodies, wherein a characteristic of an additive manufacturing system determines the number of the subunits;

measuring a virtual response of the replica composite object to a virtual stimulation, and comparing the measured virtual response to an observed physical response of the original object to a stimulation based on the virtual stimulation;

determining whether the virtual response differs from the physical response by more than a tolerance value;

based on a determination that the virtual response differs from the physical response by more than the tolerance value, optimizing the one or more desired anisotropic physical properties of the replica composite object by adjusting the selected at least one of the plurality of base materials and at least one of the plurality of bodies, the optimization step configured to be performed; and

based on a determination that the virtual response differs from the physical response by less than or equal to the tolerance value, instructing the additive manufacturing system to generate the replica composite object.

2. The method of claim 1, wherein the stimulation of the replica composite object is analyzed via a simulation selected from the group consisting of finite element analysis and smooth particle hydrodynamics.

3. The method of claim 1, wherein each of the plurality of bodies further comprises a volume and is defined by a boundary, each of the plurality of bodies being independently tunable to substantially equate the physical properties of the replica composite object with the physical properties of the original object.

4. The method of claim 1, further comprising a step of:

generating a 3-dimensional model of the replica composite object based on a structure of the original object, the replica composite object including the selected at least one of the plurality of base materials and at least one of the plurality of bodies.

5. The method of claim 4, wherein the 3-dimensional model of the replica composite object is subjected to the virtual stimulation to measure the virtual response of the replica composite object.

6. The method of claim 1, wherein the step of selecting at least one of the plurality of base materials further comprises:

selecting at least two of the plurality of base materials; and

combining the selected at least two of the plurality of base materials via material blending, thereby fine-tuning the physical properties of the replica composite object.

7. The method of claim 1, wherein:

each of the plurality of subunits has tunable dimensions.

8. The method of claim 1, further comprising a step of:

discretizing the at least one unit into a finite number of single or multi-dimensional elements, each element having one or more associated physical properties.

9. A method for the design and manufacture of a replica composite object based on an original object, the manufacture accomplished using additive manufacturing, the method comprising the steps of:

providing a database including a plurality of base materials and bodies, each of the plurality of base materials and bodies including an associated at least one physical property, each of the plurality of bodies encompassing a volume, defining a boundary, and being independently tunable;

identifying at least one physical property of an original object by subjecting the original object to a physical stimulus;

selecting at least one desired anisotropic physical property of a replica composite object based on the identified at least one physical property of the original object by selecting, from the database, at least one of the plurality of base materials and at least one of the plurality of bodies, wherein the at least one desired anisotropic physical property exhibits orientation-dependent mechanical behavior;

dividing at least one unit of the replica composite object into a plurality of subunits, each of the plurality of subunits in the at least one unit including an identical set of the selected at least one desired anisotropic physical property, wherein a characteristic of an additive manufacturing system determines the number of the subunits;

calculating the at least one desired anisotropic physical property of the replica composite object by subjecting the replica composite object to a virtual stimulus based on the physical stimulus;

comparing the at least one desired anisotropic physical property of the replica composite object with the identified at least one physical property of the original object, and determining whether the at least one desired anisotropic physical property of the replica composite object differs from the identified at least one physical property of the original object by more than a tolerance value;

based on a determination that the at least one desired anisotropic physical property of the replica composite object differs from the identified at least one physical property of the original object by more than the tolerance value, optimizing the at least one desired anisotropic physical property of the replica composite object by adjusting the selected at least one of the plurality of base materials or by tuning the selected at least one of the plurality of bodies by modifying the boundary thereof; and

based on a determination that the at least one desired anisotropic physical property of the replica composite object differs from the identified at least one physical property of the original object by less than or equal to the tolerance value instructing the additive manufacturing system to generate the replica composite object.

10. The method of claim 9, wherein the step of calculating the at least one desired physical property of the replica composite object further comprises:

performing a simulation to determine the virtual response of the replica composite object, the virtual response being utilized to compare the replica composite object to the original object, the simulation selected from the group consisting of finite element analysis and smooth particle hydrodynamics.

11. The method of claim 9, wherein:

an improvement to the characteristic of the additive manufacturing system yields a greater number of subunits and thereby greater accuracy of the replica composite object.

12. The method of claim 11, further comprising the step of:

discretizing the at least one unit into a finite number of single or multidimensional elements, each element having one or more associated physical properties.

13. The method of claim 9, wherein the at least one desired physical property is selected from the group consisting of a base material and a combination of a base material and a body.

14. The method of claim 9, wherein the optimization step further comprises the steps of:

selecting at least one of the plurality of base materials and at least one of the plurality of bodies; and

adjusting at least one of the volume and the boundary of at least one of the plurality of bodies, thereby adjusting the replica composite object to substantially match the original object.

15. A method of optimizing a replica composite object manufactured via additive manufacturing, the method comprising:

identifying a structure of an original object;

identifying a physical property of the original object by subjecting the original object to a physical stimulus;

selecting a base material and a body from a database containing a plurality of base materials and bodies, each base material and each body having at least one associated anisotropic physical property, each of the plurality of bodies encompassing a volume, defining a boundary, and being independently tunable, wherein the at least one associated anisotropic physical property exhibits orientation-dependent mechanical behavior;

generating a virtual replica composite object having a structure configured to substantially match the structure of the original object, and including the selected base material and body;

dividing at least one unit of the virtual replica object into a plurality of subunits, each of the plurality of subunits in the at least one unit including an identical set of the selected base material and body, wherein a characteristic of an additive manufacturing system determines the number of the subunits;

discretizing the at least one unit into a finite number of single or multidimensional elements, wherein each element contains the same selected base material and body;

calculating a physical property of the selected base material and body by subjecting one or more of the single or multidimensional elements to a virtual stimulus based on the physical stimulus;

comparing the calculated physical property of the at least one unit with the identified physical property of the original object, and determining whether the calculated physical property of the at least one unit differs from the identified physical property of the original object by more than a tolerance value;

based on a determination that the calculated physical property differs from the identified physical property of the original object by more than the tolerance value, optimizing the virtual replica composite object by adjusting the selected base material or by tuning the selected body by modifying the boundary thereof; and

based on a determination that the calculated physical property differs from the identified physical property of the original object by less than or equal to the tolerance value, instructing the additive manufacturing system to generate replica composite object based on the virtual replica composite object.

16. The method of claim 15, wherein the stimulation of the virtual replica composite object is analyzed via a simulation selected from the group consisting of finite element analysis and smooth particle hydrodynamics.

17. The method of claim 15, wherein:

an improvement to the characteristic of the additive manufacturing system yields a greater number of subunits and thereby greater accuracy of the virtual replica composite object.