Automated method to determine composite material constituent properties

• US 9,223,914 B2
• Filed: 09/17/2014
• Issued: 12/29/2015
• Est. Priority Date: 01/21/2010
• Status: Active Grant

• Current Assignee: Autodesk, Inc.
• Original Assignee: Autodesk, Inc.
• Inventors: Fertig, Ray, Nelson, Emmett, Robbins, Don
• Primary Examiner(s): ALHIJA, SAIF A
• Application Number:
  US14/489,321
• Publication Number:
  US 20150006134A1
• Time in Patent Office: 468 Days
• Field of Search: 703/2
• US Class Current: 1/1
• CPC Class Codes: G06F 2113/24 Sheet material
• CPC Class Codes: G06F 2113/26 Composites
• CPC Class Codes: G06F 30/23 using finite element methods [FEM] or finite difference methods [FDM]

Abstract

According to an aspect, a method includes: receiving, at a machine comprising a processor and a memory, composite material properties for a composite material to be simulated; receiving, at the machine, a composite microstructure for the composite material to be simulated; and obtaining, using the processor and the memory, a set of adjusted material properties for one or more constituents of the composite material, for use in simulating the composite material, by processing the composite material properties and the composite microstructure using fixed constituent property constraints.

Claims

1. A method comprising:

receiving, at a machine comprising a processor and a memory, composite material properties for a composite material to be simulated;

receiving, at the machine, a composite microstructure for the composite material to be simulated; and

obtaining, using the processor and the memory, a set of adjusted material properties for one or more constituents of the composite material, for use in simulating the composite material, by processing the composite material properties and the composite microstructure using fixed constituent property constraints;

wherein the fixed constituent property constraints apply across multiple users and multiple locations to provide consistency in predicted material behavior in multiple simulated states, and the multiple users cannot vary the fixed constituent property constraints across multiple simulations.

2. The method of claim 1, wherein the composite material properties comprise:

a modulus of elasticity in a first direction;

a modulus of elasticity in a second direction that is normal to the first direction;

a shear modulus in a plane defined by the first direction and the second direction; and

a Poisson ratio in the plane defined by the first direction and the second direction.

3. The method of claim 2, wherein the composite material properties comprise a coefficient of thermal expansion.

4. The method of claim 2, wherein the composite material properties comprise:

a modulus of elasticity in a third direction that is normal to both the first direction and the second direction;

a shear modulus in a plane defined by the first direction and the third direction;

a shear modulus in a plane defined by the second direction and the third direction;

a Poisson ratio in the plane defined by the first direction and the third direction; and

a Poisson ratio in the plane defined by the second direction and the third direction.

5. The method of claim 4, wherein the composite material properties comprise:

a coefficient of thermal expansion in the first direction;

a coefficient of thermal expansion in the second direction; and

a coefficient of thermal expansion in the third direction.

6. The method of claim 2, wherein the composite material comprises a fiber in matrix composite material.

7. The method of claim 6, wherein the composite material comprises a woven carbon fiber/polymer matrix composite material.

8. The method of claim 1, wherein obtaining the set of adjusted material properties comprises determining in situ properties of a selected portion of the constituents of the composite material.

9. A system comprising:

a processor;

a memory having instructions that cause the processor to (i) obtain composite material properties for a composite material to be simulated, (ii) obtain a composite microstructure for the composite material to be simulated, and (iii) obtain a set of adjusted material properties for one or more constituents of the composite material, for use in simulating the composite material, by processing the composite material properties and the composite microstructure using fixed constituent property constraints, wherein the fixed constituent property constraints apply across multiple users and multiple locations to provide consistency in predicted material behavior in multiple simulated states, and the multiple users cannot vary the fixed constituent property constraints across multiple simulations.

10. The system of claim 9, wherein the composite material properties comprise:

a modulus of elasticity in a first direction;

a modulus of elasticity in a second direction that is normal to the first direction;

a shear modulus in a plane defined by the first direction and the second direction; and

a Poisson ratio in the plane defined by the first direction and the second direction.

11. The system of claim 10, wherein the composite material properties comprise a coefficient of thermal expansion.

12. The system of claim 10, wherein the composite material properties comprise:

a modulus of elasticity in a third direction that is normal to both the first direction and the second direction;

a shear modulus in a plane defined by the first direction and the third direction;

a shear modulus in a plane defined by the second direction and the third direction;

a Poisson ratio in the plane defined by the first direction and the third direction; and

a Poisson ratio in the plane defined by the second direction and the third direction.

13. The system of claim 12, wherein the composite material properties comprise:

a coefficient of thermal expansion in the first direction;

a coefficient of thermal expansion in the second direction; and

a coefficient of thermal expansion in the third direction.

14. The system of claim 10, wherein the composite material comprises a fiber in matrix composite material.

15. The system of claim 14, wherein the composite material comprises a woven carbon fiber/polymer matrix composite material.

16. The system of claim 9, wherein obtaining the set of adjusted material properties comprises determining in situ properties of a selected portion of the constituents of the composite material.

17. A non-transitory machine-readable medium with instructions stored thereon, the instructions configured to perform operations comprising:

obtaining composite material properties for a composite material to be simulated;

obtaining a composite microstructure for the composite material to be simulated; and

obtaining a set of adjusted material properties for one or more constituents of the composite material, for use in simulating the composite material, by processing the composite material properties and the composite microstructure using fixed constituent property constraints;

wherein the fixed constituent property constraints apply across multiple users and multiple locations to provide consistency in predicted material behavior in multiple simulated states, and the multiple users cannot vary the fixed constituent property constraints across multiple simulations.

18. The non-transitory machine-readable medium of claim 17, wherein the composite material properties comprise:

a modulus of elasticity in a first direction;

a modulus of elasticity in a second direction that is normal to the first direction;

a shear modulus in a plane defined by the first direction and the second direction; and

a Poisson ratio in the plane defined by the first direction and the second direction.