Methods and systems for modeling of distortion in molded composites

Patent metadata

Field	Value
Publication number	US-10315340-B2
Application number	US-201615082984-A
Country	US
Kind code	B2
Filing date	Mar 28, 2016
Priority date	May 8, 2015
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

Methods and systems are provided for generating a mold. In one embodiment, a method includes: determining, by a processor, a fiber orientation for a plurality of points in a part; determining, by the processor, a distortion value based on the fiber orientations; and generating, by the processor, mold dimensions based on the distortion values.

First claim

What is claimed is:

1. A computer implemented method for generating a mold for compression molding, comprising:
determining, by a processor, a first point of a flat sheet to be molded;
mapping, by the processor, the first point of the flat sheet to a second point of the mold;
determining, by a processor, a fiber orientation based on the mapping;
mapping, by the processor, the second point of the mold to a third point of a part;
associating, by the processor, the fiber orientation with the third point;
determining, by the processor, a distortion value based on the fiber orientation;
generating, by the processor, mold dimensions based on the distortion value; and
generating a second mold based on the mold dimensions.

2. The method of claim 1 , wherein the determining the fiber orientation is based on an affine transformation between the first point in the flat sheet and the second point in the mold.

3. The method of claim 1 , further comprising:
determining at least one material property of the third point of the part, and wherein the determining the distortion value is further based on the material property.

4. The method of claim 1 , further comprising:
determining a thermal property of the third point of the part, and wherein the determining the distortion value is further based on the thermal property.

5. The method of claim 1 , further comprising: determining a mechanical property of the third point of the part, and wherein the determining the distortion value is further based on the mechanical property.

6. The method of claim 1 , wherein the determining the distortion value is based on a cooling method.

7. The method of claim 6 , wherein the cooling method predicts distortion based on a cooling of the part at least one of in the air, in contact with the mold on one side, in contact with the mold on both sides, and in a free state.

8. The method of claim 1 , further comprising:
determining at least one thermal value for each point of the plurality of points;
determining at least one mechanical property for each point of the plurality of points; and
determining the distortion values based on a cooling method that is based on the thermal values, the mechanical properties.

9. The method of claim 1 , wherein the mold dimensions adjust the mold in a direction that is opposite of the distortion value.

10. A system for generating a mold for compression molding, comprising:
a non-transitory computer readable medium comprising:
a first module that, by a processor, determines a first point of a flat sheet to be molded, maps the first point of the flat sheet to a second point of the mold, and determines a fiber orientation based on the mapping;
a second module that, by a processor, maps the second point of the mold to a third point of a part, associates, the fiber orientation with the third point, and determines a distortion value based on the fiber orientation; and
a third module that generates, by a processor, mold dimensions for adjusting dimensions of the mold based on the distortion values.

11. The system of claim 10 , wherein first module determines the fiber orientation based on an affine transformation between the first point in the flat sheet and the second point in the mold.

12. The system of claim 10 , further comprising:
a fourth module that determines at least one material property of the third point of the part, and wherein the second module determines the distortion value based on the material property.

13. The system of claim 10 , further comprising:
a fifth module that determines a thermal property of the third point of the part, and wherein the second module determines the distortion value based on the thermal property.

14. The system of claim 10 , further comprising:
a sixth module that determines a mechanical property of the third point of the part, and wherein the second module determines the distortion value based on the mechanical property.

15. The system of claim 10 , wherein the second module determines the distortion value based on a cooling method.

16. The system of claim 15 , wherein the cooling method predicts distortion based on a cooling of the part at least one of in the air, in contact with the mold on one side, in contact with the mold on both sides, and in a free state.

17. The system of claim 10 , further comprising:
a fifth module that determines at least one thermal value of the first point of the flat sheet;
a sixth module that determines at least one mechanical property of the first point of the flat sheet, and
wherein the second module determines the distortion values based on a cooling method that is based on the thermal values, and the mechanical properties.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Foss Peter H
• Arinez Jorge F

Classifications

• B29C33/3835 Primary

  Designing moulds, e.g. using CAD-CAM · CPC title

• G06F2113/26

  Composites · CPC title

• B29C43/36

  Moulds for making articles of definite length, i.e. discrete articles · CPC title

• G06F30/20

  Design optimisation, verification or simulation (optimisation, verification or simulation of circuit designs G06F30/30) · CPC title

• B29K2105/0863

  SMC, i.e. sheet moulding compound · CPC title