Systems and methods for determining material constitutive model parameters
AssigneeThe Texas A&M University System
InventorsDinakar Sagapuram, Harshit Chawla, Hrayer Aprahamian
Life of this patent
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Abstract
A method for determining constitutive parameters of a subject material includes collecting a force sensor output from a force sensor unit for measuring reactive forces applied to a deformation tool from a subject material travelling in a predefined direction relative to the deformation tool, collecting an image sequence output from a camera unit depicting a deformation zone formed between the deformation tool and the subject material as the subject material is plastically deformed by the deformation tool, and estimating a constitutive parameter of the subject material based on the force sensor output and the image sequence output.
Claims20
A system for determining constitutive parameters of a subject material, the system comprising:
- a testbed having an external surface configured to receive the subject material to couple the subject material to the testbed;
- a linear drive configured to transport the subject material, when coupled to the testbed, in a predefined direction at a predefined velocity;
- a deformation tool configured to physically contact and plastically deform the subject material in response to the transportation of the subject material in the predefined direction by the linear drive;
- a force sensor unit coupled to the deformation tool and configured to produce a force sensor output corresponding to reactive forces applied to the deformation tool from the subject material;
- a camera unit configured to produce an image sequence output of a deformation zone formed between the deformation tool and the subject material in response to plastic deformation of the subject material by the deformation tool;
- and
- a computer system coupled to the force sensor unit and the camera unit and comprising a parameter estimation module configured to estimate a constitutive parameter of the subject material based on the force sensor output and the image sequence output.
A method for determining constitutive parameters of a subject material, the method comprising:
- (a) collecting a force sensor output from a force sensor unit for measuring reactive forces applied to a deformation tool from a subject material travelling in a predefined direction relative to the deformation tool;
- (b) collecting an image sequence output from a camera unit depicting a deformation zone formed between the deformation tool and the subject material as the subject material is plastically deformed by the deformation tool;
- and
- (c) estimating a constitutive parameter of the subject material based on the force sensor output and the image sequence output.
A computer system for determining constitutive parameters of a subject material, the computer system comprising:
- a processor;
- and
- a storage device coupled to the processor and containing instructions that when executed cause the processor to:
- collect a force sensor output from a force sensor unit for measuring reactive forces applied to a deformation tool from a subject material travelling in a predefined direction relative to the deformation tool;
- collect an image sequence output from a camera unit depicting a deformation zone formed between the deformation tool and the subject material as the subject material is plastically deformed by the deformation tool;
- and
- estimate a constitutive parameter of the subject material based on the force sensor output and the image sequence output.
Dependencies are inferred from the claim text.