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Calibration of viscoelastic material model using load-depth indentation data

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Posts: 3

mukundsrivastava

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Jun 06, 2021 3:38 pm

(@mukundsrivastava)

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Joined: 2 weeks ago

Hi,

I have the time, indentation depth, and load data of a viscoelastic material from an indentation test. The goal is to understand the local behavior of the viscoelastic material (unlike the bulk behavior that is recorded from a DMA test).

While using MCalibration, which "Load Case Type" should be selected? Also, how to select the relevant material model for calibration? I wish to use the calibrated data for an ABAQUS/Standard simulation.

Thanking you,

Mukund

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Jorgen

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Jun 08, 2021 8:41 pm

(@jorgen)

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Joined: 2 years ago

You can analyze that data using MCalibration if you use one of the following load case types: "Abaqus Inverse Solver" or "General Inverse Solver". I created one tutorial about the Abaqus inverse solver option: https://polymerfem.com/mcalibration-tutorial-abaqus-inverse-calibration/ .

/Jorgen

Posts: 3

mukundsrivastava

Topic starter

Jun 10, 2021 6:56 am

(@mukundsrivastava)

New Member

Joined: 2 weeks ago

Thank you for your help, Dr. Jorgen!

The calibration is running, but I'm getting a predicted curve with 0 force values. What could be the possible reasons for the 0 force values?

I'm using the ABAQUS External Solver load case to calibrate my indentation parameters. The predicted curve yields 0 force values with the ABAQUS hyperelastic viscoelastic material model. As a troubleshooting step, I have verified my ABAQUS input file by running a Linear Elastic simulation on the ABAQUS standard. The ABAQUS simulation is working well.

I have attached the image of the predicted curve for your kind perusal.

Attachment:optimization_2_run_once.png