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MCalibration Tutorial:

Calibrate a Built-in Abaqus Material Model

using a MCalibration Template

Overview

This presentation illustrates how to calibrate any of the

built-in material models in Abaqus using a MCalibration

“Abaqus-Template” material model

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Step 1: Load in the Experimental Data

Load in the experimental data

This example is using experimental data for a rubber tested in uniaxial compression

Depending on the selected material model it may be necessary to use multiple experimental data sets

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Step 2: Set the Solver Type

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Specify a suitable Abaqussolver

Select “Abaqus/Standard” to use Abaqus/Standard with one of the built-in material models or a PolyUModmaterial model

Select “Abaqus/Explicit” to use Abaqus/Explicit with one of the built-in material models or a PolyUModmaterial model

In this example we will use a built-in Abaqus/Standard material model

Step 3: Specify the Material Model

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Select an Abaqus-Template material model

Note that you can modify the template by hand

Variables are specified by the syntax: %var=15%, where var is the variable name and 15 is the starting guess of the variable

Step 3: Specify the Material Model

The material parameters

can be specified as

variables, equations, or

even using complete Python

scripts

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Step 4: Open the Preferences Dialog

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Click the “Preferences” Button

Step 5: Set the Abaqus Path

Make sure the

specified path to

Abaqus is

correct

Make sure

“Delete Abaqus

Files...” is not

selected if you

want to examine

the Abaqus inp-

file that

MCalibration

generates

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Step 6: Run One Simulation

Click the “Run Once” button to make sure the simulation works

In this case the default set of parameters is not very good

You can then manually modify the material parameters or run the optimize parameters by clicking on “Run Calibration”

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Step 7: Manual Calibration

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One way to improve the

predictions is to manually

manipulate some of the

parameters

Step 8: Automatic Calibration

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The material parameters can be optimized by clicking on “Run Calibration”

In this case the selected Drucker-Prager plasticity model does not work very well (as expected)

Conclusions

This documents shows how the MCalibration software

can be used to calibrate any of the built-in material

models in Abaqus by using an “Abaqus-Template”

representation

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