MCalibration Test Data Input Format

In this tutorial you will learn about:

  • The different file experimental file formats that MCalibration uses for different load cases.

Test File Format

MCalibration can import text files (including .csv files), but cannot import native Excel files (.xlsx, .xls).

All files should start from time, stress, and strain of zero unless otherwise noted.

MCalibration can also import test data in Abaqus input file format with the Import Material Model button:

    • *UNIAXIAL TEST DATA

    • *BIAXIAL TEST DATA

    • *PLANAR TEST DATA

    • *VOLUMETRIC TEST DATA

Experimental Data Load Case Format

MCalibration expects three data columns:

    • Time, strain, and stress

    • Strain and stress can be either engineering or true

    • MCalibration will skip header lines of text

Other Data Columns with Experimental Data

MCalibration can use transverse strain and sample temperature measurements in addition to the uniaxial data

This data is loaded in the same way you load other experimental data

Dynamic Data Load Case Format

The Dynamic Data load case is used for Dynamic Mechanical Analysis (DMA) data.

The load case requires a data file with the following columns: mean strain, strain amplitude, frequency, temperature, storage modulus, and loss modulus.

The storage and loss modulus should be the Young’s modulus (E’, E”) when the loading mode is Uniaxial.

The storage and loss modulus should be the shear modulus (G’, G”) when the loading mode is Simple Shear.

Creep and Stress Relaxation Data

Data for a Creep Data load case should contain time and strain data only. The first time point should be zero, and the first strain point should be non-zero.

Data for a Relaxation Data load case should contain time and stress data only. The first time point should be zero, and the first stress point should be non-zero.

The rate of loading and creep or relaxation level are determined by the parameters you specify in the load case (image at right).

Ball Drop Data

The Ball Drop load case requires only the time and force.

This load case uses Abaqus/Explicit as the default solver.

MCalibration automatically calculates the ball position from the provided experimental data.

Compression with Friction

The Compression with Friction load case is used to perform inverse calibrations using Abaqus Standard or Explicit.

The input data should be time, strain, and stress.

Tension Test Data

The Tension Test load case is used to perform inverse calibrations using Abaqus.

The input data should be time, crosshead displacement, and force.