Week - 9 Material modeling from raw data

OBJECTIVE:

The main objective of this challenge is to extract the data from the given graph and to create a material card MAT 24 and to use the MAT 24 card in a dogbone specimen to stimulate a tensile behaviour of the dogbone specimen.

PROCEDURE:

- Initially the points in the graph are taken to plot in excel using the data digitizer application.

- The plotted points are exported to excel to further interpolate on stress and strain values.

- The stress value derived is Engineering stress and the strain value derived is engineering strain value.

- True stress and strain value are calculated and converted using the formula given in the video.

- From true stress and true strain, effective plastic strain and Von-Mises stress have been calculated and the same has been used to plot the graph in the excel.

- These stress and strain values are defined in load curve card which is used in Material card for the reference.

- Dogbone specimen is taken and the necessary boundary conditions like fixing one end of the specimen to simulate tensile behaviour of the specimen is done.

- Once the simulation went through, the stress and strain value are calculated and plotted.

IMAGES AND GRAPH:

Fit Curve

STRESS - STRAIN curve extracted from the graph

This effective plastic strain value and Von-Mises stress curve is plotted in load defining curve and the simulation has been run.

As there was no change in length, strain value is constant through out the simulation.

The link has been submitted for validation

https://drive.google.com/open?id=1GmPkOIOhclUN2FFFvflB5f16PWVEFDgl