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.