Week - 9 Material Modeling from Raw Data

Aim: To model a material from raw data and validate the same using dog bone specimen.

Given Data:

Procedure:

• Using the data digitizer, the stress and strain data is obtained from the curve and copied to excel sheet and the unit is converted from ksi to GPa.
• Now the Effective plastic strain, effective stress are calculated and graph is plotted.

• Now open the dog bone specimen in Ls prepost and create the section card for the dog bone specimen.

• Create the material card and assign the curve to the material.

• Assign the material and section card to the part.

• Assign boundary conditions for the dog bone specimen. One end of the specimen is constrained in all dof and the mid node on the other end is constrained in y dof.

• Assigning prescribed motion to the specimen.

• Creating control implict cards.

• Requesting all the necessary database cards like ASCII, d3plot and extent binary card.
• Now run the simulation.

Results:

Material validation:

• The stress and strain data from the results is used and stress vs strain curve is plotted.

• The resultant curve exactly matches with the input material curve.

Conclusion:

By seeing the resultant curve, it is concluded that the card is working as per the input curve given in Mat024.