Week - 9 Material Modeling from Raw Data

Aim:

Use the diagram of the true stress-strain curve of graphite iron casting. Two curves are there for different material structures. Students need to pick any one of them and use the data to create either a MAT_024 or MAT_018 material model and then validate it.

Procedure

1. Import stress strain data from data digitizer. Use the software, mark the axis min and max value and plot the curve to get the digit.

2. Export the data to the excel format and save. Next open the file in excel and calculate true stress, true strain, effective plastic strain.

3. Open the keyword file in note pad and insert the stress and strain value. verify it in the ls-prepost

4. Insert Mat_24 material card, section, part, boundary condition, prescribed motion set.

5. Prepare for implicit run using implicit_auto, implicit_general, implicit_solution, implicit_solver, terminal.

6. Create database, and run the keyword file.

SOLUTION;

Von Mises Stress

Effective Plastic Strain

VALIDATION

Data are gathered from ls-prepost and validation plot is plotted in excel