ICME 2015 HW4
- Crystal Plasticity (CP) using Abaqus and a user developed crystal plasticity finite element method
- MSU ISV Plasticity-Damage Model via DMGfit and Abaqus
All necessary input files and scripts are provided in the /cavs/general/Projects/ICME_2015/HW4/ directory. Move these files to your own directory (and make a backup copy) before trying to perform any simulations.
Use /scratch/"Your Directory" for best results.
Write a full report that follows a journal article manuscript format (include figures and tables in the text). Please double-space your document
Upon completion, upload a .pdf and .doc(x) file to your group folder in the ../ICME_2015/HW4/ directory. Be sure to also upload the requested files and plots from each section of the homework.
- Run a multigrain crystal plasticity single finite element simulation
- Calibrate the macroscale Internal State Variable (ISV) model
- Run a one element finite simulation to verify the calibration
1. Crystal plasticity finite element calculations (upscaling for ISV plasticity calibration)
- a. Run a one element finite element simulation in compression, tension, and torsion using crystal plasticity. Use a minimum of 180 grains to plot the stress-strain curves that will be used for calibrating the macroscale model.
- b. Plot stress-strain curves for compression, tension, and torsion using an average of the polycrystalline aggregate from the three hardening sets determined in HW3.
- c. Report your results.
2. ISV Plasticity Model Calibration
- a. Use DMGfit to calibrate the MSU ISV Plasticity-Damage Model to the mesoscale polycrystalline plasticity stress-strain curve for nickel (see Figure 9.17 pg 401 in textbook). Plot all three stress-strain curves comparing the crystal plasticity results to the plasticity-damage ISV calibration results.
- b. Run a one element simulation in ABAQUS with the DMG UMAT to verify the results from Part 1.
- Visit the Macroscale page and collect the user material (UMAT) and ABAQUS input file for aluminum in tension (implicit) OR obtain the input decks from the ICME2015 scratch folder
- Modify the input decks for compression, tension, and shear to reflect the calibrated parameters determined using DMGfit
- Open permissions on files
chmod 755 *
- Enter the following software setup command in a terminal:
swsetup abaqus(This can be added to your .bashrc file so that it loads automatically when logging into a compute node)
- Submit the abaqus job either locally or to Raptor using the following command:
abaqus job=NAME_OF_INPUT user=NAME_OF_UMAT
- Do not include the file extension (.inp) in the "NAME_OF_INPUT".
- c. Compare stress-strain results from the plasticity-damage ISV calibration to the verification results from the ABAQUS single finite element simulation.
- d. Show the macroscale ISV constants and uncertainty values in the optimization of the calibration.
- e. Report your results.
3. Room for Improvement
As with the previous homeworks, improve the tutorial(s) by adding/modifying the ICME website for:
- 1. Crystal Plasticity
- 2. MSU ISV Plasticity-Damage Model