OOF2 and Abaqus

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Microstructure FEA by OOF2 and Abaqus

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• OOF2 is a program developed by NIST which can take a micrograph to create a finite element model with a specific microstructure.
• OOF2 itself can solve for the local behavior of a material and a range of physical phenomena. The microstructure model generated in OOF2 can also be imported in Abaqus for analysis.
• Comparing to “drawing” a simplified microstructure in Abaqus, combining OOF2 and Abaqus is a better approach to microstructure FEA.

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• General procedure
  • Set pixel groups based on image pixels in OOF2.
  • Assign material properties to the pixel groups, including mechanical properties (Young’s Modulus, Poisson’s Ratio) and CTE in OOF2.
  • Meshing the image in OOF2.
  • Import the model with stable mesh generated by OOF2 for Abaqus simulation.
  • Simulate in Abaqus.
• We ran FEA in both OOF2 and Abaqus and compared the results to validate the approach.

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• Plain stress model
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Material	E (GPa)		CTE (ppm/)
Cu	110	0.35	16
Si	130	0.28	2.8

 

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