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Integrated Computational Materials Engineering (ICME) for Metals: Using Multiscale Modeling to Invigorate Engineering Design with Science by Mark F. Horstemeyer

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7.5 BRIDGES 3 AND 7: MICROSCALE FINITE ELEMENT SIMULATIONS: CONNECTIONS TO THE MESOSCALE AND MACROSCALE

Now that the Al-Si interface fracture criterion was determined from the MEAM MD simulations for these microscale FEA simulations, the second-phase particles could realistically be included into the FEA. As Figure 7.23 illustrates, Bridge 3 takes these microscale FEA results and incorporates them into the next higher length scale. The downscaling requirements for the mesoscale finite element simulations were related to the definition of the void/crack nucleation; hence, these microscale FEAs were used to help determine the important features for void/crack nucleation. As such, a parametric study using an analysis of variance (ANOVA) method was first conducted to quantify the first-order parametric effects [55]. Figure 7.23 illustrates the downscaling/upscaling bridge between the two length scales.

Figure 7.23 Bridge 3 between the atom and particle levels related to void/crack nucleation.

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Bridge 7 is related to transferring the void nucleation results to the macroscale. The macroscale ISV model used the results to help formulate the rate equation for void nucleation, whereas the mesoscale FEA, from Bridge 3, used the results to define the void nucleation as a known quantity to help resolve the unknown quantities of void coalescence.

Figure 7.24 shows the upscaling per Bridge ...

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