O'Reilly logo

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

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

7.3 BRIDGES 1 AND 5: ELECTRONICS STRUCTURE CALCULATIONS: CONNECTIONS TO THE ATOMIC SCALE AND MACROSCALE CONTINUUM LEVEL

In order to develop a macroscale continuum void–crack nucleation model for ductile metals with second phases, electronic scale and atomic scale simulations are warranted as defined by Bridge 1 in Figure 7.3. The downscaling requirements for the atomistic simulations are the elastic energies per volume and elastic moduli for the Al-Si interface. Figure 7.9 illustrates the downscaling/upscaling bridge between the two length scales. Bridge 5 is simply the elastic moduli that are often determined by experiments but can be directly calculated by these lower length scale simulations. For this case study, the elastic moduli are known for the aggregate material, so the focus in this section is on Bridge 1.

Figure 7.9 Schematic of the bridge between the electron and atom length scales and associated downscaling requirements and upscaling results.

c07f009

The competing processes of silicon fracture and aluminum–silicon interface debonding needed to be sorted out in terms of developing the critical limiting parameters. In fact, understanding the debonding and fracture characteristics of bimaterial interfaces is central to modeling the mechanical response of not only cast A356 aluminum alloy but also a broad range of engineering materials. Metal matrix composites [57], unidirectional ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required