| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Mesoscale Phenomena in Functional Polycrystals and Their Nanostructures
|
| Presentation Title |
Polycrystal-inspired Stochastic Mechanical Modeling of Complex, Heterogeneous Porous Microstructures |
| Author(s) |
Mujan N. Seif, Matthew J. Beck |
| On-Site Speaker (Planned) |
Mujan N. Seif |
| Abstract Scope |
The inherent complex, disordered, and porous microstructure of Duocel aluminum foam makes predictive modeling of its mechanical properties difficult. Its randomly oriented constituent ligament structure also creates significant variability in properties at different length scales. An understanding of the transition from micro- (local) to macro- (bulk) length scales is critical to quantifying the effects of various inhomogeneities like inclusions, cracks, etc. To this end, we utilize a homogenizing approach inspired by those applied to polycrystals. Rather than simplifying the material such that its unique characteristic structural features are neglected, we present a stochastic modeling approach that integrates complex structure and predicts elastic mechanical behavior in the form of statistical distributions—as opposed to arithmetic means—of properties. Here, we compute these distributions as a function of cavity orientation and volume, as well as overall length scale. |