About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
|
Presentation Title |
Stochastic Mechanical Modeling of Cavitary Defects in Porous Aluminum Structures |
Author(s) |
Mujan N. Seif, Alexandre Martin, Matthew J. Beck |
On-Site Speaker (Planned) |
Mujan N. Seif |
Abstract Scope |
The inherent complex, disordered, and porous microstructure of aluminum foam makes it an ideal material for hypervelocity impact shielding. However, this same structure 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 nano-/micro- (local) to macro- (bulk) length scales is critical to quantifying the structural 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, this approach integrates complex structure and predicts mechanical behavior in the form of statistical distributions—as opposed to arithmetic means—of properties. Here, we compute and compare these distributions as a function of cavity shape, orientation, and volume, as well as overall length scale. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Mechanical Properties, Modeling and Simulation |