About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
100 Years and Still Cracking: A Griffith Fracture Symposium
|
Presentation Title |
Leveraging Griffith’s Energy Balance in Extreme Environments |
Author(s) |
Timothy P. Weihs |
On-Site Speaker (Planned) |
Timothy P. Weihs |
Abstract Scope |
When materials impact each other at high velocities, multiple failure modes can occur such as spall and fragmentation. In this talk I describe collaborative efforts that leverage new experimental and computational methods to explore high-rate spall failure in Mg alloys and fragmentation in reactive solids following high-rate impacts. In the case of the magnesium alloys we identify the effects of grain size, texture and particle size on spall strength. In the case of reactive solids, we fabricate powder compacts with varying degrees of fracture toughness and then correlate these toughness values with the particle size distributions that result from fragmentation following impact. In both cases we explore how energy balances such as Griffith’s criterion can be used to describe void nucleation and fracture processes that contribute to spall and fragmentation during extreme, high-rate events. |
Proceedings Inclusion? |
Planned: |