About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
Path Dependence in Spall Fracture |
Author(s) |
David R. Jones, Daniel T Martinez, Ramon M Martinez, Saryu J Fensin, Neil K Bourne, George T Gray |
On-Site Speaker (Planned) |
David R. Jones |
Abstract Scope |
Materials subjected to shock or impulsive loading can undergo spall fracture, where the rapid unloading after the shock event drives a state of high strain-rate tension. In ductile metals, damage accrues through void nucleation, growth, coalescence, and then possibly full fracture of a spall scab. It is well known that spall is a weak-link dominated process, with microstructural features such as grain boundaries, twins, impurities etc. acting as nucleation sites for damage. Here, we present a method to study the effect of loading path - the entire stress-strain history of the material up to failure - on the spall process. Gas-gun flyer-plate impact experiments are used to investigate how the peak stress and pulse duration of the shock event affect the dynamic response of copper and titanium. Soft recovery is used to identify how the loading path changes the microstructure, and examine the effect on damage nucleation. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, |