| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
In-situ Measurement of Dynamic Stress due to Hyper-velocity Impact Using Nanosecond Resolved Raman Spectroscopy |
| Author(s) |
Abhijeet Dhiman, Hao Wang, Vikas Tomar |
| On-Site Speaker (Planned) |
Abhijeet Dhiman |
| Abstract Scope |
Shock induced stress measurements in materials is important to design materials for hypersonic vehicles, accident tolerant nuclear materials, and energetic materials and structures. In this work, a novel experimental setup to measure in-situ dynamic stress induced by impact from a particle moving at hyper-velocity has been used. The stress measurement is performed based on a time resolved in-situ mechanical Raman spectroscopy to measure in-situ dynamic stress in a Hydroxyl-terminated polybutadiene (HTPB) sample. The hyper-velocity particle is accelerated by a pulse. After the impact, the shock propagates through sample inducing dynamic stresses. The high-speed in-situ mechanical Raman spectroscopy uses variation in Raman shift as a function of time to obtain stress induced due to impact for varying strain rates. The Raman spectroscopy is performed at the GHz frequencies with an integration time of a few nanosecond to capture stress-waves induced due to impact. |
| Proceedings Inclusion? |
Undecided |