About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
30 Years of Nanoindentation with the Oliver-Pharr Method and Beyond
|
Presentation Title |
A Mathematical Framework for High Strain Rate Nanoindentation Testing |
Author(s) |
Sudharshan Phani Pardhasaradhi, Benjamin L Hackett, Christopher Walker, Warren C Oliver, George M Pharr |
On-Site Speaker (Planned) |
Sudharshan Phani Pardhasaradhi |
Abstract Scope |
Recent advances in electronics have enabled nanomechanical measurements with very low noise levels at fast time constants and high data acquisition rates. These capabilities open the door for a wide range of ultra-fast nanomechanical testing. Given the inherent dynamic nature of the high-speed testing, a thorough understanding of the instruments’ dynamics and electronics is extremely important for accurate measurements. In this talk, a mathematical framework that includes the mechanical and electronic contributions of the instrument and the material constitutive response is presented to provide guidelines for performing high strain rate nanoindentation testing. Simple closed form solutions that provide insights on the choice of test methodology, test parameters and instrument design will be presented along with the strain rate range over which accurate measurements can be performed with the commercially available nanoindenters. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Characterization, Mechanical Properties |