About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
Determining Constitutive Properties of Metals under Extreme Deformation Conditions Using Cutting |
Author(s) |
Harshit Chawla, Shwetabh Yadav, Hrayer Aprahamian, Dinakar Sagapuram |
On-Site Speaker (Planned) |
Harshit Chawla |
Abstract Scope |
We demonstrate a novel application of cutting or “machining” as a high-throughput approach for determining the constitutive properties of metals under moderate-to-large plastic strains and high strain rates, deformation regimes that are difficult to access using conventional material testing methods. The constitutive parameters are obtained using in situ high-speed measurements of the plastic flow in the cutting deformation zone, coupled with an inverse scheme to estimate the parameters from full-field deformation data. The inverse algorithms are further tailored, based on the underlying structure of different constitutive laws, to ensure global optimality and unique parameter estimates. The approach is demonstrated using ductile metals with different constitutive models under conditions of large plastic strains up to ~ 10 and strain rates up to ~ 10^3 /s. Issues related to the effect of measurement uncertainties (e.g., noise) on parameter estimates and further extension of this approach to higher strain rates are also discussed. |
Proceedings Inclusion? |
Planned: |