About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Forming and Joining of Advanced Sheet Metal Materials
|
| Presentation Title |
Lengthscale Transition from Coupons to Components: Direct Input of Optical Strain Data into Fracture Models |
| Author(s) |
Cameron Tolton, Advaith Narayanan, Steven Sheng, Eric McCarty, Cliff Butcher |
| On-Site Speaker (Planned) |
Cameron Tolton |
| Abstract Scope |
This presentation examines how Digital Image Correlation (DIC) captures local surface strains during coupon testing for material characterization. Strain calculations depend on processing parameters, known as the ‘Virtual Strain Gauge’ (VSG), which can be adjusted to improve results for different specimen geometries and materials. We explore how varying the DIC length scale impacts strain measurements in constitutive and fracture coupon tests. Emphasis is placed on the transferability of the VSG to finite element models of the coupon tests with mesh sizes up to 5 mm. Stress-state dependent fracture loci used in commercial FE software such as the GISSMO model are then fit to the measured experimental surface strains to determine if direct input of the DIC data can be used for fracture calibration and prediction. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Mechanical Properties, Computational Materials Science & Engineering |