True Fracture Strain Measurement and Derivation for GISSMO Calibration
2022-01-0270
03/29/2022
- Event
- Content
- The importance of true fracture strain was initially highlighted in the context of local versus global formability considerations used in material selection among advanced high strength steels (AHSSs) of similar tensile strength. Inspired by the relative studies, a precedent work had compared the discrepant fracture strain results from the digital image correlation (DIC) and the optical measurement techniques. This work further investigated various factors, such as the measurement techniques, the effective strain formula, and the fracture surface morphology, which could affect the true fracture strain measurement and derivation results, and subsequently the calibration of the Generalized Incremental Stress State dependent damage Model (GISSMO) used in crash simulations. In the meantime, explanations and discussions on the possible mechanisms behind these effects were also presented.
- Citation
- Hu, J., and Thomas, G., "True Fracture Strain Measurement and Derivation for GISSMO Calibration," SAE Technical Paper 2022-01-0270, 2022, .