“…In such cases, a so-called non-local characteristic length parameter(s) should be considered (Zhang et al, 2018). Fracture mechanics specimens such as compact tension (Acharyya and Dhar, 2008; Dotta and Ruggieri, 2004) single edge notched tension (Chen and Lambert, 2003), single edge notched bending (Qiang and Wang, 2019; Sarzosa et al, 2016), drop weight tear testing (Scheider et al, 2014; Nonn and Kalwa, 2012) have been used for the calibration of both the void and characteristic length parameters either separately or simultaneously. It is interesting to note that machine learning methods have also been recently applied to the identification of GTN parameters (Chen et al, 2021; Ouladbrahim et al, 2021).…”