Figure 3
(a)–(d) Views of the specimen at different steps of the multi-axial test. (a) Unloaded specimen placed between tensile grips. (b) Elongated specimen during tensile loading. (c) Elongated specimen with shear grips positioned. (d) Stretched and sheared specimen during shear loading. (e) Calibration curve showing the specimen elongation as a function of the roller angle. (f) Image correlation carried out at the back of the sample to access the shear level. |