Figure 3
From: Novel biaxial tensile test for studying aortic failure phenomena at a microscopic level
Biaxial test of PDMS sheets. Typical images of the sheet before (a) and after (b) biaxial stretching and changes in the strain and its standard deviation in three PDMS sheets (c). Nine markers were numbered (a) and tracked with colored lines (b). Changes in the distances from the center marker 1 were measured for the other eight markers, and their nominal strains were calculated and averaged for each sheet (c).