Calculate critical area
areaCrit(vickers, stress, factor = 1.56, scale = 1e+06)specific Vickers hardness
stress level to be applied
specific material dependant factor, default set to 1.56 for inner defects
scale factor, area in square millimeters (default)
critical area in \([mm]^2\)
The critical area (see reference below) is roughly defined by the projected defect area above which the specific material defect becomes particularly hazardous for the failure of the whole specimen.
Y. Murakami (2002). Metal Fatigue: Effects of Small Defects and Nonmetallic Inclusions. Elsevier, Amsterdam.