Experimental evaluation of crack growth modeling results in a gray pig iron plate

The paper presents the results of experimental verification of a numerical solution to the problem of fracture of a cast-iron plate with a central hole, obtained by finite element modeling and an original author’s technique. Experimental verification is performed by real-time laser dynamic speckle interferometry using a software-hardware complex developed by the authors. The moments of transition from the stage of fatigue crack initiation to the stage of stable growth and subsequent brittle fracture of the plate are defined.