Acoustic emission estimation of crack formation in aluminium alloys

In the paper a problem on the radiation of waves of acoustic emission (АЕ) during formation of penny-shaped crack in aluminium alloy elastic body under tensile and twisting loading is considered. By the method of integral transforms, the problem is reduced to the solving of Fredholm integral equation of the second kind. The dependences of component of displacement vector on time and distance to the viewpoint as well as amplitudes of the АЕ signals on the area of the crack and its spatial orientation are obtained.