Acoustic-emission study of the fracture of structural materials, reinforced with a boron-fiber plastic, under thermal loading

Conclusions 1.The AE method makes it possible to establish the onset of failure in metal structures reinforced with boron-plastic under the influence of shear stresses at the boundary between the boron-plastic and the aluminum tube. These stresses develop with a change in ambient temperature.2.The dependence of the constant component of the amplitude of continuous AE signals on the maximum shear stresses is clear enough to satisfy the goal of checking for fractures in a reinforced structure under the influence of thermal stresses. However, if necessary, the total AE count can also be used.3.For the given type of boron-plastic-reinforced structure, the critical shear stresses determined by the AE method lie within the range 30–35 MPa. This agrees well with the values obtained in [2].