Investigation of failure of composite materials by the method of deformation luminescence in a broad velocity range of loading

Abstract

The article presents a way of investigating failure of materials with the aid of the method of deformation luminescence (DL) and describes the results of tests with specimens of laminated glass reinforced plastic with reinforcing structure (O2; ±60) and (±30; 902) in static and dynamic tension. Diagrams are plotted of the change of intensity of DL and stress σ11 vs. time at a speed of impact 0.5 and 1 m/sec, and also under static loading at the rate of 3 mm/min. It is shown that static and dynamic tension of laminated glass reinforced plastic is accompanied by DL expressing the jumpwise nature of step-by-step failure of the material.