Abstract:
A shock wave in the polymethylmethacrylate excited with a testing machine of the sharpened pendulum-type. The energy yield stimulated by the microcracking in the localized damaged surface was detected with the acoustic emission (AE) method in the frequency domains of 80–200 and 600–800 kHz. The low-frequency AE series were attributed to polymer deformation, while the high-frequency emission was referred to the microcracking. Experiments were conducted in the temperature range from a room temperature to that of 110$^\circ$Ñ that is slightly higher than glass transition one (104$^\circ$Ñ). A relative contribution of the energy of deformation was prevalent at all temperatures. At temperatures higher than that of the glass transition, some signs of the strain hardening manifested themselves.
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