Dynamics of interaction of a high-current electron beam with polymeric materials

Experimental determination of the fracture time of polymethylmethacrylate and polystyrene behind the shock wave excited by a high-current pulsed electron beam

“…When studying the frac ture of PS and PMMA polymers under the action of a shock wave excited by a high current pulsed electron beam, we [7,8] detected a substantial difference in the spatial positions of the fracture zone in these polymers despite the fact that many their mechanical parame ters are close. Fracture (cracking, turbidity, etc.)…”

Experimental Evaluation of the Spallation Strengh of Polymeric Targets

“…The investigation was made in the rage of power density: 35-1500 J/cm 2 . The way of distraction of the investigated materials (Plexiglas and polystyrene) under pulse spatial energy release is different despite of their resembling physicotechnical characteristics [1,2]. It is described in the article that in polystyrene cracks appear directly in the area of energy release but in Plexiglas near the area of energy release you may see an undamaged transparent section and cracks appear behind it.…”

“…Исследование проводилось в диапазоне плотности энергии 35-1500 Дж/см 2 . Несмотря на близкие физико-технические параметры исследуемых полимеров (оргстекло, полистирол, эпоксидные смолы), характер их раз-рушения при импульсном объёмном энерговыделении различен [1,2]. Показано, что в полистироле трещины возникают непо-средственно из зоны энерговыделения, в оргстекле рядом с зоной энерговыделения наблюдается прозрачный неповреждённый участок, за которым образуются трещины.…”