Change of Mechanical Properties of Polyethylene under the Action of an Electrical Discharge in Water

CZU 678.742.2: 537.528

Under examination are changes, caused by the impact of a shockwave generated during an electrical discharge in water, of mechanical properties of high pressure polyethylene used as a high-voltage insulator. The study is based on dynamic and static properties of polyethylene; its rheological characteristics are also considered. Significant difference between dynamic and static characteristics of polyethylene is highlighted, as well as the necessity to consider these features when choosing high-voltage insulation to be affected by shockwave generated by an electrical discharge in water.

Keywords: electrical discharge in water, dynamic and static properties of polyethylene, split Hopkinson (Kolsky) bar.