FORMATION OF A SPALL CAVITY IN A DIELECTRIC DURING ELECTRICAL EXPLOSION

被引：7

作者：

Burkin, V. V. ^{[1
]}

Kuznetsova, N. S. ^{[1
]}

Lopatin, V. V. ^{[1
]}

机构：

[1] Tomsk Polytech Univ, High Voltage Res Inst, Tomsk 634050, Russia

来源：

JOURNAL OF APPLIED MECHANICS AND TECHNICAL PHYSICS | 2010年 / 51卷 / 01期

基金：

俄罗斯基础研究基金会;

关键词：

electrical explosion; shock-wave perturbations; spall cavity; mechanical stresses;

D O I：

10.1007/s10808-010-0021-2

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The wave dynamics of the stress-strain state of a solid dielectric during electrical explosion near its surface is analyzed. A quantitative model of an electrical explosion is developed which describes the operation of a high-voltage generator, the expansion of the discharge channel, and the generation and distribution of shock-wave perturbations. Two mechanisms of formation of a spall cavity on the surface of the solid are considered: the less energetic mechanism implemented by means of the waves reflected from the surface, and the more energetic mechanism in which result from the action of a direct wave of compressive stresses. The effects of the reflection surface shape and the mode of energy input into the channel on the possible fracture pattern are estimated.

引用

页码：137 / 144

页数：8