TY - JOUR

T1 - General effects of pulse electric breakdown of dielectric gaps and dynamic failure of continuous media

AU - Petrov, Yuri

AU - Smirnov, Ivan

N1 - Conference code: 21

PY - 2016/1/1

Y1 - 2016/1/1

N2 - In this paper we consider some general effects observed at pulse electric breakdown of dielectric gaps and dynamic failure of continuous media. The effect of time and strain rate dependence of limiting characteristics, the substitution effect of maximal strength, as well as failure and breakdown with delay are considered. Despite the different physical nature of mechanical failure and electrical breakdown, these effects can be modeled based on a common approach of the incubation time criterion. It is discussed that the strain/stress rate dependence of strength and the volt-time characteristic of a dielectric medium cannot be used as a universal characteristic of the material's mechanical and dielectric strength and should be determined for each specific case. It is shown that the time parameter, which is invariant to the action history, is more appropriate as a characteristic of the dynamic strength. With the incubation time criterion one can construct a unified time dependence of the mechanical or electrical strength consisting of quasi-static and dynamic regimes of action.

AB - In this paper we consider some general effects observed at pulse electric breakdown of dielectric gaps and dynamic failure of continuous media. The effect of time and strain rate dependence of limiting characteristics, the substitution effect of maximal strength, as well as failure and breakdown with delay are considered. Despite the different physical nature of mechanical failure and electrical breakdown, these effects can be modeled based on a common approach of the incubation time criterion. It is discussed that the strain/stress rate dependence of strength and the volt-time characteristic of a dielectric medium cannot be used as a universal characteristic of the material's mechanical and dielectric strength and should be determined for each specific case. It is shown that the time parameter, which is invariant to the action history, is more appropriate as a characteristic of the dynamic strength. With the incubation time criterion one can construct a unified time dependence of the mechanical or electrical strength consisting of quasi-static and dynamic regimes of action.

KW - dynamic failure

KW - failure delay

KW - pulse electric breakdown

KW - strain rate dependence

KW - strength substitution effect

KW - the incubation time criterion

KW - volt-time characteristic

UR - http://www.scopus.com/inward/record.url?scp=85065780594&partnerID=8YFLogxK

U2 - 10.1016/j.prostr.2016.06.056

DO - 10.1016/j.prostr.2016.06.056

M3 - Article

VL - 2

SP - 430

EP - 437

JO - Procedia Structural Integrity

JF - Procedia Structural Integrity

SN - 2452-3216

T2 - 21st European Conference on Fracture (ECF)

Y2 - 20 June 2016 through 24 June 2016

ER -