Local stress fields in solids estimated by acoustical emission method

Based on the Zhurkov’s kinetic concept of solids’ fracture a local internal stress estimation method is introduced. Stress field is computed from the time series of acoustic emission intervals between successive signals. For the case of two structurally different materials the time evolution of these stresses is examined. It is shown that temporal changes of these stresses’ accumulation law may serve as a precursor of incoming macroscopic fracture.

О полях напряжений в гетерогенных средах, определяемых методом акустической эмиссии

Local internal stress estimation method based on the S.N. Zhurkov kinetic concept of solids fracture is introduced. The stress field is computed from the time series of acoustic emission intervals between the successive signals. For the case of two structurally quite different materials the time evolution of this stress is examined.

Влияние водорода на флуктуационное охрупчивание алюминия

The main processes occurring during vacancy generation in aluminum in the presence of hydrogen are described on the base of ab initio methods using the meta-functional SCAN. It was shown that hydrogen reduces the vacancy generation energy from 2.8 eV to 0.8 eV. In this case, eight hydrogen atoms located in the tetrahedral voids of the lattice around one aluminum atom make it much easier for it to move to the interstitial site. In accordance with the kinetic concept of embrittlement the dependence of the activation energy of hydrogen embrittlement of aluminum is calculated on the concentration of hydrogen and temperature. It is shown that hydrogen reduces the time of aluminum embrittlement only if its concentration in aluminum is more than critical one (~3⋅〖10〗^(-4) at T=293 K).

Elastic Motion

This chapter begins Part IV by offering a purely kinomenological theory of the elastic motions that define the appearance of being as time. Time, like space, eternity, and force, is an ontological description structured according a specific regime of motion. Part IV argues that the concept of time is a fundamentally kinetic concept. With some exceptions, almost all modern ontologies of the eighteenth through twentieth centuries, in one way or another, accept the reality and foundational nature of time. The thesis of this chapter is that temporal being is defined by a material and kinetic elasticity of motion. This elastic pattern of motion is defined by seriality, subjectivity, and elastic subjectivity.

Tensional Motion

Beginning around the fifth century CE, alongside the decline of the Roman Empire and the increasing decentralization of political power in the West, a new regime of motion began to take hold: tensional force. The task of Part III is to create a kinetic concept of force and explain the theological (descriptive) and kinographic (inscriptive) conditions of its dominant historical emergence in the West. Chapter 23 offers a purely kinomenological theory of the tensional motions that define the being as force. The thesis of the chapter is that dynamic being is defined by a material and kinetic tensional motion. The kinetic concept of force has three major kinetic features: tensional motion, triangulation, and relation.

The Determination and Practical Application the Kinetic Constants of Destruction of Rocks with Modified Zhurkov’s Formula

Any kind of destruction is bound to microckracks. One of the theoretical model of microcracking is kinetic concept of strength (KCS) by S.N. Zhurkov. This theory allows to associate the time to failure with the activation energy and activation volume in single formula. But however, there are options for destruction in which this formula is incorrect. In this article we presents new modification of Zhurkov’s formula. Also, we present two possible practice applications of kinetic constants of the destruction.