The micromechanics of polymer fracture

Zhurkov, S. N.; Kuksenko, V. S.

doi:10.1007/bf00116370

Cited by 106 publications

(51 citation statements)

References 6 publications

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“…It is very well known that these materials subjected to a constant load may break after a certain time, which is a function of the applied load. Many models have been proposed to predict this failure time, but the physical mechanisms remain unclear [3,4,13,14]. Very recently it has been proposed [15,16] a model, which explains quite well the failure time of microcrystals [17] and gels [19] submitted to a constant stress load.…”

Section: Introductionmentioning

confidence: 99%

Failure time and critical behaviour of fracture precursors in heterogeneous materials

et al. 2002

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The acoustic emission of fracture precursors, and the failure time of samples of heterogeneous materials (wood, fiberglass) are studied as a function of the load features and geometry. It is shown that in these materials the failure time is predicted with a good accuracy by a model of microcrack nucleation proposed by Pomeau. We find that the time interval δt between events (precursors) and the energy ε are power law distributed and that the exponents of these power laws depend on the load history and on the material. In contrast, the cumulated acoustic energy E presents a critical divergency near the breaking time τ which is E ∼ τ −t τ −γ . The positive exponent γ is independent, within error bars, on all the experimental parameters.

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Section: Introductionmentioning

confidence: 99%

Failure time and critical behaviour of fracture precursors in heterogeneous materials

et al. 2002

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“…The number of microcracks accumulated by the time of the earthquake in the volume unit can be determined from the concentration destruction criterion [1]: L N 3 We can calculate the time in two ways: following M. A. Sadovsky-K. Tsuboi [19] and following S.N.Zhurkov [20].…”

Section: Calculation the Volume Density Of Currentsmentioning

confidence: 99%

Disturbances of the Natural Electric Field in the Atmosphere Before Technogenic Earthquakes

Sirota

Ivanov

2018

E3S Web Conf.

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Abstract. Modern seismology attaches great importance to the methods of short-term earthquake forecasting. One of these methods is a method based on the registration of disturbances of the atmospheric electric field and the field arising in rocks before earthquakes. Until now, this problem is discussed at the level of hypotheses. The mechanism of perturbations is unclear and the literature does not provide any convincing evidence of the explanation of the observed phenomena -flashes and columns of light, breakdown of electric cables in the earth a few hours before the earthquake and other phenomena. In the present article on the basis of the phenomenon of fast cracks loading discovered in the nineties of the last century [1] the explanation of these phenomena is offered by the solution of a direct problem about an electric field of the hearth of technogenic earthquake in the atmosphere.

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“…As a rst approximation, breaking of a bond in a single-molecule experiment can be described in terms of a modied Arrhenius equation inspired by the Zhurkov equation proposed to describe time-dependent mechanical phenomena [15]:…”

Section: Comparison Of Reactions Accordingmentioning

confidence: 99%

Mechanochemistry and the Other Branches of Chemistry: Similarities and Differences

Takács

2012

Acta Phys. Pol. A

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It is argued that mechanical action can induce a unique chemical reaction, if enough mechanical energy is concentrated in the bonds involved in the process to bypass the activation energy. This can happen at crack tips, at the core of dislocations, or at the asperities of colliding or sliding surfaces. A mechanical reaction is always complex, as the macroscopic work is distributed among many possible reaction sites. In comparison, an elementary photochemical reaction is induced by a single photon, while thermochemical reactions rely on the accidental concentration of energy by thermal uctuations. The paper also compares mechanochemical synthesis in a ball mill with reactions under well-dened loading conditions and mechanochemical experiments carried out on the molecular scale. Closer interaction among those branches of mechanochemistry is urged.

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The micromechanics of polymer fracture

Cited by 106 publications

References 6 publications

Failure time and critical behaviour of fracture precursors in heterogeneous materials

Failure time and critical behaviour of fracture precursors in heterogeneous materials

Disturbances of the Natural Electric Field in the Atmosphere Before Technogenic Earthquakes

Mechanochemistry and the Other Branches of Chemistry: Similarities and Differences

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