Line creep in paper peeling

Rosti, Jari; Koivisto, Juha; Traversa, Paola; Illa, Xavier; Grasso, J. R.; Alava, Mikko J.

doi:10.1007/s10704-008-9258-7

Cited by 9 publications

(20 citation statements)

References 38 publications

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“…The experiment labeled as "tensile" is the same experiment but with constant speed [3]. The distributions for waiting time τ = t i+1 − t i and velocity are also similar for all three cases [10].…”

Section: Comparison To Simulationsmentioning

confidence: 95%

“…The acoustic emission data is processed into t i , E i -pairs, where a heuristic method is used to identify the event and its energy. The same method is used in References [3,4,10,11]. Figure 1 shows an example of the t i , E i timeseries for a single creep experiment.…”

Section: Methodsmentioning

confidence: 99%

“…The slope of the line is -1.6. The tensile experiment refers to a similar experiment but with a constant velocity, from [10].…”

Section: Methodsmentioning

confidence: 99%

“…A line segment advances one step, if a force threshold is exceeded. A more detailed description for the simulations is available in Reference [10]. Here the focus is purely on the creep experiments.…”

Section: Comparison To Simulationsmentioning

confidence: 99%

“…It has been recently realized to be related to the way the interface averages the disorder (fracture toughness here) during its motion: due to the jerky, intermittent dynamics one has "cusps" or discontinuities in the auto-correlation function of the position and in the disorder as well [2,9]. The experimental device is the same used in [4,10]. A 30 mm wide paper sheet is peeled in half along its major plane between two rotating cylinders.…”

Section: Introductionmentioning

confidence: 99%

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Line Creep in Paper Peeling

Koivisto

Illa

Rosti

et al. 2010

EPJ Web of Conferences

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Abstract.We have studied experimentally the dynamics of the separation of a sheet of paper into two halves in a peeling configuration. The experimental setup consists of a peeling device, where a fracture front is driven along the plane of the paper, with a constant force. The theoretical picture is how an elastic line interacts with a random landscape of fracture toughness. We compare the results with theoretical simulations in several aspects. One recent finding concerns the autocorrelation function of the average front position. The data from the experiments produces so-called cusps or singularities in the correlation function, as predicted by the functional renormalization group theory for elastic lines. Comparisons with simulations with either a short range or a long range elastic kernel demonstrate that the latter agrees with the experimental observations, as expected.

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Section: Comparison To Simulationsmentioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%

“…The slope of the line is -1.6. The tensile experiment refers to a similar experiment but with a constant velocity, from [10].…”

Section: Methodsmentioning

confidence: 99%

Section: Comparison To Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Line Creep in Paper Peeling

Koivisto

Illa

Rosti

et al. 2010

EPJ Web of Conferences

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The duration-energy-size enigma for acoustic emission

Casals

Dahmen

Gou

et al. 2021

Sci Rep

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Acoustic emission (AE) measurements of avalanches in different systems, such as domain movements in ferroics or the collapse of voids in porous materials, cannot be compared with model predictions without a detailed analysis of the AE process. In particular, most AE experiments scale the avalanche energy E, maximum amplitude Amax and duration D as E ~ Amaxx and Amax ~ Dχ with x = 2 and a poorly defined power law distribution for the duration. In contrast, simple mean field theory (MFT) predicts that x = 3 and χ = 2. The disagreement is due to details of the AE measurements: the initial acoustic strain signal of an avalanche is modified by the propagation of the acoustic wave, which is then measured by the detector. We demonstrate, by simple model simulations, that typical avalanches follow the observed AE results with x = 2 and ‘half-moon’ shapes for the cross-correlation. Furthermore, the size S of an avalanche does not always scale as the square of the maximum AE avalanche amplitude Amax as predicted by MFT but scales linearly S ~ Amax. We propose that the AE rise time reflects the atomistic avalanche time profile better than the duration of the AE signal.

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Crackling noise and its dynamics in fracture of disordered media

Rosti¹,

Illa²,

Koivisto³

et al. 2009

J. Phys. D: Appl. Phys.

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Laboratory experiments on fracture yield ample evidence on the stick-slip or intermittent character of the dynamics of failure. We discuss the experimental evidence about such intermittency based on in particular acoustic emission (AE), the detection and analysis of ultrasound which reflects the elastic energy released in the fracture process. The main points are the statistical characterization of AE, the correlations that possibly exist in AE signatures or time series, and the universality of such features upon changing material and fracture setting (loading mode, loading rate and so forth). We also discuss implications on theory and on materials science via failure time or ultimate strength prediction.

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Line creep in paper peeling

Cited by 9 publications

References 38 publications

Line Creep in Paper Peeling

Line Creep in Paper Peeling

The duration-energy-size enigma for acoustic emission

Crackling noise and its dynamics in fracture of disordered media

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