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Loïc Vanel - One of the best experts on this subject based on the ideXlab platform.
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Inertial and stick-slip regimes of unstable Adhesive Tape peeling
Soft Matter, 2016Co-Authors: Marie Julie Dalbe, Pierre-philippe Cortet, Stéphane Santucci, Richard Villey, Matteo Ciccotti, Loïc VanelAbstract:We present an experimental characterization of the detachment front unstable dynamics observed during the peeling of pressure sensitive Adhesives. We use an experimental set-up specifically designed to control the peeling angle θ and the peeled Tape length L, while peeling an Adhesive Tape from a flat substrate at a constant driving velocity V. High-speed imaging allows us to report the evolution of the period and amplitude of the front oscillations, as well as the relative durations of their fast and slow phases, as a function of the control parameters V, L and θ. Our study shows that, as the driving velocity or the peeling angle increases, the oscillations of the peeling front progressively evolve from genuine "stick-slip" oscillations, made of alternating long stick phases and very brief slip phases, to sinusoidal oscillations of amplitude twice the peeling velocity. We propose a model which, taking into account the peeling angle-dependent kinetic energy cost to accelerate and decelerate the peeled Tape, explains the transition from the "stick-slip" to the "inertial" regime of the dynamical instability. Using independent direct measurements of the effective fracture energy of the Adhesive-substrate joint, we show that our model quantitatively accounts for the two regimes of the unstable dynamics.
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Multiscale Stick-Slip Dynamics of Adhesive Tape Peeling
Physical Review Letters, 2015Co-Authors: Marie Julie Dalbe, Pierre-philippe Cortet, Loïc Vanel, Matteo Ciccotti, Stéphane SantucciAbstract:Using a high-speed camera, we follow the propagation of the detachment front during the peeling of an Adhesive Tape from a flat surface. In a given range of peeling velocity, this front displays a multiscale unstable dynamics, entangling two well-separated spatiotemporal scales, which correspond to microscopic and macroscopic dynamical stick-slip instabilities. While the periodic release of the stretch energy of the whole peeled ribbon drives the classical macro-stick-slip, we show that the micro-stick-slip, due to the regular propagation of transverse dynamic fractures discovered by Thoroddsen et al. [Phys. Rev. E 82, 046107 (2010)], is related to a high-frequency periodic release of the elastic bending energy of the Adhesive ribbon concentrated in the vicinity of the peeling front.
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Peeling-angle dependence of the stick-slip instability during Adhesive Tape peeling.
Soft matter, 2014Co-Authors: Marie Julie Dalbe, Stéphane Santucci, Loïc Vanel, Pierre-philippe CortetAbstract:The influence of peeling angle on the dynamics observed during the stick-slip peeling of an Adhesive Tape has been investigated. This study relies on a new experimental setup for peeling at a constant driving velocity while keeping constant the peeling angle and peeled Tape length. The thresholds of the instability are shown to be associated with a subcritical bifurcation and bistability of the system. The velocity onset of the instability is moreover revealed to strongly depend on the peeling angle. This could be the consequence of peeling angle dependance of either the fracture energy of the Adhesive-substrate joint or the effective stiffness at play between the peeling front and the point at which the peeling is enforced. The shape of the peeling front velocity fluctuations is finally shown to progressively change from typical stick-slip relaxation oscillations to nearly sinusoidal oscillations as the peeling angle is increased. We suggest that this transition might be controlled by inertial effects possibly associated with the propagation of the peeling force fluctuations through elongation waves in the peeled Tape.
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Intermittent stick-slip dynamics during the peeling of an Adhesive Tape from a roller
Physical Review E - Statistical Nonlinear and Soft Matter Physics, 2013Co-Authors: Pierre-philippe Cortet, Marie Julie Dalbe, Claudia Guerra, Stéphane Santucci, Caroline Cohen, Matteo Ciccotti, Loïc VanelAbstract:We study experimentally the fracture dynamics during the peeling at a constant velocity of a roller Adhesive Tape mounted on a freely rotating pulley. Thanks to a high speed camera, we measure, in an intermediate range of peeling velocities, high frequency oscillations between phases of slow and rapid propagation of the peeling fracture. This so-called stick-slip regime is well known as the consequence of a decreasing fracture energy of the Adhesive in a certain range of peeling velocity coupled to the elasticity of the peeled Tape. Simultaneously with stick slip, we observe low frequency oscillations of the Adhesive roller angular velocity which are the consequence of a pendular instability of the roller submitted to the peeling force. The stick-slip dynamics is shown to become intermittent due to these slow pendular oscillations which produce a quasistatic oscillation of the peeling angle while keeping constant the peeling fracture velocity (averaged over each stick-slip cycle). The observed correlation between the mean peeling angle and the stick-slip amplitude questions the validity of the usually admitted independence with the peeling angle of the fracture energy of Adhesives.
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Imaging the stick-slip peeling of an Adhesive Tape under a constant load
Journal of Statistical Mechanics: Theory and Experiment, 2007Co-Authors: Pierre-philippe Cortet, Matteo Ciccotti, Loïc VanelAbstract:Using a high speed camera, we study the peeling dynamics of an Adhesive Tape under a constant load with a special focus on the so-called stick-slip regime of the peeling. It is the first time that the very fast motion of the peeling point is imaged. The speed of the camera, up to $16000$ fps, allows us to observe and quantify the details of the peeling point motion during the stick and slip phases: stick and slip velocities, durations and amplitudes. First, in contrast with previous observations, the stick-slip regime appears to be only transient in the force controlled peeling. Additionally, we discover that the stick and slip phases have similar durations and that at high mean peeling velocity, the slip phase actually lasts longer than the stick phase. Depending on the mean peeling velocity, we also observe that the velocity change between stick and slip phase ranges from a rather sudden to a smooth transition. These new observations can help to discriminate between the various assumptions used in theoretical models for describing the complex peeling of an Adhesive Tape. The present imaging technique opens the door for an extensive study of the velocity controlled stick-slip peeling of an Adhesive Tape that will allow to understand the statistical complexity of the stick-slip in a stationary case.
Pierre-philippe Cortet - One of the best experts on this subject based on the ideXlab platform.
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Inertial and stick-slip regimes of unstable Adhesive Tape peeling
Soft Matter, 2016Co-Authors: Marie Julie Dalbe, Pierre-philippe Cortet, Stéphane Santucci, Richard Villey, Matteo Ciccotti, Loïc VanelAbstract:We present an experimental characterization of the detachment front unstable dynamics observed during the peeling of pressure sensitive Adhesives. We use an experimental set-up specifically designed to control the peeling angle θ and the peeled Tape length L, while peeling an Adhesive Tape from a flat substrate at a constant driving velocity V. High-speed imaging allows us to report the evolution of the period and amplitude of the front oscillations, as well as the relative durations of their fast and slow phases, as a function of the control parameters V, L and θ. Our study shows that, as the driving velocity or the peeling angle increases, the oscillations of the peeling front progressively evolve from genuine "stick-slip" oscillations, made of alternating long stick phases and very brief slip phases, to sinusoidal oscillations of amplitude twice the peeling velocity. We propose a model which, taking into account the peeling angle-dependent kinetic energy cost to accelerate and decelerate the peeled Tape, explains the transition from the "stick-slip" to the "inertial" regime of the dynamical instability. Using independent direct measurements of the effective fracture energy of the Adhesive-substrate joint, we show that our model quantitatively accounts for the two regimes of the unstable dynamics.
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Multiscale Stick-Slip Dynamics of Adhesive Tape Peeling
Physical Review Letters, 2015Co-Authors: Marie Julie Dalbe, Pierre-philippe Cortet, Loïc Vanel, Matteo Ciccotti, Stéphane SantucciAbstract:Using a high-speed camera, we follow the propagation of the detachment front during the peeling of an Adhesive Tape from a flat surface. In a given range of peeling velocity, this front displays a multiscale unstable dynamics, entangling two well-separated spatiotemporal scales, which correspond to microscopic and macroscopic dynamical stick-slip instabilities. While the periodic release of the stretch energy of the whole peeled ribbon drives the classical macro-stick-slip, we show that the micro-stick-slip, due to the regular propagation of transverse dynamic fractures discovered by Thoroddsen et al. [Phys. Rev. E 82, 046107 (2010)], is related to a high-frequency periodic release of the elastic bending energy of the Adhesive ribbon concentrated in the vicinity of the peeling front.
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Peeling-angle dependence of the stick-slip instability during Adhesive Tape peeling.
Soft matter, 2014Co-Authors: Marie Julie Dalbe, Stéphane Santucci, Loïc Vanel, Pierre-philippe CortetAbstract:The influence of peeling angle on the dynamics observed during the stick-slip peeling of an Adhesive Tape has been investigated. This study relies on a new experimental setup for peeling at a constant driving velocity while keeping constant the peeling angle and peeled Tape length. The thresholds of the instability are shown to be associated with a subcritical bifurcation and bistability of the system. The velocity onset of the instability is moreover revealed to strongly depend on the peeling angle. This could be the consequence of peeling angle dependance of either the fracture energy of the Adhesive-substrate joint or the effective stiffness at play between the peeling front and the point at which the peeling is enforced. The shape of the peeling front velocity fluctuations is finally shown to progressively change from typical stick-slip relaxation oscillations to nearly sinusoidal oscillations as the peeling angle is increased. We suggest that this transition might be controlled by inertial effects possibly associated with the propagation of the peeling force fluctuations through elongation waves in the peeled Tape.
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Intermittent stick-slip dynamics during the peeling of an Adhesive Tape from a roller
Physical Review E - Statistical Nonlinear and Soft Matter Physics, 2013Co-Authors: Pierre-philippe Cortet, Marie Julie Dalbe, Claudia Guerra, Stéphane Santucci, Caroline Cohen, Matteo Ciccotti, Loïc VanelAbstract:We study experimentally the fracture dynamics during the peeling at a constant velocity of a roller Adhesive Tape mounted on a freely rotating pulley. Thanks to a high speed camera, we measure, in an intermediate range of peeling velocities, high frequency oscillations between phases of slow and rapid propagation of the peeling fracture. This so-called stick-slip regime is well known as the consequence of a decreasing fracture energy of the Adhesive in a certain range of peeling velocity coupled to the elasticity of the peeled Tape. Simultaneously with stick slip, we observe low frequency oscillations of the Adhesive roller angular velocity which are the consequence of a pendular instability of the roller submitted to the peeling force. The stick-slip dynamics is shown to become intermittent due to these slow pendular oscillations which produce a quasistatic oscillation of the peeling angle while keeping constant the peeling fracture velocity (averaged over each stick-slip cycle). The observed correlation between the mean peeling angle and the stick-slip amplitude questions the validity of the usually admitted independence with the peeling angle of the fracture energy of Adhesives.
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Imaging the stick-slip peeling of an Adhesive Tape under a constant load
Journal of Statistical Mechanics: Theory and Experiment, 2007Co-Authors: Pierre-philippe Cortet, Matteo Ciccotti, Loïc VanelAbstract:Using a high speed camera, we study the peeling dynamics of an Adhesive Tape under a constant load with a special focus on the so-called stick-slip regime of the peeling. It is the first time that the very fast motion of the peeling point is imaged. The speed of the camera, up to $16000$ fps, allows us to observe and quantify the details of the peeling point motion during the stick and slip phases: stick and slip velocities, durations and amplitudes. First, in contrast with previous observations, the stick-slip regime appears to be only transient in the force controlled peeling. Additionally, we discover that the stick and slip phases have similar durations and that at high mean peeling velocity, the slip phase actually lasts longer than the stick phase. Depending on the mean peeling velocity, we also observe that the velocity change between stick and slip phase ranges from a rather sudden to a smooth transition. These new observations can help to discriminate between the various assumptions used in theoretical models for describing the complex peeling of an Adhesive Tape. The present imaging technique opens the door for an extensive study of the velocity controlled stick-slip peeling of an Adhesive Tape that will allow to understand the statistical complexity of the stick-slip in a stationary case.
Stéphane Santucci - One of the best experts on this subject based on the ideXlab platform.
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Inertial and stick-slip regimes of unstable Adhesive Tape peeling
Soft Matter, 2016Co-Authors: Marie Julie Dalbe, Pierre-philippe Cortet, Stéphane Santucci, Richard Villey, Matteo Ciccotti, Loïc VanelAbstract:We present an experimental characterization of the detachment front unstable dynamics observed during the peeling of pressure sensitive Adhesives. We use an experimental set-up specifically designed to control the peeling angle θ and the peeled Tape length L, while peeling an Adhesive Tape from a flat substrate at a constant driving velocity V. High-speed imaging allows us to report the evolution of the period and amplitude of the front oscillations, as well as the relative durations of their fast and slow phases, as a function of the control parameters V, L and θ. Our study shows that, as the driving velocity or the peeling angle increases, the oscillations of the peeling front progressively evolve from genuine "stick-slip" oscillations, made of alternating long stick phases and very brief slip phases, to sinusoidal oscillations of amplitude twice the peeling velocity. We propose a model which, taking into account the peeling angle-dependent kinetic energy cost to accelerate and decelerate the peeled Tape, explains the transition from the "stick-slip" to the "inertial" regime of the dynamical instability. Using independent direct measurements of the effective fracture energy of the Adhesive-substrate joint, we show that our model quantitatively accounts for the two regimes of the unstable dynamics.
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Multiscale Stick-Slip Dynamics of Adhesive Tape Peeling
Physical Review Letters, 2015Co-Authors: Marie Julie Dalbe, Pierre-philippe Cortet, Loïc Vanel, Matteo Ciccotti, Stéphane SantucciAbstract:Using a high-speed camera, we follow the propagation of the detachment front during the peeling of an Adhesive Tape from a flat surface. In a given range of peeling velocity, this front displays a multiscale unstable dynamics, entangling two well-separated spatiotemporal scales, which correspond to microscopic and macroscopic dynamical stick-slip instabilities. While the periodic release of the stretch energy of the whole peeled ribbon drives the classical macro-stick-slip, we show that the micro-stick-slip, due to the regular propagation of transverse dynamic fractures discovered by Thoroddsen et al. [Phys. Rev. E 82, 046107 (2010)], is related to a high-frequency periodic release of the elastic bending energy of the Adhesive ribbon concentrated in the vicinity of the peeling front.
-
Peeling-angle dependence of the stick-slip instability during Adhesive Tape peeling.
Soft matter, 2014Co-Authors: Marie Julie Dalbe, Stéphane Santucci, Loïc Vanel, Pierre-philippe CortetAbstract:The influence of peeling angle on the dynamics observed during the stick-slip peeling of an Adhesive Tape has been investigated. This study relies on a new experimental setup for peeling at a constant driving velocity while keeping constant the peeling angle and peeled Tape length. The thresholds of the instability are shown to be associated with a subcritical bifurcation and bistability of the system. The velocity onset of the instability is moreover revealed to strongly depend on the peeling angle. This could be the consequence of peeling angle dependance of either the fracture energy of the Adhesive-substrate joint or the effective stiffness at play between the peeling front and the point at which the peeling is enforced. The shape of the peeling front velocity fluctuations is finally shown to progressively change from typical stick-slip relaxation oscillations to nearly sinusoidal oscillations as the peeling angle is increased. We suggest that this transition might be controlled by inertial effects possibly associated with the propagation of the peeling force fluctuations through elongation waves in the peeled Tape.
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Intermittent stick-slip dynamics during the peeling of an Adhesive Tape from a roller
Physical Review E - Statistical Nonlinear and Soft Matter Physics, 2013Co-Authors: Pierre-philippe Cortet, Marie Julie Dalbe, Claudia Guerra, Stéphane Santucci, Caroline Cohen, Matteo Ciccotti, Loïc VanelAbstract:We study experimentally the fracture dynamics during the peeling at a constant velocity of a roller Adhesive Tape mounted on a freely rotating pulley. Thanks to a high speed camera, we measure, in an intermediate range of peeling velocities, high frequency oscillations between phases of slow and rapid propagation of the peeling fracture. This so-called stick-slip regime is well known as the consequence of a decreasing fracture energy of the Adhesive in a certain range of peeling velocity coupled to the elasticity of the peeled Tape. Simultaneously with stick slip, we observe low frequency oscillations of the Adhesive roller angular velocity which are the consequence of a pendular instability of the roller submitted to the peeling force. The stick-slip dynamics is shown to become intermittent due to these slow pendular oscillations which produce a quasistatic oscillation of the peeling angle while keeping constant the peeling fracture velocity (averaged over each stick-slip cycle). The observed correlation between the mean peeling angle and the stick-slip amplitude questions the validity of the usually admitted independence with the peeling angle of the fracture energy of Adhesives.
Marie Julie Dalbe - One of the best experts on this subject based on the ideXlab platform.
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Inertial and stick-slip regimes of unstable Adhesive Tape peeling
Soft Matter, 2016Co-Authors: Marie Julie Dalbe, Pierre-philippe Cortet, Stéphane Santucci, Richard Villey, Matteo Ciccotti, Loïc VanelAbstract:We present an experimental characterization of the detachment front unstable dynamics observed during the peeling of pressure sensitive Adhesives. We use an experimental set-up specifically designed to control the peeling angle θ and the peeled Tape length L, while peeling an Adhesive Tape from a flat substrate at a constant driving velocity V. High-speed imaging allows us to report the evolution of the period and amplitude of the front oscillations, as well as the relative durations of their fast and slow phases, as a function of the control parameters V, L and θ. Our study shows that, as the driving velocity or the peeling angle increases, the oscillations of the peeling front progressively evolve from genuine "stick-slip" oscillations, made of alternating long stick phases and very brief slip phases, to sinusoidal oscillations of amplitude twice the peeling velocity. We propose a model which, taking into account the peeling angle-dependent kinetic energy cost to accelerate and decelerate the peeled Tape, explains the transition from the "stick-slip" to the "inertial" regime of the dynamical instability. Using independent direct measurements of the effective fracture energy of the Adhesive-substrate joint, we show that our model quantitatively accounts for the two regimes of the unstable dynamics.
-
Multiscale Stick-Slip Dynamics of Adhesive Tape Peeling
Physical Review Letters, 2015Co-Authors: Marie Julie Dalbe, Pierre-philippe Cortet, Loïc Vanel, Matteo Ciccotti, Stéphane SantucciAbstract:Using a high-speed camera, we follow the propagation of the detachment front during the peeling of an Adhesive Tape from a flat surface. In a given range of peeling velocity, this front displays a multiscale unstable dynamics, entangling two well-separated spatiotemporal scales, which correspond to microscopic and macroscopic dynamical stick-slip instabilities. While the periodic release of the stretch energy of the whole peeled ribbon drives the classical macro-stick-slip, we show that the micro-stick-slip, due to the regular propagation of transverse dynamic fractures discovered by Thoroddsen et al. [Phys. Rev. E 82, 046107 (2010)], is related to a high-frequency periodic release of the elastic bending energy of the Adhesive ribbon concentrated in the vicinity of the peeling front.
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Peeling-angle dependence of the stick-slip instability during Adhesive Tape peeling.
Soft matter, 2014Co-Authors: Marie Julie Dalbe, Stéphane Santucci, Loïc Vanel, Pierre-philippe CortetAbstract:The influence of peeling angle on the dynamics observed during the stick-slip peeling of an Adhesive Tape has been investigated. This study relies on a new experimental setup for peeling at a constant driving velocity while keeping constant the peeling angle and peeled Tape length. The thresholds of the instability are shown to be associated with a subcritical bifurcation and bistability of the system. The velocity onset of the instability is moreover revealed to strongly depend on the peeling angle. This could be the consequence of peeling angle dependance of either the fracture energy of the Adhesive-substrate joint or the effective stiffness at play between the peeling front and the point at which the peeling is enforced. The shape of the peeling front velocity fluctuations is finally shown to progressively change from typical stick-slip relaxation oscillations to nearly sinusoidal oscillations as the peeling angle is increased. We suggest that this transition might be controlled by inertial effects possibly associated with the propagation of the peeling force fluctuations through elongation waves in the peeled Tape.
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Intermittent stick-slip dynamics during the peeling of an Adhesive Tape from a roller
Physical Review E - Statistical Nonlinear and Soft Matter Physics, 2013Co-Authors: Pierre-philippe Cortet, Marie Julie Dalbe, Claudia Guerra, Stéphane Santucci, Caroline Cohen, Matteo Ciccotti, Loïc VanelAbstract:We study experimentally the fracture dynamics during the peeling at a constant velocity of a roller Adhesive Tape mounted on a freely rotating pulley. Thanks to a high speed camera, we measure, in an intermediate range of peeling velocities, high frequency oscillations between phases of slow and rapid propagation of the peeling fracture. This so-called stick-slip regime is well known as the consequence of a decreasing fracture energy of the Adhesive in a certain range of peeling velocity coupled to the elasticity of the peeled Tape. Simultaneously with stick slip, we observe low frequency oscillations of the Adhesive roller angular velocity which are the consequence of a pendular instability of the roller submitted to the peeling force. The stick-slip dynamics is shown to become intermittent due to these slow pendular oscillations which produce a quasistatic oscillation of the peeling angle while keeping constant the peeling fracture velocity (averaged over each stick-slip cycle). The observed correlation between the mean peeling angle and the stick-slip amplitude questions the validity of the usually admitted independence with the peeling angle of the fracture energy of Adhesives.
Matteo Ciccotti - One of the best experts on this subject based on the ideXlab platform.
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Inertial and stick-slip regimes of unstable Adhesive Tape peeling
Soft Matter, 2016Co-Authors: Marie Julie Dalbe, Pierre-philippe Cortet, Stéphane Santucci, Richard Villey, Matteo Ciccotti, Loïc VanelAbstract:We present an experimental characterization of the detachment front unstable dynamics observed during the peeling of pressure sensitive Adhesives. We use an experimental set-up specifically designed to control the peeling angle θ and the peeled Tape length L, while peeling an Adhesive Tape from a flat substrate at a constant driving velocity V. High-speed imaging allows us to report the evolution of the period and amplitude of the front oscillations, as well as the relative durations of their fast and slow phases, as a function of the control parameters V, L and θ. Our study shows that, as the driving velocity or the peeling angle increases, the oscillations of the peeling front progressively evolve from genuine "stick-slip" oscillations, made of alternating long stick phases and very brief slip phases, to sinusoidal oscillations of amplitude twice the peeling velocity. We propose a model which, taking into account the peeling angle-dependent kinetic energy cost to accelerate and decelerate the peeled Tape, explains the transition from the "stick-slip" to the "inertial" regime of the dynamical instability. Using independent direct measurements of the effective fracture energy of the Adhesive-substrate joint, we show that our model quantitatively accounts for the two regimes of the unstable dynamics.
-
Multiscale Stick-Slip Dynamics of Adhesive Tape Peeling
Physical Review Letters, 2015Co-Authors: Marie Julie Dalbe, Pierre-philippe Cortet, Loïc Vanel, Matteo Ciccotti, Stéphane SantucciAbstract:Using a high-speed camera, we follow the propagation of the detachment front during the peeling of an Adhesive Tape from a flat surface. In a given range of peeling velocity, this front displays a multiscale unstable dynamics, entangling two well-separated spatiotemporal scales, which correspond to microscopic and macroscopic dynamical stick-slip instabilities. While the periodic release of the stretch energy of the whole peeled ribbon drives the classical macro-stick-slip, we show that the micro-stick-slip, due to the regular propagation of transverse dynamic fractures discovered by Thoroddsen et al. [Phys. Rev. E 82, 046107 (2010)], is related to a high-frequency periodic release of the elastic bending energy of the Adhesive ribbon concentrated in the vicinity of the peeling front.
-
Intermittent stick-slip dynamics during the peeling of an Adhesive Tape from a roller
Physical Review E - Statistical Nonlinear and Soft Matter Physics, 2013Co-Authors: Pierre-philippe Cortet, Marie Julie Dalbe, Claudia Guerra, Stéphane Santucci, Caroline Cohen, Matteo Ciccotti, Loïc VanelAbstract:We study experimentally the fracture dynamics during the peeling at a constant velocity of a roller Adhesive Tape mounted on a freely rotating pulley. Thanks to a high speed camera, we measure, in an intermediate range of peeling velocities, high frequency oscillations between phases of slow and rapid propagation of the peeling fracture. This so-called stick-slip regime is well known as the consequence of a decreasing fracture energy of the Adhesive in a certain range of peeling velocity coupled to the elasticity of the peeled Tape. Simultaneously with stick slip, we observe low frequency oscillations of the Adhesive roller angular velocity which are the consequence of a pendular instability of the roller submitted to the peeling force. The stick-slip dynamics is shown to become intermittent due to these slow pendular oscillations which produce a quasistatic oscillation of the peeling angle while keeping constant the peeling fracture velocity (averaged over each stick-slip cycle). The observed correlation between the mean peeling angle and the stick-slip amplitude questions the validity of the usually admitted independence with the peeling angle of the fracture energy of Adhesives.
-
Imaging the stick-slip peeling of an Adhesive Tape under a constant load
Journal of Statistical Mechanics: Theory and Experiment, 2007Co-Authors: Pierre-philippe Cortet, Matteo Ciccotti, Loïc VanelAbstract:Using a high speed camera, we study the peeling dynamics of an Adhesive Tape under a constant load with a special focus on the so-called stick-slip regime of the peeling. It is the first time that the very fast motion of the peeling point is imaged. The speed of the camera, up to $16000$ fps, allows us to observe and quantify the details of the peeling point motion during the stick and slip phases: stick and slip velocities, durations and amplitudes. First, in contrast with previous observations, the stick-slip regime appears to be only transient in the force controlled peeling. Additionally, we discover that the stick and slip phases have similar durations and that at high mean peeling velocity, the slip phase actually lasts longer than the stick phase. Depending on the mean peeling velocity, we also observe that the velocity change between stick and slip phase ranges from a rather sudden to a smooth transition. These new observations can help to discriminate between the various assumptions used in theoretical models for describing the complex peeling of an Adhesive Tape. The present imaging technique opens the door for an extensive study of the velocity controlled stick-slip peeling of an Adhesive Tape that will allow to understand the statistical complexity of the stick-slip in a stationary case.
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Complex dynamics in the peeling of an Adhesive Tape
International Journal of Adhesion and Adhesives, 2004Co-Authors: Matteo Ciccotti, Bruno Giorgini, D. Vallet, Michel BarquinsAbstract:Abstract Fracture is a very complicated phenomenon and its dynamics is not well described up to now by a consistent physical and/or mathematical model. In this paper we synthetically present the main experimental and theoretical results for the peeling of an Adhesive Tape, i.e. a viscoelastic dissipative system, viewed as a two-dimensional fracture propagation. From recent peeling experiments, using a common Adhesive Tape, the emergence of hierarchical structures in a broad range of time scales was observed in a definite region of the stick–slip regime, and this is one the indicators commonly used speaking of complex systems.
