Difference between revisions of "A simple model for the dynamics of adhesive failure"

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== Summary ==
 
== Summary ==
  
This paper describes a simple model of adhesive failure used to describe the physical processes that result in bimodal nature of tack curves in experiments. They consider two parallel plates attached to each other by an array of <math> N(t)</math> nonlinear springs, which dissociate as the plates are pulled apart at a constant velocity. They describe the dissociation rate by the equation:
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This paper describes a simple model of adhesive failure used to describe the physical processes that result in bimodal nature of stress/strain curves in experiments. They consider two parallel plates attached to each other by an array of <math> N(t)</math> nonlinear springs, which dissociate as the plates are pulled apart at a constant velocity. They describe the dissociation rate by the equation:
  
 
<math>  k(t)=k_{0}\exp\left(\frac{\gamma vt}{bL(1-vt/L)}\right)</math>
 
<math>  k(t)=k_{0}\exp\left(\frac{\gamma vt}{bL(1-vt/L)}\right)</math>
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== Results ==
 
== Results ==
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[[Topic2fig.JPG]]

Revision as of 19:37, 18 September 2009

(under construction)

Original Entry: Ian Burgess Fall 2009


Keywords

References

D. Vella, L. Mahadevan, "A simple model for the dynamics of adhesive failure" Langmuir 22, 163 (2006).

Summary

This paper describes a simple model of adhesive failure used to describe the physical processes that result in bimodal nature of stress/strain curves in experiments. They consider two parallel plates attached to each other by an array of <math> N(t)</math> nonlinear springs, which dissociate as the plates are pulled apart at a constant velocity. They describe the dissociation rate by the equation:

<math> k(t)=k_{0}\exp\left(\frac{\gamma vt}{bL(1-vt/L)}\right)</math>

where <math> \gamma</math> is a lengthscale associated with the adhesive's bond potential, <math> k_{0}</math> is the dissociation rate when no force is applied, v is the velocity at which the plates are being pulled apart, and b and L are lengths associated with the polymer chain in the adhesive. <math> N(t)</math> is then described by the equation,

<math> \frac{\mathrm{d}N}{\mathrm{d}t}=-k(t)N</math>

Results

Topic2fig.JPG