Volume 137, Number 3, February 2022
|Number of page(s)||7|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||22 April 2022|
Crack and pull-off dynamics of adhesive, viscoelastic solids
1 Dept. of Materials Science and Engineering, Saarland University - 66123 Saarbrücken, Germany
2 PGI-1, FZ Jülich - Jülich, Germany
3 MultiscaleConsulting - Wolfshovener Str. 2, 52428 Jülich, Germany
Received: 21 October 2021
Accepted: 9 February 2022
When quickly detaching an elastomer from a counterface, viscoelasticity dramatically increases the perceived adhesion relative to its adiabatic or equilibrium value. Here, we report simulations on the sticking contact between a rigid cylinder and a viscoelastic half space revealing a maximum in the work of separation at intermediate pull-off velocities. Maximum tensile forces yet increase monotonically with the pull-off speed and the crack tip speed in accordance with the Persson-Brener approach. As predicted theoretically, the fracture mode transitions from interfacial crack propagation to quasi-uniform bond breaking with increasing range of adhesion.
© 2022 The author(s)
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