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adhesion; contact mechanics; bioinspired adhesion; nanolayers; microlayers

How contact area decreases under shear load in soft bodies?

Submitted by Antonio Papangelo on

A very good paper has just been published in JMPS by  J.C. Mergel, J. Scheibert, R.A. Sauer "Contact with coupled adhesion and friction: Computational framework, applications, and new insights". it shows the results of numerical simulations with soft bodies sheared by a tangential force. There is a vivacious discussion in Literature if the contact area reduces due to adhesion or due to large deformation.

Adhesion of multilayered materials

Submitted by Antonio Papangelo on

Adhesion is a key factor in many tribological processes, especially wear. We generalize a recent formulation for the indentation of a multilayered material using an efficient integral transform method, to the case of adhesion, using a simple energetic transformation in the JKR regime. Then, we specialize the study for the geometry of the Surface Force Apparatus, which consists of two thin layers on a substrate, where the intermediate layer is softer than the other two. We find the pull-off force under "force control" (i.e.

Bio-inspired solution for optimal adhesive performance

Submitted by Antonio Papangelo on

In recent years there has been a growing interest into high performance bioinspired adhesives. This communication focuses on the adhesive behavior of a rigid cylinder that indents an elastic layer coated on a rigid substrate. With the assumption of short range adhesive interactions (JKR type) the adhesive solution is obtained very easily starting from the adhesiveless one.

A question regarding applying the boundary conditions in thin film peeling

Submitted by Gouravaraju on
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Hello all,

As is my understanding that, in analytical models such as "Kendall Peeling Model", when they talk about peeling angle it is the angle at which the peeling force is applied (or am I wrong?). But when it comes to FE analysis, if we displace one end of the film at an angle by applying displacement boundary conditions on that end, the resulting forces are not along the same direction of the displacements. So, I am confused as to how to compare the FE results with that of the analytical models.

Thank you.