Jim Barber and I just got accepted this paper in JMPS, and it is also already available on Arxiv. We found a remarkably simple closed form solution for adhesion on orthotropic materials in the planes of symmetry. This shows adhesion can increase significantly due to anisotropy, namely the JKR solution continues to hold in the sense of mean elastic modulus, but the prefactor can grow without limit. We expect applications in crystals indentation, but also in locomotion in biological world.
I would like to bring to your attention the following minisymposium that is organized as part of the NCTAM 17 (Michigan State University, June 15-20, 2014)
Several recent papers have reported measurements of adhesion energy between graphene and other materials (e.g., Si/SiOx and copper) [1-3]. Like thin films, many experimental methods may be adopted to measure the interfacial properties of graphene, such as the pressurized blister test  and the double-cantilever beam test . The challenges lie in the handling of atomically thin membranes and analysis/interpretation of the data.
Nanoscale Interfacial Friction and Adhesion on Supported versus Suspended Monolayer and Multilayer GrapheneSubmitted by Teng Li on Wed, 2013-01-09 07:14.
The fatigue behavior of Ag films on polyethyleneterephthalate substrates was studied using electrical resistance measurements.
Scanning electron microscopy images showed two types of failure: typical fatigue failure with extrusion–intrusion pairs, and ductile
failure with local necking. Once through-thickness cracks are formed in the metal layer, cracks propagate and the resistance increases abruptly for both failure modes. The effect of adhesion on fatigue life is discussed in terms of concurrent delamination, crack initiation and propagation.
The paper has been published in Scripta Materialia and can be downloaded from:
One of the papers from the 'past' (but still quite actual...I think) and maybe of some interest to various communities.
A system in which one adherend had two types of surface treatment was tested using a wedge test.
Simple polishing and polishing with subsequent sandblasting were the
treatments used, with a distinct straight line, perpendicular to the sample edges,
separating the two. Despite the clear-cut difference in surface treatment, smooth
transitions in crack growth speed were noted. This can be explained by the
existence of a curved crack front, encroaching gradually on one surface-treated
Two postdoctoral positions are available in the group of Prof. M. Urbakh in lively Tel-Aviv. Topics are centered around nano and micro-scale tribology (friction, dissipation, adhesion, wear) involving theory, modeling, and computer simulation of frictional and nonlinear
Adhesion has long been an important issue for mechanics and
many other disciplines. Its influence spans macro-, micro-, nano- and molecular
scales. When size goes down, adhesion plays a more and more significant role.
Many important technologies attribute to adhesion, such as transfer printing
for advanced microfabrication, super adhesives inspired by gecko foot hairs,
and self-assembly. Adhesion also has strong implications on the behavior of
nanomaterials (such as nanotubes and graphenes) and biological systems (such as
cells). This minisymposium "Mechanics of Adhesion" is to provide a
Understanding the adhesion between graphene and other materials is crucial for achieving more reliable graphene-based applications in electronic devices and nanocomposites. The ultra-thin profile of graphene, however, poses significant challenge to direct measurement of its adhesion property using conventional approaches. We show that there is a strong correlation between the morphology of graphene on a compliant substrate with patterned surface and the graphene-substrate adhesion.
Adhesion has long been an important issue for mechanics and many other disciplines. Its influence spans macro-, micro-, nano- and molecular scales. When size goes down, adhesion plays a more and more significant role. Many important technologies attribute to adhesion, such as transfer printing for advanced microfabrication, super adhesives inspired by gecko foot hairs, and self-assembly. Adhesion also has strong implications on the behavior of nanomaterials (such as nanotubes and graphenes) and biological system (such as cells). This minisymposium "Mechanics of Adhesion" is to provide a forum of discussion and communication, for researchers working on and interested in adhesion related subjects.
I would like to bring your attention to the Gordon Research Conference (GRC) on Adhesion Science, which will be held from July 24 – 29, 2011, at Bates College, Lewiston, Maine, U.S.A. This conference is chaired by Chung-Yuen Hui at Cornell University and Kenneth Shull at Northwestern University.
Constitutive relations, 2-D vs. 3-D. The starting point for modeling cellular membranes is the constitutive relations in 2-D space. It is important to set up the corresponding equations directly in two dimensions rather than to consider them as an asymptotic limit of three-dimensional relationships, like it is done in the shell theory. The main reason for the direct 2-D relations is that 3-D continuum approaches are not applicable to membranes whose thickness in on the order of magnitude of the dimension of a single molecule.
The Graduate School MUSIC (Multiscale Methods for Interface Coupling) invites to its first Summer School on Multiscale and Multiphysics Modelling of Interfaces at Leibniz Universitaet Hannover, Germany, from 15 to 17 September 2010.
Welcome to February 2010 Journal Club! This month, I look forward to a lively discussion on the mechanics of structured and patterned interfaces in which geometry is used to tailor adhesion. Much of the work in this area has been inspired by a variety of animals and insects that have feet covered with small structures (often hierarchical and sub-micrometer in size at the end) that allow them to strongly adhere to a broad range of surfaces. The best known example is the Tokay Gecko (Gekko gecko), which can achieve an adhesion force much greater than its body weight and can quickly form and separate adhesive contacts between their feet and a range of smooth and rough surfaces. In the journal club this month I do not want to delve into the mechanics of Gecko a
Location: Colby-Sawyer College, New London, NH, United States
Sunday, July 26, 2009 - Friday, July 31, 2009
Chair: Jeffrey T Koberstein (Columbia University)
Vice Chair: Chung-Yuen Hui (Cornell University)
Web Site: http://www.grc.org/programs.aspx?year=2009&program=adhesion
Online Application: http://www.grc.org/application.aspx?id=13784
The Adhesion Society will hold its 32nd Annual Meeting in Savannah, GA February 15-18, 2009; uniting chemists, physicists, mechanists, engineers, and biologists concerned with the design and characterization of materials interfaces and their associated property of adhesion. Adhesion and interfacial constrol are key to the development of nano- and bio- based technologies as well structural and cosmetic applications that influence society in everyday life.
A Post-Doc Position is avalaible in Bio-Mimetic Adhesive Interfaces (EbioAdI) at the University of Mons-Hanaut, Belgium
Please note that a post-doc position on stresses and adhesion in optical multilayers is open. The position is for 2-years shared between SVI (Paris) and Phymat (Poitiers).
Link to a virus-free MS Word description of the position:
For further details and applications (cover letter, CV, statement of research interests):
A post-doc position on multiscale simulation of cell contact and adhesion shall be available this coming Fall at UC Berkeley. We are seeking for a person who has experience and background on finite element computations, especially in cell contact/adhesion modeling and simulation or finite deformation simulations.
Anyone who is interested in the position please send an email, resume, and reference to firstname.lastname@example.org
With the beginning of the year 2008, the iMechanica journal club moves to two topics per month. This first topic will be highlighted here for 1-14 January, with the next topic starting on 15 January.
There has been much recent buzz about biology and nature, and about materials and structures that are “biomimetic” or “bio-inspired”. A key distinction here, when compared with fields like tissue engineering, is that although information is obtained from natural objects, including biological tissues, the end-applications are industrial and not necessarily biomedical.
It seems there are quite a few experimental studies [1,2] on the fracture properties of porous materials, like nanoporous low-k dielectrics, as a function of porosity. Can anyone point out some references on the theoretical part, like the available models, computational methods or analytical approaches that can capture microstructure information, including porosity, pore geometry etc. Interface delamination of porous materials is also of interest. Thanks.