Sharp knives – high friction
Trying to slice a tomato into thin slices with a dull knife can get a little scary. The harder the knife must be pressed downward before the skin is broken is directly related to the acceleration the knife experiences as...
Knowing the strength of adhesion
How can flies walk on the window glass upside down? How can geckos climb walls and trees? It looks like a simple question, but it is hard to answer. The secret is that flies and geckos, and many other living species can control the ability to...
A very simple estimate of adhesion with rough surfaces based on a bearing area model
Here we present an abstract to the paper addressing a simplified model for adhesion between hard rough solids. Abstract In the present note, we suggest a single-line equation estimate for adhesion between elastic (hard) rough solids with Gaussian multiple scales...
On the history of elastohydrodynamics
Here we present an abstract to a paper devoted to the history of eastohydrodynamic theory and his founder - Alexander Mohrenstein-Ertel. This paper discusses in detailes the peculiar biography of the scientist and the early years of the theory development. On the history...
Contact mechanics challenge results: a follow up discussion