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Mike Ciavarella's blog

A very simple estimate of adhesion of hard solids with rough surfaces based on a bearing area model

Submitted by Mike Ciavarella on
research
adhesion
rough surfaces
dmt

"A very simple estimate of adhesion of hard solids with rough surfaces based on a bearing area model" is in press in Meccanica, can be viewed at http://rdcu.be/s0lV Abstract In the present note, we suggest a single-line equation estimate for adhesion between elastic(hard) rough solids with Gaussian multiple scales of roughness.

Generalized definition of “crack-like” notches to finite life and SN curve transition from “crack-like” to “blunt notch” behavior

Submitted by Mike Ciavarella on
research
crack-like notches
sn curves
basquin
wohler
critical distance method
Engineering Fracture Mechanics

Available online 29 April 2017

In Press, Accepted Manuscript — Note to users

International Workshop "Adhesion and Friction: Simulation, Experiment, Applications" TU Berlin, 13-16 November 2017

Submitted by Mike Ciavarella on
conference

Dear colleagues,

enclosed you find the first announcement of the International Workshop on
__________________________________________
Adhesion and Friction: 
Simulation, Experiment, 
Applications 

to be held from November 13 - 16, 2017 
at the Technische Universität Berlin.

http://www.reibungsphysik.tu-berlin.de/index.php?id=85856

Susmel-Papuga sharp controversy about multiaxial fatigue criteria

Submitted by Mike Ciavarella on
research
Fatigue
multiaxial fatigue
Failure Criteria

I recently came across this sharp controversy between Papuga and Susmel on multiaxial fatigue criteria.  Papuga accuses Susmel of "picking up" data that he likes from the literature, disregarding other data... And of having some constants in the criteria that are set a posteriori as fitting parameters.   Do you know how this ended up?  Anyone else partecipated to the debate?

 

GADeS Summer School on Stability and Bifurcation of Dynamical Systems: Theoretical Aspects and Applications

Submitted by Mike Ciavarella on
education
summer school
dynamics
stability
bifurcation

Dinamica e stabilità

First announcement of
GADeS Summer School on

Stability and Bifurcation of Dynamical Systems:
Theoretical Aspects and Applications

July 3-7, 2017, Savona, Italy

 

A simple finding on variable amplitude (Gassner) fatigue SN curves obtained using Miner’s rule for unnotched or notched specimen

Submitted by Mike Ciavarella on
research
Fatigue
variable amplitude
notches
critical distance method

We provide a very simple result for a problem which has been often neglected (variable amplitude loading) in academia, but which is of paramount importance in real engineering situations, where fatigue is almost never "constant amplitude".

We found few cases where we could check this extremely simple result, but it worked very well.  We would welcome further verifications.

The paper is in press here.

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