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Sächsisches Institut für Oberflächenmechanik

Endlos berührbar - Strukturelle Lösungen für die nächste Generation von Schichten für den Verschleißschutz

August 2012:

Nachdem wir eingeladen wurde, ein „full length paper“ für die WOM 2013 (International Conference on Wear of Materials) beizutragen, reichten wir einen neue Ansatz für Abriebssimulationen ein, dessen Prinzip im folgenden Flow Chart skizziert wird:

Rein physikalische Charakterisierung und Optimierung verschleißarmer Schichten mit Hilfe generischer Tribo-Parameter

Januar 2013:

Leider hat man das Paper vergessen und erst durch einen übereilten “proper review process” geschickt, als der Autor wissen wollte, warum er noch nichts vom Vorstand der WOM gehört hat.

Aus der Antwort der WOM vom 24. Januar 2013:

“Apologies for the confusion caused. I checked the whole history and now I have asked the concerned person to assign it to the Editor for reviewing.”

Sehr wenige Stunden später ...

... erhielten wir die Entscheidung des “review process”:

Reviewers' comments:

Comments from the Subject Matter Editor for Wear Modeling:

I am rejecting your paper because it is not ready for the usual Wear of Materials audiences.

It is on a fascinating topic since we have taken greater interest in wear modeling of late. Thank you for considering us as an appropriate forum for your views.

Was soll man zu so einer vorbildlichen Überprüfung sagen? Die WOM legt die Latte wirklich sehr hoch.

Comments from the general editor:

Any new theory or approach to wear science should be generally accompanied by a series of physical experiments that validate its predictive ability. In this case, the reviewer felt that more substantial verification is required for acceptance. Furthermore, the author has not established the relationship between quasi-static characteristics, like hardness, and highly dynamic characteristics like wear. Where is the role of debris particles? How are strain rate effects taken into account? How is the wear of the system (both the softer and harder of the materials) accounted for. In addition, from an editorial point of view, there were too many figures with tiny, almost unreadable labels. There are also quite a few spelling and grammar errors in this paper. That also led to not recommending acceptance.

Es ist absolut akzeptabel, dass die Arbeit nicht als veröffentlichungsreif angesehen wurde. Es sind jedoch die Kommentare des Hauptredakteurs, die unserer Meinung nach für die breite Öffentlichkeit von Interesse sind, weshalb wir entschieden haben, diese vorgebrachten Fragen öffentlich zu beantworten.

Any new theory or approach to wear science should be generally accompanied by a series of physical experiments that validate its predictive ability. In this case, the reviewer felt that more substantial verification is required for acceptance.

Diesbezüglich möchten wir lediglich auf einige vielleicht interessante Beiträge zur diesjährigen ICMCTF verweisen:

Es gab auch zwei experimentelle Beiträge zur WOM, aber eine wurde abgewiesen und die andere wurde zurück gezogen, als der Autor vom Umgang mit meiner Arbeit erfuhr.

Furthermore, the author has not established the relationship between quasi-static characteristics, like hardness, and highly dynamic characteristics like wear.

It was perhaps not clearly enough explained in the paper that the process of wear is to be considered as a multi-physical multi body (asperity) ensemble of contact situation with each having its own geometry, load conditions (including tilting, normal, lateral, twisting loads plus frictional caused temperature fields) and – in complex cases with debris – also multiple time scales, meaning varies parts of the global wear contact are running in their own speed.
It is due to the similarity of the governing differential equations that having found the solution for the contact problem immediately gives us the solution for the temperature field or any other “diffusion-like” problem.

Beside that:
The connection between non-physical parameters (like hardness) toward wear was never the intention of the paper. In fact, there is no such connection – strictly speaking – and it is utter nonsense to seek such or even demand it in a serious scientific paper … and the author will not bother to explain it to duffers who are from the scientific age of the dinosaurs. Something not generic like hardness simply cannot – not generally – be extended or applied to a dynamic process like wear.
To put it metaphorically: Somebody who intends to model a driving car will probably not try to start with Newton’s third law but uses his second one instead.

Where is the role of debris particles?

They are just adding up to the complex jumble of contact situations mentioned above.

How are strain rate effects taken into account?

By applying either piecewise 3-parameter models or solving the nonlinear governing system of equations with time-stress- and strain-dependent material parameters.

How is the wear of the system (both the softer and harder of the materials) accounted for?

By decomposition limits extracted from the first principle approaches as described in the paper (bit short probably). These limits have then to be compared with the fields obtained in the multiple complex contact model. The concepts of “softer” or “harder” have nothing to do with this general approach.
Even though, in principle, we have now said what is of need, we explicitly point out, that wear cannot be connected by a simple kd-value (simple Archard’s law) to the deformation or stress field. Instead, in the most simple case, the wear is a tensor, coupling with wear-moduli to every stress component in a fully covariant manner:

Wearij=kijkl Stresskl

Was bedeutet diese Formel? In der Veröffentlichung Endlessly Touchable – the Next Generation of Surface and Coating Optimization erfahren Sie mehr!

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