An investigation of scratch testing of silicone elastomer coatings with a thickness gradient

2014

Coatings

Self Cite

Usually, some severe efforts are required to obtain tribological parameters like Archard's wear depth parameter k d . Complex tribological experiments have to be performed and analyzed. The paper features an approach where such parameters are extracted from effective interaction potentials in combination with more physical-oriented measurements, such as Nanoindentation and physical scratch. Thereby, the effective potentials are built up and fed from such tests. By using effective material potentials one can derive critical loading situations leading to failure (decomposition strength) for any contact situation. A subsequent connection of these decomposition or failure states with the corresponding stress or strain distributions allows the development of rather comprehensive tribological parameter models, applicable in wear and fatigue simulations, as demonstrated in this work. From this, a new relatively general wear model has been developed on the basis of the effective indenter concept by using the extended Hertzian approach for a great variety of loading situations. The models do not only allow to analyze certain tribological experiments, such as the well known pin-on disk test or the more recently developed nano-fretting test, but also to forward simulate such tests and even give hints for structured optimization or result in better component life-time prediction. The work will show how the procedure has to be applied in general and a small selection of practical examples will be presented.

Section: The Extension Of the Oliver And Pharr Methods To Analyze Nanomentioning

confidence: 99%

Completely Analytical Tools for the Next Generation of Surface and Coating Optimization

2014

Coatings

Self Cite

“…The next thing of need now is a time dependent analysis method for ordinary quasi-static nanoindentation tests (e.g. [35] with application [36]). Our approach will be of the following kind [25]: (18) with t denoting the time.…”

Section: The Extension Of the Oliver And Pharr Methods To Analyze Nanomentioning

confidence: 99%

About the Identification of Generic Tribological Parameters, Sophisticated Completely Analytical Contact Modelling and the Effective Indenter Concept Applied to a Comprehensive 3d Incremental Wear and Fretting Model for Layered Surfaces

Proceedings of the 3rd South-East European Conference on Computational Mechanics (SEECCM III)

2014

Section: The Extension Of the Oliver And Pharr Methods To Analyze Nan...mentioning

confidence: 99%

About the Identification of Generic Tribological Parameters, Sophisticated Completely Analytical Contact Modeling and the Effective Indenter Concept Applied to a Comprehensive 3d Incremental Wear and Fretting Model for Layered Surfaces

Proceedings of the 3rd South-East European Conference on Computational Mechanics – SEECCM III

2013

Self Cite

To obtain tribological parameters like Archard's wear depth parameter kd usually requires some severe effort in performing and analyzing complex tribological experiments. The paper features an approach where such parameters are extracted from effective interaction potentials [1], which themselves are built up and fed from more physical-oriented measurements like Nanoindentation and PHYSICAL scratch. By using such effective material potentials one can derive critical loading situations leading to failure (decomposition strength) for any contact situation. A subsequent connection of these decomposition or failure states with the corresponding stress or strain distributions allows the development of rather comprehensive tribological parameter models applicable in wear and fatigue simulations as demonstrated in this work. From this a new sophisticated wear model has been developed on the basis of the effective indenter concept [1, 2] by using the extended Hertzian approach [3, 4]. The models do not only allow to analyze certain tribological experiments like the well known pin-on disk test orthe more recently developed nano-fretting tests, but also to forward simulate such tests and even give hints for better component life-time predictions. The work will show how the procedure in principle is to be applied and a few examples will be presented in the corresponding talk.