SSP-04

Test bench to inves­tigate stick-​​slip effects of material combi­na­tions


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The SSP-​​04 is especially designed to measure the stick-​​slip effect of a pair of materials using an accelerometer under typical appli­cation condi­tions. In addition, the classical friction coeffi­cients are deter­mined.

Tribo-​​acoustics deals with noise phenomena which are caused by critical combi­na­tions of materials. These are often perceived as unpleasant and reduce the subjective quality of a product. In addition, stick-​​slip can lead to increased abrasion, wear and malfunction.

The risk priority number [RPN] is a reliable indicator of whether a material combi­nation has a tendency of emitting creaking or squeaking noise.

This is helpful when devel­oping new products and take appro­priate counter­mea­sures in early phases. Ideally, before selecting the material combi­na­tions and starting serial production.

Stick-​​slip measure­ments are already done for many years, especially in the automotive industry and are included in various test speci­fi­ca­tions. The SSP-​​04 complies with the VDA-​​230 – 206 as well as the test speci­fi­ca­tions of well-​​known OEMs such as BMW, Ford, Volkswagen, Toyota, Fiat, Jaguar Land Rover and many other manufac­turers.

Conclusion

The SSP-​​04 deter­mines critical material combi­na­tions that later diminish the objective quality of the product in the form of increased abrasion, wear and even malfunction. In addition, these material pairings also reduce the subjective quality of a product due to unwanted noises.

Benefits
  • Shorter devel­opment times
  • Increase in product quality
  • Callback Avoidance
  • Reduction of warranty costs
Appli­cation examples
    • Evalu­ation of any material combi­nation to measure their potential for squeaking noises
    • Measurement of the elastic-​​plastic behaviour of compo­nents (e.g. seals)
    • Simulation of mileage driven e.g. 100.000 km to determine the abrasion behaviour of coatings or surfaces.

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