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Project title

ADHERE: Further Development of Modelling the Effects of Low Adhesion Mechanisms (T1149)

  • Project number:

    T1149
  • Topic:

    Vehicle Track Interaction
  • Status:

    Completed

Project Summary

The aim of this project was to extend the Water Induced Low Adhesion Creep force (WILAC) model to take into account effects such as leaf contaminants and drying rail.

Project Abstract

Project Briefs are hosted on www.rssb.co.uk
Low adhesion caused by small amounts of water was investigated and modelled in RSSB project T1077 with the key output being the Water Induced Low Adhesion Creep force (WILAC) model. The WILAC model is integrated in the LABRADOR braking model helping to inform mitigation options against low adhesion. WILAC has now been developed further to take account of other low adhesion mechanisms and in particular those caused by leaves. Again the additional creep force curves generated can be used within LABRADOR to examine effects on braking. To enhance the model further time variant effects were studied, such as a drying rail or patchy, wet rail and leaf layers more representative of those found on the rail head. The LILAC model, that is the model created by extending WILAC through this project, is a valuable addition to the industry low adhesion modelling suite helping to formulate and do inexpensive testing of strategies for avoiding and mitigating the impact of low adhesion caused by water and leaves. The model can inform the design of braking systems to further improve capabilities in low adhesion conditions.

Project Reports

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