December 1, 2014 Thesis Open Access

Mesfin G/Tsadik

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{
  "DOI": "10.20372/nadre:4814", 
  "author": [
    {
      "family": "Mesfin G/Tsadik"
    }
  ], 
  "issued": {
    "date-parts": [
      [
        2014, 
        12, 
        1
      ]
    ]
  }, 
  "abstract": "<p>Railway vehicles require a certain level of adhesion between wheel and rail to operate efficiently, reliably, and economically. Different levels of adhesion are needed depending on the vehicle running conditions. In the wheel tread&ndash;railhead contact, the dominant problem is low adhesion, as low adhesion on the railhead negatively affects railway operation: on one hand, the vehicle will lose traction resulting in delay when driving on low-adhesion tracks; on the other hand, low adhesion during deceleration will extend the braking distance, which is a safety issue. This thesis examines the influence of several contaminants, i.e., water, mud, leaves, oil and grease, on the adhesion in the wheel tread&ndash;railhead contact. This study will also improve our knowledge of the low-adhesion mechanism and of how various contaminants influence adhesion</p>", 
  "title": "EXTENT OF ADHESION LOSSES IN THE WHEEL- RAIL CONTACT UNDER CONTAMINATED CONDITIONS", 
  "type": "thesis", 
  "id": "4814"
}