| Title | Wheel Bearing Brake/Instrumented Wheelset (WBB/IWS) Friction Characterization Study |
|---|---|
| Record ID | 68904 |
| Personal Name Creator |
Szablewski, Daniel; Caldwell, Robert |
| Corporate Creator | National Research Council of Canada |
| Corporate Contributor |
United States. Department of Transportation. Federal Railroad Administration. Office of Railroad Policy and Development; United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology |
| Publisher | United States. Department of Transportation. Federal Railroad Administration |
| Publication Date | 20191201 |
| Language | English |
| Abstract | The wheel/rail (W/R) interface experiences variable friction conditions during in-service operation. This is due mainly to the application of top-of-rail friction modifiers, gage face lubricants, and other third-body materials that exist at the W/R interface due to non-controlled environmental factors (e.g., rain, ice, plants, etc.). Friction acts to modify the traction coefficient (Tc) (i.e., creep curve) at the W/R contact zone. Understanding creep curve behavior as a function of friction is critical to providing accurate numerical modelling boundary condition inputs of wheel response during train operation. Accurate numerical modelling of train operations allows optimization of in-service component life cycles, maximizing safe operations of these components and minimizing detrimental environmental impacts. The study was aimed at mapping out Tc behavior as a function of four friction conditions: dry, wet, lube stick, and top of rail friction modification stick, applied directly on the wheel tread surface. In addition, vertical loading and wheel speed were investigated. Creep curve saturation results were presented independently as a function of each input condition. Wear and rolling contact fatigue were assessed as well on the wheel running surface following each friction condition run. |
| Rosap ID | dot:43646 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/43646 |
| TRT Terms | Mechanical fatigue; Friction; Instrumentation; Rolling contact; Traction; Wear; Railcar wheelsets |
| General Subjects | Wheel/rail Interface W/R; angle of attack; AoA; traction curves; instrumented wheelset; IWS; rolling contact fatigue; tribometer |
| Geographical Coverage |
United States |
| TRIS Online Accession No |
1724793 |
| Contract Number | FR-RPD-0054-13-01-00 |
| Report Number | DOT/FRA/ORD-19/46 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/68000/68900/68904/WBB_IWS_Rem.pdf |
| Format | |
| Database | NTL Digital Repository |