Track Buckle Modeling: Review of Strength Parameters

MxV Rail is partnering with Texas A&M University (TAMU) to develop a state of the art track buckling model called the “AAR/TAMU Track Buckle Model”.1 The model is owned by the Association of American Railroads (AAR) and is envisioned to be a comprehensive and flexible model that allows MxV Rail engineers to both assess track buckling risk and explore wide-ranging buckle-prone situations using a Finite Element Method (FEM) solution. This Technology Digest reviews the track strength parameters incorporated into the current or future versions of the AAR/TAMU track buckle model.  BUCKLE FORCES – STRENGTH/RESISTANCE FACTORS  Track buckles occur when the buildup of compressive longitudinal rail forces exceeds the lateral resistance provided by the track structure. While thermal rail forces are the primary contributor to buckling forces, vehicle forces in all three axes are influential as well. The track strength resisting buckling comes from a range of factors including parameters of…