Thermographic Inspection Simulation of One Kind of Rail Defects

Abstract Rail is an important foundation of rail transit, and defects on the may pose a serious threat to transit. As new non-destructive testing method, thermographic detection shows excellent application prospect. In order verify whether technology can be used detect rail, especially at bottom rail. The ANSYS software model rails under different conditions, heat flow simulation experiment carried out obtain temperature change results when passes through it does not. existence location determined by observing how changes due defects. Although show that surface fracture towards edge clearly detected thermal modeling laser heating for transverse cracks exist near center bottom, experiments still cannot distinguish differences same observation current parameters. So necessary further optimize experimental process, or increase parameters, so method better applied