Inspection of insulated fishplates: Development of an inspection method for insulated fishplates in track (LR-IM-003)

Some insulated fishplates of Benkler joints have fractured in service, but as the metal of the fishplates is wholly encased in an opaque polymer coating, neither visual nor ultrasonic non-destructive test methods can be used to detect cracks and give prior warning of failure. If cracks were detected at...