Student | Hang Su | Materials and Manufacturing - RMCRC
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Student | Hang Su | Materials and Manufacturing

PhD students

Hang Su

Monash University (Supervisor: Wenyi Yan)

PhD topic – Plastic deformation of flash butt welds in high strength steel rails

Hang Su

Research summary

Due to the variation in material characteristics that are inherent with a welding process, rail welds have higher rates of rolling contact damage than the adjacent parent rails. This study will investigate the plastic deformation (ratcheting behaviour) of flash butt welds in high strength steel rails which are currently used in Australian heavy haul operations. The outcomes will provide valuable information about understanding the initiation of rolling contact fatigue in rail welds and further developing cost-effective rail maintenance strategies for the purposes of fulfilling the demanding conditions and maintaining a safe heavy haul environment.

Expected completion date

October 2020

Key achievements

  • The ratcheting behaviour of flash butt welds in high strength steel rails was investigated by experiments.
  • The cyclic plasticity constitutive model for flash butt welds in high strength steel rails was established.
  • The ratcheting performance of flash butt welds in high strength steel rails under in-service loading conditions was evaluated by numerical simulations.

Publications