Australian Research Council Centre of Excellence Geotechnical Science and Engineering

Mr Qi-Deng Sun


BEng, MEng


  • 2011
    Bachelor of Civil Engineering at China University of Petroleum, China
  • 2008
    Master of Geological Engineering at Tongji University, China

Research Interests

  • Rail Transportation Geomechanics
  • Numerical Simulation of Underground Structure


  • Professor Buddhima Indraratna
  • Professor Song-Ping Zhu
  • Dr Sanjay Nimbalkar

Research Topic

Elasto-plastic Strain Based Approach for Analysing Rail Track Behaviour

Research Abstract

An elasto-plastic ballast model is proposed that can be used to judge the bearing capacity of ballasted railway tracks. The model describes the rate of the irreversible, plastic deformation generated during the cyclic loading process and incorporates the degradation of particles during triaxial shearing. The reversible response is represented by the pressure-dependent non-linear material rule. After the numerical integration of the model is specified, the model is calibrated on laboratory experiments and employed in a finite-element case study of the bearing capacity of railway track.