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Process Modelling of Combustion Casings

Researchers : Bhaskar Thota

Collaborators : Dr. J-C. Gebelin,  Professor R.C. Reed

Superalloys fall under the category of very difficult to machine material and another major problem identified during the manufacturing of several components used in aerospace industry is distortion because of the machining operations. The knowledge from the research community showed that the distortion occurred during the machining is dependent on the bulk and near surface residual stresses. The bulk stresses are produced during the heat treatment and near surface residual stresses are produced during the machining. Modelling of the processes both heat treatment and machining will enable us to understand the influence of machining parameters on the distortion and optimisation of cut sequence in order to get minimal distortion during the machining. DEFORM a commercial finite element modelling software was used for the process modelling of turbine and combustion casings The outcome of this project would be a finite element model which will help us:

  • Understanding the stress distribution during the heat treatment and the effect the bulk residual stresses on the distortion after the heat treatment of the component.
  • The effect of near surface residual stresses on the distortion of the component.
  • Optimised machining sequence to be adapted in order to reduce the distortion.

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