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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 40370 (07)
- University: Sharif University of Technology
- Department: Materials Science and Engineering
- Advisor(s): Davami, Parviz; Varahram, Naser
- Abstract:
- In this thesis the effects of some casting parameters on residual stress and strain in steel casting parts have been studied. An H shape model has been chosen in order to investigate effects of casting parameters such as mold and cast constraints and inhomogeneous cooling on residual stress formation during casting in sand mold. These aforementioned factors have been simulated and studied in this research. Cooling of casting parts in sand mold and coupled thermo mechanical analysis has been simulated with the help of commercial finite element package ABAQUS. The results of this study show that, the complex samples with different section area, because of mold and cast constraints and different cooling rate have great potential for residual stress formation in casting process. Moreover mold, riser, core, gating system and any other factor that resist against contraction, intensify residual stress and should be considered in simulation. Simulation results completely affected by the mechanical model of sand mold and cast. In order to reach more acceptable results elastic plastic model should be considered for both mold and cast in simulation process. Hole drilling method was used to verify the simulation results. This is a mechanical and semi destructive test for measuring residual stress and is applicable because of availability and low cost. Simulation results and experimental data were in good agreement.
- Keywords:
- Sand Casting ; Residual Stress ; Finite Element Method ; Hole Drilling ; Strain Gages
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