Numerical and Experimental Optimization for Specific Fatigue Life Maximization of Additively Manufactured Ti-6Al-4V Aerospace Components

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  • Computer Aided Design (CAD) in combination with structural optimization has allowed the rapid development of engineering prototypes. Topology and multi-scale design optimization techniques are capable of shaping highly efficient load paths. However, the resulting geometries are complex and can only be manufactured by Additive Manufacturing (AM) technology. One of the main downfalls of AM parts is their poor fatigue life which hinders the potential merits of design optimization. This thesis investigates experimental and numerical strategies to extend the fatigue life of DMLS Ti-6Al-4V components. Two stages to develop fatigue resistant AM parts are introduced. The first experimental stage is concerned with the application of Ultrasonic Impact Treatment (UIT) to enhance the fatigue life of AM parts and to derive the fatigue behavior of Ti-6AL-4V. The second numerical stage applies topology optimization with lattice material to minimize damage and mass using the newly derive material properties.

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  • Copyright © 2020 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
Date Created
  • 2020


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