About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
Effect of Nonuniform Void Distributions on the Yield Strength of Metals |
Author(s) |
Aitor Cruzado, Amine Benzerga |
On-Site Speaker (Planned) |
Aitor Cruzado |
Abstract Scope |
Porosity-induced processing is unavoidable in additively manufactured parts. Studies of how porosity affects the strength are scarce. In particular, whether porosity distribution can be engineered to optimize strength merits study. To this end, an efficient fast Fourier transform (FFT) method is employed to investigate void distribution effects on the effective yielding of porous materials. The FFT homogenization approach is developed within a variational framework leading to a non-linear system of equations that are solved using Newton-Krylov methods. Specifically, we analyze the accuracy of FFT-based homogenization for yield surface prediction. High-throughput analysis is conducted using three-dimensional unit cells that contain randomly arranged voids of various sizes and volume fractions. The unit cell is subjected to numerical limit analysis, by imposing strain paths, enabling the exploration of a wide range of stress triaxiality values. Insights into the diverse yielding phenomena that arise in this type of problem are obtained as an outcome. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Computational Materials Science & Engineering, Mechanical Properties |