About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Atomistic Simulations Linked to Experiments to Understand Mechanical Behavior: A MPMD Symposium in Honor of Professor Diana Farkas
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Presentation Title |
Molecular Dynamics Simulation of Fatigue Crack Propagation in Aluminum and Steel Dissimilar Joints |
Author(s) |
Rohit Singh, Jignesh Nakrani, Amber Shrivastava |
On-Site Speaker (Planned) |
Rohit Singh |
Abstract Scope |
The current research work focuses on molecular dynamics simulations of fatigue crack propagation behavior in dissimilar joints of aluminum and steel. A model with multiple grains of aluminum and steel is developed to simulate the friction welding. The model is extended to capture the crack propagation behavior through the dissimilar joint with a notch at the dissimilar interface. For initial loading cycles, the crack grows in a straight line and then deviates towards aluminum leading to complete fracture. The simulation result show faster crack growth rate at/near the interface region as compared to crack growth rate in Al side after deviation from the straight path. The grain boundaries and the differences in the material properties appear to drive crack path during cyclic loading of the dissimilar joints. These observation compare well against the experimental observations from the previous studies. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Joining, Modeling and Simulation |