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The current research work focuses on molecular dynamicsMolecular dynamics simulationsSimulation of fatigueFatigue crackCrack propagation behavior in dissimilar jointsDissimilar 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 crackCrack propagation behavior through the dissimilar jointDissimilar joints with a notch at the dissimilar interface. For initial loading cycles, the crackCrack grows in a straight line and then deviates towards aluminum leading to complete fracture. The simulationSimulation result shows faster crackCrack growth rate at/near the interface region when compared with crackCrack growth rate in Al side after deviation from the straight path. The grain boundaries and the differences in the material properties appear to drive crackCrack path during cyclic loading of the dissimilar jointsDissimilar joints. These observations compare well against the experimental observations from the previous studies.

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Molecular Dynamics Simulation of Fatigue Crack Propagation in Aluminum and Steel Dissimilar Joints

  • 会议论文

  • 发表日期：

    2025年

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  • Rohit Singh,
  • Jignesh Nakrani,
  • Amber Shrivastava

摘要

The current research work focuses on molecular dynamicsMolecular dynamics simulationsSimulation of fatigueFatigue crackCrack propagation behavior in dissimilar jointsDissimilar 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 crackCrack propagation behavior through the dissimilar jointDissimilar joints with a notch at the dissimilar interface. For initial loading cycles, the crackCrack grows in a straight line and then deviates towards aluminum leading to complete fracture. The simulationSimulation result shows faster crackCrack growth rate at/near the interface region when compared with crackCrack growth rate in Al side after deviation from the straight path. The grain boundaries and the differences in the material properties appear to drive crackCrack path during cyclic loading of the dissimilar jointsDissimilar joints. These observations compare well against the experimental observations from the previous studies.