Liming Huang, Hongyuan Wan, Quanfeng Han, Jianxiang Wang, Xin Yi
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Mitigating surface notches for enhanced fatigue performance of metallic gyroid structures via contour scanning
Additive manufacturing has enabled the creation of lattice structures with tunable properties, making them increasingly popular across various industries. However, their fatigue resistance remains a critical concern for long-term use. While contour scanning, a remelting technique in selective laser melting, improves surface quality and mechanical properties in tensile specimens, its effect on the fatigue behavior of as-built lattices remains underexplored. This study characterizes the manufacturing defects and intricate geometry of 316L skeletal gyroid lattice structures and investigates the impact of contour scanning on their compression-compression fatigue behavior through experimental and numerical approaches. The results show a significant improvement in high-cycle fatigue endurance due to contour scanning, attributed to enhanced surface smoothness. Cyclic ratcheting is identified as the dominant fatigue mechanism in both gyroid samples, with and without contour scanning. Additionally, fatigue life predictions based on finite element analysis, informed by experimental fatigue data and Basquin's equation, align well with experimental results. This work underscores the importance of contour scanning in enhancing the fatigue performance of lattice structures.
期刊介绍：
The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering.
The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture).
Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content.
In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.
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