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The lattice-intersection model for composite cylinders considering intersection effects
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DOI：10.1016/j.ijsolstr.2026.114000.png)
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Abstract
En 中文
A critical, long-overlooked gap in lattice cylinder mechanics is the neglect of joint-region mechanical effects by conventional methods (equivalent continuum method, 3D stress–strain rotational axis superposition method). This oversight invalidates accurate differentiation of shear performances among structures with homogeneous members, undermining reliable strength and failure analysis for engineering use. This work proposes a lattice-intersection model (L-I model) for enabling mechanistically sound differentiation of shear performances for composite lattice cylinders. The L-I model is grounded in mechanics and only requires the proportion of the intersection region. The work further advances lattice mechanics by deriving a closed-form function for the 3D yield surface and summarizing failure mode methodologies for diverse lattice shells. Lattice specimens, fabricated via rigid-flexible hybrid molds and additive manufacturing, validate the model through experiments and simulations. Stiffness radar charts, 2D anisotropic Young’s modulus maps, 3D yield surfaces, and failure mechanism diagrams are presented, offering a rigorous, intuitive foundation for advancing lattice mechanics research and engineering applications.
Keywords:
lattice-intersection model
composite lattice cylinders
shear performance
3D yield surface
failure mode
Journal
IF:
3.8
Papers:
1.1W
Citations:
3.1W