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- W4310633719 abstract "The total Lagrangian smoothed particle hydrodynamics (TL-SPH) for elastic solid dynamics suffers from hourglass modes which can grow and lead to the failure of simulation for problems with large deformation. To address this long-standing issue, we present an hourglass-free formulation based on volumetric-devioatric stress decomposition. Inspired by the fact that the artifact of nonphysical zigzag particle distribution induced by the hourglass modes is mainly characterized by shear deformation and the standard SPH discretization for the viscous term in the Navier-Stokes (NS) equation, the present formulation computes the action of shear stress directly through the Laplacian of displacement other than from the divergence of shear stress. A comprehensive set of challenging benchmark cases are simulated to demonstrate that, while improving accuracy and computational efficiency, the present formulation is able to eliminate the hourglass modes and achieves very good numerical stability with a single general effective parameter. In addition, the deformation of a practically relevant stent structure is simulated to demonstrate the potential of the present method in the field of biomechanics." @default.
- W4310633719 created "2022-12-13" @default.
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- W4310633719 date "2022-10-14" @default.
- W4310633719 modified "2023-09-27" @default.
- W4310633719 title "An hourglass-free formulation for total Lagrangian smoothed particle hydrodynamics" @default.
- W4310633719 doi "https://doi.org/10.48550/arxiv.2212.00753" @default.
- W4310633719 hasPublicationYear "2022" @default.
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