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Orientation-dependent damping capacities in liquid crystal elastomers under high-frequency cyclic loading: A peridynamic study
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DOI：10.1016/j.ijsolstr.2026.114214.png)
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Abstract
En 中文
Liquid crystal elastomers (LCEs) are a class of dissipative materials that combine the elasticity of polymer networks with the orientational order of liquid crystal mesogens. Through the intrinsic coupling between deformation and director rotation, LCEs exhibit distinct viscoelastic behavior, making them promising candidates for energy dissipation and absorption. While the viscosity of LCEs has been extensively studied under low-strain-rate and low-frequency loading, the influence of material parameters and mesogen alignment on their dissipation performance under high-frequency cyclic loading remains largely unexplored. Using peridynamic simulations, this study demonstrates that LCE samples with an initial director alignment of 45° achieve the highest energy dissipation across all orientations examined. Furthermore, the director rotation viscosity coefficient ηn plays a crucial role in the viscoelastic response, with an optimal value that depends on the loading frequency. These results indicate that the time-scale matching between director rotation and cyclic network deformation is key to governing the dynamic behavior of LCEs under high-frequency cyclic loading. The findings offer valuable guidance for the design and optimization of LCE-based structures for damping applications.
Keywords:
Liquid crystal elastomers
Peridynamics
Multiphysics
Energy dissipation
Journal
IF:
3.8
Papers:
1.1W
Citations:
3.1W