Lendlein, C., & Tan, N. Y. J. (2025). Twin-inspired design for strengthening and toughening of lightweight lattices in plastic deformation. MRS Communications, 15(3), 300–307. https://doi.org/10.1557/s43579-025-00712-1
Abstract:
Abstract
Energy absorbing lattices applied as protective material suffer premature failure due to shear band propagation. Here, the twin toughening mechanism found in crystals in nano-/microscale is translated to a macroscopic lattice design and is realized by digital light processing. Twin boundaries are formed as sharing plane of two mirrored cells and are enabled by variation of strut thicknesses with a proportion of
$$0.617$$
0.617
in the unit cell. The designed twin boundary can effectively steer crack propagation while dissipating energy resulting in increased specific energy absorption. This effect is amplified by integrating a maximum number of twin boundaries in the material.
Graphical Abstract
License type:
Attribution 4.0 International (CC BY 4.0)
Funding Info:
This research is supported by core funding from: Advanced Remanufacturing and Technology Centre
Grant Reference no. :
Description:
This is a post-peer-review, pre-copyedit version of an article published in MRS Communications. The final authenticated version is available online at: http://dx.doi.org/https://doi.org/10.1557/s43579-025-00712-1.