2025-08-07 ローレンスリバモア国立研究所(LLNL)
Scientists at Lawrence Livermore National Laboratory (LLNL) and their collaborators have created a new class of programmable soft materials that can absorb impacts like never before, while also changing shape when heated. (Photo: Julie Mancini)
＜関連情報＞
- https://www.llnl.gov/article/53241/llnl-team-develops-new-material-bends-bounces-absorbs-energy-demand
- https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.202420048
プログラム可能なエネルギー吸収機能を備えた液晶エラストマー格子 Architected Liquid Crystal Elastomer Lattices with Programmable Energy Absorption
Rodrigo Telles, Julie A. Mancini, Jorge-Luis Barrera, Marlini Simoes, Dominique H. Porcincula, Adam Bischoff, Devin J. Roach, Samuel C. Leguizamon, Elaine Lee, Caitlyn C. Cook, Jennifer A. Lewis
Advanced Materials Published: 23 June 2025
DOI:https://doi.org/10.1002/adma.202420048
Abstract
Architected LCE lattices are fabricated with flow-induced alignment via direct ink writing and systematically characterized their shape morphing, stiffness, and energy absorption behavior across strain rates spanning six orders of magnitude from 10−3 to 103 s−1. It is shown that architected liquid crystal elastomer (LCE) lattices exhibit superior energy absorption compared to their non-mesogenic (silicone) counterparts. Importantly, the LCE-to-silicone energy absorption ratios are up to 18-fold higher at the highest strain rate tested. A finite element model that captures their shape-morphing response is developed, which exhibits excellent agreement with the experimental observations. The work opens new avenues for designing and fabricating LCE lattices with programmable alignment, shape morphing, and mechanics.
