Journal
ADVANCED MATERIALS
Volume 32, Issue 28, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202000797
Keywords
3D printing; Digital Light Processing; energy-dissipative lattices; liquid crystal elastomers; mechanical dissipation
Categories
Funding
- U.S. Army Research Laboratory
- U. S. Army Research Office [W911NF1710165]
- NSF CAREER Award [CMMI-1350436]
- Laboratory Directed Research and Development program at Sandia National Laboratories
- U.S. Department of Energy's National Nuclear Security Administration [DE-NA0003525]
- English Speaking Union through the Lindemann Trust Fellowship
- U.S. Department of Defense (DOD) [W911NF1710165] Funding Source: U.S. Department of Defense (DOD)
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Digital Light Processing (DLP) 3D printing enables the creation of hierarchical complex structures with specific micro- and macroscopic architectures that are impossible to achieve through traditional manufacturing methods. Here, this hierarchy is extended to the mesoscopic length scale for optimized devices that dissipate mechanical energy. A photocurable, thus DLP-printable main-chain liquid crystal elastomer (LCE) resin is reported and used to print a variety of complex, high-resolution energy-dissipative devices. Using compressive mechanical testing, the stress-strain responses of 3D-printed LCE lattice structures are shown to have 12 times greater rate-dependence and up to 27 times greater strain-energy dissipation compared to those printed from a commercially available photocurable elastomer resin. The reported behaviors of these structures provide further insight into the much-overlooked energy-dissipation properties of LCEs and can inspire the development of high-energy-absorbing device applications.
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