Multifunctionality of nanoengineered self-sensing lattices enabled by additive manufacturing

Ubaid, J., Schneider, J. , Deshpande, V. S., Wardle, B. and Kumar, S. (2022) Multifunctionality of nanoengineered self-sensing lattices enabled by additive manufacturing. Advanced Engineering Materials, 24(7), 2200194. (doi: 10.1002/adem.202200194)

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Abstract

Lightweight cellular materials are engineered to enhance performance attributes such as high energy absorption, high specific stiffness, negative Poisson’s ratio, negative thermal expansion coefficient etc. However, self-sensing functionality of such architected materials is seldom explored. Here, we report a combined experimental and numerical study on additive manufacturing (AM)-enabled self-sensing 3D periodic cellular composites processed via fused filament fabrication, utilizing in-house engineered multi-wall carbon nanotube (MWCNT)/polypropylene random copolymer (PPR) filament feedstocks. We experimentally demonstrate the tunable piezoresistive self-sensing and enhanced mechanical performance of PPR/MWCNT lattices by varying their architectural parameters such as the unit-cell geometry and the relative density, besides the loading of CNT reinforcement. Our AM-enabled architected PPR/MWCNT lattices reveal strain and damage sensitivity gauge factors 12 and 1.2, respectively, comparable to bulk materials’ commercial gauge factors. In agreement with numerical models, the PPR/MWCNT lattices exhibit 200%, 155%, 153%, and 137% increase in stiffness, energy absorption capacity (as high as 4.7 MJ/m3), specific energy absorption (20.5 J/g) and energy absorption efficiency (90%) respectively, compared with their non-reinforced counterparts. The tunable multifunctional performance of AM-enabled cellular composites demonstrated here provides guidelines for the design and development of composite lattices with advantaged structural and functional properties for an array of applications such as patient-specific biomedical devices capable of measuring comfort in prosthetics.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Schneider, Johannes and Kumar, Professor Shanmugam
Authors: Ubaid, J., Schneider, J., Deshpande, V. S., Wardle, B., and Kumar, S.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Advanced Engineering Materials
Publisher:Wiley
ISSN:1438-1656
ISSN (Online):1527-2648
Published Online:26 April 2022
Copyright Holders:Copyright © 2022 The Authors
First Published:First published in Advanced Engineering Materials 24(7): 2200194
Publisher Policy:Reproduced under a Creative Commons License
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
305200DTP 2018-19 University of GlasgowMary Beth KneafseyEngineering and Physical Sciences Research Council (EPSRC)EP/R513222/1MVLS - Graduate School