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Energy Absorption Properties of Periodic and Stochastic 3D Lattice Materials

Mueller, Jochen and Matlack, Kathryn H. and Shea, Kristina and Daraio, Chiara (2019) Energy Absorption Properties of Periodic and Stochastic 3D Lattice Materials. Advanced Theory and Simulations, 2 (10). Art. No. 1900081. ISSN 2513-0390. https://resolver.caltech.edu/CaltechAUTHORS:20190805-105133177

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Abstract

Architected lattices can be designed to have tailorable functionalities by controlling their constitutive elements. However, little work has been devoted to comparing energy absorption properties in different periodic three‐dimensional geometries to each other and to comparable foam‐like random structures. This knowledge is essential for the entire design process. In this work, the authors conduct a systematic and comprehensive computational study of the quasi‐static and dynamic energy absorption properties of various different geometries. They test compression loading over strain rates varying from 1 to 10^4 s^(−1). The authors analyze geometries with varying degrees of nodal connectivity, ranging from bending dominated to stretching dominated, at different orientations, and compare their response to equivalent stochastic lattices. Results show relatively high stress peaks in the periodic lattices, even in bending dominated lattices at certain orientations. Conversely, the stochastic geometries show a relatively constant stress response over large strains, which is ideal for energy absorbing applications. Still, results show that specific orientations of bending dominated periodic lattice geometries outperform their stochastic equivalents. This work can help to quickly identify the potential of different unit cell types and aid in the development of lattices for impulse mitigation applications, such as in protective sports equipment, automotive crashworthiness, and packaging.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1002/adts.201900081DOIArticle
ORCID:
AuthorORCID
Mueller, Jochen0000-0002-4808-2223
Matlack, Kathryn H.0000-0001-7387-2414
Shea, Kristina0000-0003-3921-2214
Daraio, Chiara0000-0001-5296-4440
Additional Information:© 2019 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim. Received: April 24, 2019; Revised: July 6, 2019; First published: 05 August 2019. The authors acknowledge Cynthia Tan for her early contributions to this work. The authors further acknowledge Jonas Schwarz for his contributions to the model used for the simulations in this work. This work was partially supported by an ETH Postdoctoral Fellowship to K.H.M. The authors declare no conflict of interest.
Funders:
Funding AgencyGrant Number
ETH ZürichUNSPECIFIED
Subject Keywords:architected structures; cellular solids; energy absorption; fracture; lattice structures
Issue or Number:10
Record Number:CaltechAUTHORS:20190805-105133177
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190805-105133177
Official Citation:Mueller, J. , Matlack, K. H., Shea, K. and Daraio, C. (2019), Energy Absorption Properties of Periodic and Stochastic 3D Lattice Materials. Adv. Theory Simul., 2: 1900081. doi:10.1002/adts.201900081
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97637
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:05 Aug 2019 17:57
Last Modified:07 Oct 2019 20:10

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