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Title: Quasi-static energy absorption of hollow microlattice structures

Abstract

We present a comprehensive modeling and numerical study focusing on the energy quasi-static crushing behavior and energy absorption characteristics of hollow tube microlattice structures. The peak stress and effective plateau stress of the hollow microlattice structures are deduced for different geometrical parameters which gives volume and mass densities of energy absorption, D-v and D-m, scale with the relative density, (rho) over bar, as D-v similar to (rho) over bar (1) (5) and D-m similar to (rho) over bar (0 5), respectively, fitting very well to the experimental results of both 60 degrees inclined and 90 degrees predominately microlattices. Then the strategies for energy absorption enhancement are proposed for the engineering design of microlattice structures. By introducing a gradient in the thickness or radius of the lattice members, the buckle propagation can be modulated resulting in an increase in energy absorption density that can exceed 40%. Liquid filler is another approach to improve energy absorption by strengthening the microtruss via circumference expansion, and the gain may be over 100% in terms of volume density. Insight into the correlations between microlattice architecture and energy absorption performance combined with the high degree of architecture control paves the way for designing high performance microlatticemore » structures for a range of impact and impulse mitigation applications for vehicles and structures. (C) 2014 Elsevier Ltd. All rights reserved.« less

Authors:
; ; ;
Publication Date:
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1211024
DOE Contract Number:  
DE-AR0000396
Resource Type:
Journal Article
Resource Relation:
Journal Name: Composites. Part B, Engineering; Journal Volume: 67
Country of Publication:
United States
Language:
English

Citation Formats

Liu, YL, Schaedler, TA, Jacobsen, AJ, and Chen, X. Quasi-static energy absorption of hollow microlattice structures. United States: N. p., 2014. Web. doi:10.1016/j.compositesb.2014.06.024.
Liu, YL, Schaedler, TA, Jacobsen, AJ, & Chen, X. Quasi-static energy absorption of hollow microlattice structures. United States. doi:10.1016/j.compositesb.2014.06.024.
Liu, YL, Schaedler, TA, Jacobsen, AJ, and Chen, X. Mon . "Quasi-static energy absorption of hollow microlattice structures". United States. doi:10.1016/j.compositesb.2014.06.024.
@article{osti_1211024,
title = {Quasi-static energy absorption of hollow microlattice structures},
author = {Liu, YL and Schaedler, TA and Jacobsen, AJ and Chen, X},
abstractNote = {We present a comprehensive modeling and numerical study focusing on the energy quasi-static crushing behavior and energy absorption characteristics of hollow tube microlattice structures. The peak stress and effective plateau stress of the hollow microlattice structures are deduced for different geometrical parameters which gives volume and mass densities of energy absorption, D-v and D-m, scale with the relative density, (rho) over bar, as D-v similar to (rho) over bar (1) (5) and D-m similar to (rho) over bar (0 5), respectively, fitting very well to the experimental results of both 60 degrees inclined and 90 degrees predominately microlattices. Then the strategies for energy absorption enhancement are proposed for the engineering design of microlattice structures. By introducing a gradient in the thickness or radius of the lattice members, the buckle propagation can be modulated resulting in an increase in energy absorption density that can exceed 40%. Liquid filler is another approach to improve energy absorption by strengthening the microtruss via circumference expansion, and the gain may be over 100% in terms of volume density. Insight into the correlations between microlattice architecture and energy absorption performance combined with the high degree of architecture control paves the way for designing high performance microlattice structures for a range of impact and impulse mitigation applications for vehicles and structures. (C) 2014 Elsevier Ltd. All rights reserved.},
doi = {10.1016/j.compositesb.2014.06.024},
journal = {Composites. Part B, Engineering},
number = ,
volume = 67,
place = {United States},
year = {Mon Dec 01 00:00:00 EST 2014},
month = {Mon Dec 01 00:00:00 EST 2014}
}