CaltechAUTHORS
  A Caltech Library Service

Catastrophic vs Gradual Collapse of Thin-Walled Nanocrystalline Ni Hollow Cylinders As Building Blocks of Microlattice Structures

Lian, Jie and Jang, Dongchan and Valdevit, Lorenzo and Schaedler, Tobias A. and Jacobsen, Alan J. and Carter, William B. and Greer, Julia R. (2011) Catastrophic vs Gradual Collapse of Thin-Walled Nanocrystalline Ni Hollow Cylinders As Building Blocks of Microlattice Structures. Nano Letters, 11 (10). pp. 4118-4125. ISSN 1530-6984. https://resolver.caltech.edu/CaltechAUTHORS:20111116-101311984

[img]
Preview
PDF - Supplemental Material
See Usage Policy.

311Kb
[img] Video (AVI) - Supplemental Material
See Usage Policy.

2645Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20111116-101311984

Abstract

Lightweight yet stiff and strong lattice structures are attractive for various engineering applications, such as cores of sandwich shells and components designed for impact mitigation. Recent breakthroughs in manufacturing enable efficient fabrication of hierarchically architected microlattices, with dimensional control spanning seven orders of magnitude in length scale. These materials have the potential to exploit desirable nanoscale-size effects in a macroscopic structure, as long as their mechanical behavior at each appropriate scale – nano, micro, and macro levels – is properly understood. In this letter, we report the nanomechanical response of individual microlattice members. We show that hollow nanocrystalline Ni cylinders differing only in wall thicknesses, 500 and 150 nm, exhibit strikingly different collapse modes: the 500 nm sample collapses in a brittle manner, via a single strain burst, while the 150 nm sample shows a gradual collapse, via a series of small and discrete strain bursts. Further, compressive strength in 150 nm sample is 99.2% lower than predicted by shell buckling theory, likely due to localized buckling and fracture events observed during in situ compression experiments. We attribute this difference to the size-induced transition in deformation behavior, unique to nanoscale, and discuss it in the framework of “size effects” in crystalline strength.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/nl202475pDOIArticle
http://pubs.acs.org/doi/full/10.1021/nl202475pPublisherArticle
ORCID:
AuthorORCID
Jang, Dongchan0000-0002-2814-9734
Greer, Julia R.0000-0002-9675-1508
Additional Information:© 2011 American Chemical Society. Received: May 31, 2011. Revised: August 12, 2011. Publication Date (Web): August 18, 2011. The authors gratefully acknowledge the financial support of DARPA through MCMA program, contract no. W91CRB-10C-0305. The authors are grateful to Emily Warmann for helping on XRD work and Sophia Yang for help with sample fabrication. The authors also gratefully acknowledge helpful discussions with John Hutchinson and Mike Baskes.
Group:Kavli Nanoscience Institute
Funders:
Funding AgencyGrant Number
Army Research Office (ARO)W91CRB-10C-0305
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Subject Keywords:Nanocrystalline Ni; shell collapse; uniaxial compression; buckling strength; microlattice structures
Issue or Number:10
Record Number:CaltechAUTHORS:20111116-101311984
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20111116-101311984
Official Citation:Catastrophic vs Gradual Collapse of Thin-Walled Nanocrystalline Ni Hollow Cylinders As Building Blocks of Microlattice Structures Jie Lian, Dongchan Jang, Lorenzo Valdevit, Tobias A. Schaedler, Alan J. Jacobsen, William B. Carter, and Julia R. Greer Nano Letters 2011 11 (10), 4118-4125
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:27802
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:16 Nov 2011 18:31
Last Modified:03 Oct 2019 03:26

Repository Staff Only: item control page