Hierarchical structural design for fracture resistance in the shell of the pteropod Clio pyramidata
The thecosomes are a group of planktonic pteropods with thin, 1 mm-sized aragonitic shells, which are known to possess a unique helical microstructure consisting of interlocking nanofibres. Here we investigate the detailed hierarchical structural and mechanical design of the pteropod Clio pyramidata...
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| Format: | Article |
| Language: | en_US |
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Nature Publishing Group
2017
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| Online Access: | http://hdl.handle.net/1721.1/109030 https://orcid.org/0000-0002-6741-9741 https://orcid.org/0000-0003-3511-5679 |
| _version_ | 1811071572330414080 |
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| author | Li, Ling Weaver, James C. Ortiz, Christine |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Li, Ling Weaver, James C. Ortiz, Christine |
| author_sort | Li, Ling |
| collection | MIT |
| description | The thecosomes are a group of planktonic pteropods with thin, 1 mm-sized aragonitic shells, which are known to possess a unique helical microstructure consisting of interlocking nanofibres. Here we investigate the detailed hierarchical structural and mechanical design of the pteropod Clio pyramidata. We quantify and elucidate the macroscopic distribution of the helical structure over the entire shell (~1 mm), the structural characteristics of the helical assembly (~10–100 μm), the anisotropic cross-sectional geometry of the fibrous building blocks (~0.5–10 μm) and the heterogeneous distribution of intracrystalline organic inclusions within individual fibres (<0.5 μm). A global fibre-like crystallographic texture is observed with local in-plane rotations. Microindentation and electron microscopy studies reveal that the helical organization of the fibrous building blocks effectively constrains mechanical damages through tortuous crack propagation. Uniaxial micropillar compression and cross-sectional transmission electron microscopy directly reveal that the interlocking fibrous building blocks further retard crack propagation at the nanometre scale. |
| first_indexed | 2024-09-23T08:53:17Z |
| format | Article |
| id | mit-1721.1/109030 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:53:17Z |
| publishDate | 2017 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/1090302022-09-30T11:56:08Z Hierarchical structural design for fracture resistance in the shell of the pteropod Clio pyramidata Li, Ling Weaver, James C. Ortiz, Christine Massachusetts Institute of Technology. Department of Materials Science and Engineering Li, Ling Ortiz, Christine The thecosomes are a group of planktonic pteropods with thin, 1 mm-sized aragonitic shells, which are known to possess a unique helical microstructure consisting of interlocking nanofibres. Here we investigate the detailed hierarchical structural and mechanical design of the pteropod Clio pyramidata. We quantify and elucidate the macroscopic distribution of the helical structure over the entire shell (~1 mm), the structural characteristics of the helical assembly (~10–100 μm), the anisotropic cross-sectional geometry of the fibrous building blocks (~0.5–10 μm) and the heterogeneous distribution of intracrystalline organic inclusions within individual fibres (<0.5 μm). A global fibre-like crystallographic texture is observed with local in-plane rotations. Microindentation and electron microscopy studies reveal that the helical organization of the fibrous building blocks effectively constrains mechanical damages through tortuous crack propagation. Uniaxial micropillar compression and cross-sectional transmission electron microscopy directly reveal that the interlocking fibrous building blocks further retard crack propagation at the nanometre scale. National Science Foundation (U.S.) ((Massachusetts Institute of Technology. Center for Materials Science and Engineering (DMR-0819762)) United States. Army Research Office (Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies (Contract W911NF-07-D-0004)) United States. Department of Defense. National Security Science and Engineering Faculty Fellows 2017-05-11T22:25:03Z 2017-05-11T22:25:03Z 2015-04 2014-07 Article http://purl.org/eprint/type/JournalArticle 2041-1723 http://hdl.handle.net/1721.1/109030 Li, Ling, James C. Weaver, and Christine Ortiz. “Hierarchical Structural Design for Fracture Resistance in the Shell of the Pteropod Clio Pyramidata.” Nat Comms 6 (February 18, 2015): 6216. © 2015 Macmillan Publishers Limited https://orcid.org/0000-0002-6741-9741 https://orcid.org/0000-0003-3511-5679 en_US http://dx.doi.org/10.1038/ncomms7216 Nature Communications Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Nature Publishing Group Nature Publishing Group |
| spellingShingle | Li, Ling Weaver, James C. Ortiz, Christine Hierarchical structural design for fracture resistance in the shell of the pteropod Clio pyramidata |
| title | Hierarchical structural design for fracture resistance in the shell of the pteropod Clio pyramidata |
| title_full | Hierarchical structural design for fracture resistance in the shell of the pteropod Clio pyramidata |
| title_fullStr | Hierarchical structural design for fracture resistance in the shell of the pteropod Clio pyramidata |
| title_full_unstemmed | Hierarchical structural design for fracture resistance in the shell of the pteropod Clio pyramidata |
| title_short | Hierarchical structural design for fracture resistance in the shell of the pteropod Clio pyramidata |
| title_sort | hierarchical structural design for fracture resistance in the shell of the pteropod clio pyramidata |
| url | http://hdl.handle.net/1721.1/109030 https://orcid.org/0000-0002-6741-9741 https://orcid.org/0000-0003-3511-5679 |
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