干旱区生态环境知识资源中心(Arid): Cholla cactus frames as lightweight and torsionally tough biological materials

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DOI	10.1016/j.actbio.2020.04.054
	Cholla cactus frames as lightweight and torsionally tough biological materials
	De Vivo, Luca; Matsushita, Albert K.; Kupor, Daniel; Luna, Josue; Tierra, Beatrice A.; Sah, Rober L.; Lubarda, Vlado A.; Meyers, Marc A.; McKittrick, Joanna M.; Krysl, Petr; Kuester, Falko
通讯作者	De Vivo, L
来源期刊	ACTA BIOMATERIALIA
ISSN	1742-7061
EISSN	1878-7568
出版年	2020
卷号	112 页码:213-224
英文摘要	Biological materials tested in compression, tension, and impact inspire designs for strong and tough materials, but torsion is a relatively neglected loading mode. The wood skeletons of cholla cacti, subject to spartan desert conditions and hurricane force winds, provide a new template for torsionally resilient biological materials. Novel mesostructural characterization methods of laser-scanning and photogrammetry are used alongside traditional optical microscopy, scanning electron microscopy, and micro-computed tomography to identify mechanisms responsible for torsional resistance. These methods, in combination with finite element analysis reveal how cholla meso and macro-porosity and fibril orientation contribute to highly density-efficient mechanical behavior. Selective lignification and macroscopic tubercle pore geometry contribute to density-efficient shear stiffness, while mesoscopic wood fiber straightening, delamination, pore collapse, and fiber pullout provide extrinsic toughening mechanisms. These energy absorbing mechanisms are enabled by the hydrated material level properties. Together, these hierarchical behaviors allow the cholla to far exceed bamboo and trabecular bone in its ability to combine specific torsional stiffness, strength, and toughness. Statement of Significance The Cholla cactus experiences, due to the high velocity desert winds, high torsional loads. Our study has revealed the amazingly ingenious strategy by which the tubular structure containing arrays of voids intermeshed with wood fibers resists these high loads. Deformation is governed by compressive and tensile stresses which are greatest at 45 degrees to the cross section. It proceeds by stretching, sliding, and bending of the wood fibers which are coupled with the pore collapse, resulting in delayed failure and a high torsional toughness. (c) 2020 Acta Materialia Inc. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license. (http://creativecommons.org/licenses/by-nc-nd/4.0/)
英文关键词	Biological materials Cholla cactus Finite element analysis Torsion
类型	Article
语种	英语
开放获取类型	Other Gold
收录类别	SCI-E
WOS记录号	WOS:000549500900018
WOS关键词	TO-BEND RATIOS ; MECHANICAL-PROPERTIES ; SPIRAL GRAIN ; WIND ; WOOD ; BREAKAGE ; BEHAVIOR ; LIGNIN ; TREES ; SHEAR
WOS类目	Engineering, Biomedical ; Materials Science, Biomaterials
WOS研究方向	Engineering ; Materials Science
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325077
作者单位	[De Vivo, Luca; Krysl, Petr; Kuester, Falko] Univ Calif San Diego, Dept Struct Engn, 9500 Gilman Dr, La Jolla, CA 92093 USA; [Matsushita, Albert K.; Luna, Josue; Lubarda, Vlado A.; Meyers, Marc A.; McKittrick, Joanna M.] Univ Calif San Diego, Dept Mech & Aerosp Engn, 9500 Gilman Dr, La Jolla, CA 92093 USA; [Matsushita, Albert K.; Luna, Josue; Lubarda, Vlado A.; Meyers, Marc A.; McKittrick, Joanna M.] Univ Calif San Diego, Mat Sci & Engn Program, 9500 Gilman Dr, La Jolla, CA 92093 USA; [Kupor, Daniel] Univ Calif San Diego, Dept Chem Engn, 9500 Gilman Dr, La Jolla, CA 92093 USA; [Tierra, Beatrice A.; Sah, Rober L.] Univ Calif San Diego, Dept Bioengn, 9500 Gilman Dr, La Jolla, CA 92093 USA; [Lubarda, Vlado A.; Meyers, Marc A.] Univ Calif San Diego, Dept Nanoengn, 9500 Gilman Dr, La Jolla, CA 92093 USA
推荐引用方式 GB/T 7714	De Vivo, Luca,Matsushita, Albert K.,Kupor, Daniel,et al. Cholla cactus frames as lightweight and torsionally tough biological materials[J],2020,112:213-224.
APA	De Vivo, Luca.,Matsushita, Albert K..,Kupor, Daniel.,Luna, Josue.,Tierra, Beatrice A..,...&Kuester, Falko.(2020).Cholla cactus frames as lightweight and torsionally tough biological materials.ACTA BIOMATERIALIA,112,213-224.
MLA	De Vivo, Luca,et al."Cholla cactus frames as lightweight and torsionally tough biological materials".ACTA BIOMATERIALIA 112(2020):213-224.