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Enhanced protective role in materials with gradient structural orientations: Lessons from Nature
Liu, ZQ; Zhu, YK; Jiao, D; Weng, ZY; Zhang, ZF; Ritchie, RO; Ritchie, RO (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.; Zhang, ZF (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China.
2016-10-15
Source PublicationACTA BIOMATERIALIA
ISSN1742-7061
Volume44Pages:31-40
AbstractLiving organisms are adept at resisting contact deformation and damage by assembling protective surfaces with spatially varied mechanical properties, i.e., by creating functionally graded materials. Such gradients, together with multiple length-scale hierarchical structures, represent the two prime characteristics of many biological materials to be translated into engineering design. Here, we examine one design motif from a variety of biological tissues and materials where site-specific mechanical properties are generated for enhanced protection by adopting gradients in structural orientation over multiple length-scales, without manipulation of composition or microstructural dimension. Quantitative correlations are established between the structural orientations and local mechanical properties, such as stiffness, strength and fracture resistance; based on such gradients, the underlying mechanisms for the enhanced protective role of these materials are clarified. Theoretical analysis is presented and corroborated through numerical simulations of the indentation behavior of composites with distinct orientations. The design strategy of such bioinspired gradients is outlined in terms of the geometry of constituents. This study may offer a feasible approach towards generating functionally graded mechanical properties in synthetic materials for improved contact damage resistance. Statement of Significance Living organisms are adept at resisting contact damage by assembling protective surfaces with spatially varied mechanical properties, i.e., by creating functionally-graded materials. Such gradients, together with multiple length-scale hierarchical structures, represent the prime characteristics of many biological materials. Here, we examine one design motif from a variety of biological tissues where site-specific mechanical properties are generated for enhanced protection by adopting gradients in structural orientation at multiple length-scales, without changes in composition or microstructural dimension. The design strategy of such bioinspired gradients is outlined in terms of the geometry of constituents. This study may offer a feasible approach towards generating functionally-graded mechanical properties in synthetic materials for improved damage resistance. Published by Elsevier Ltd on behalf of Acta Materialia Inc.
description.department[liu, zengqian ; ritchie, robert o.] univ calif berkeley, dept mat sci & engn, berkeley, ca 94720 usa ; [liu, zengqian ; zhu, yankun ; jiao, da ; weng, zhaoyong ; zhang, zhefeng] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china
KeywordGradient Biological Materials Bioinspired Design Structural Orientation Functionally Graded Materials
Subject AreaEngineering, Biomedical ; Materials Science, bioMaterials
Funding OrganizationMultidisciplinary University Research Initiative from the Air Force Office of Scientific Research [AFOSR-FA9550-15-1-0009]; National Natural Science Foundation of China [51501190, 51331007]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/76233
Collection中国科学院金属研究所
Corresponding AuthorRitchie, RO (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.; Zhang, ZF (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Liu, ZQ,Zhu, YK,Jiao, D,et al. Enhanced protective role in materials with gradient structural orientations: Lessons from Nature[J]. ACTA BIOMATERIALIA,2016,44:31-40.
APA Liu, ZQ.,Zhu, YK.,Jiao, D.,Weng, ZY.,Zhang, ZF.,...&Zhang, ZF .(2016).Enhanced protective role in materials with gradient structural orientations: Lessons from Nature.ACTA BIOMATERIALIA,44,31-40.
MLA Liu, ZQ,et al."Enhanced protective role in materials with gradient structural orientations: Lessons from Nature".ACTA BIOMATERIALIA 44(2016):31-40.
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