Bioinspired design of hybrid composite materials
作者机构：Department of Mechanical EngineeringUniversity of Texas at San AntonioSan AntonioTXUSA
出 版 物：《International Journal of Smart and Nano Materials》 (国际智能和纳米材料杂志（英文）)
年 卷 期：2019年第10卷第1期
页 面：90-105,I0004页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：This research was supported by a grant from National Science Foundation(CMMI-1538448) a grant from the University of Texas at San Antonio,Office of the Vice President for Research
主 题：Bioinspired composites material design bone ultrastructure cohesive finite element material damage
摘 要：Mimicking the natural design motifs of structural biological materials is a promising approach to achieve a unique combination of strength and toughness for engineering *** this study,we proposed a 2D computational model,which is a two-hierarchy hybrid composite inspired by the ultrastructural features of *** model is composed of alternating parallel array of two subunits(A&B)mimicking‘mineralized collagen fibril’and‘extrafibrillar matrix’of bone at ultrastructural *** subunit-A is formed by short stiff platelets embedded within a soft *** subunit-B consists of randomly distributed stiff grains bonded by a thin layer of tough adhesive *** assess the performance of the bioinspired design,a conventional unidirectional long-fiber composite made with the same amount of hard and soft phases was *** finite element simulation results indicated that the toughness,strength and elastic modulus of the bioinspired composite was 312%,83%,and 55%of that of the conventional composite,*** toughness improvement was attributed to the prevalent energy-dissipating damage of adhesive phase in subunit-B and crack-bridging by subunit-A,the two major toughening mechanisms in the *** study exemplifies some insights into natural design of materials to gain better material performance.
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