CDS&E: From Weakness to Strength in Bio-Composite Materials by Multiscale Modeling

CDS

• 批准号: 1306065
• 负责人: Xianqiao Wang
• 金额: $ 20.46万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1306065&HistoricalAwards=false
• 关键词: CDS& Weakness; Strength; Bio; Composite

The research objective of this award is to hierarchically design bio-composite materials that have outstanding mechanical properties through the paradox of ?strength? from ?weakness? inspired by how natural bone is made. The researchers will therefore seek a more fundamental understanding of these natural materials? intricate hierarchical structures, scale-bridging mechanics, and material components through this award. This will be accomplished through the following research activities: (i) developing an atom-based continuum modeling tool that enables concurrent multiscale modeling and simulation of materials from atomic building blocks to macroscopic systems; (ii) determining a systematic understanding of mechanical behaviors at the interface between proteins and minerals in the collagen fibrils; (iii) establishing the multiscale structure-property relations in bone materials through the concurrent atomistic/continuum investigation of fibril arrays and the osteons structures. By establishing the precise relation between the structural hierarchy and the mechanical properties, and based on the design strategies extracted from bone materials, this research will establish guidelines for bottom-up hierarchal design of engineered bio-composite materials to have high strength, high stiffness and high toughness.If successful, the results of this research will advance the understanding of bio-inspired composites and provide transformative ideas to achieve the goal of synthesizing bio-inspired materials by design, thereby addressing current limitation of synthetic composites. It will also bring new concepts to the fields of materials science, mechanical engineering, and mechanics of materials at various length scales. The results will provide a unique opportunity to establish a multidisciplinary learning and training program that transcends the traditional boundaries between academic disciplines and offers undergraduate and graduate students, especially those from underrepresented groups, an integrated approach of team research and career development. Moreover, the results will be integrated to improve and enrich existing engineering courses at University of Georgia.

该奖项的研究目标是通过“强度”悖论分层设计具有出色机械性能的生物复合材料。来自？弱点？灵感来自于天然骨骼的形成方式。研究人员是否会因此寻求对这些天然材料更根本的了解？该奖项揭示了复杂的层次结构、尺度桥接机制和材料成分。这将通过以下研究活动来实现：（i）开发基于原子的连续介质建模工具，能够对从原子构建块到宏观系统的材料进行并发多尺度建模和模拟； (ii) 确定对胶原原纤维中蛋白质和矿物质之间界面的机械行为的系统理解； （iii）通过原纤维阵列和骨结构的同时原子/连续研究，建立骨材料的多尺度结构-性能关系。 通过建立结构层次与力学性能之间的精确关系，并基于从骨材料中提取的设计策略，该研究将为具有高强度、高刚度和高韧性的工程生物复合材料建立自下而上的层次设计指南。如果成功，该研究结果将增进对仿生复合材料的理解，并为实现仿生材料合成的目标提供变革性思路。 设计，从而解决合成复合材料的当前限制。它还将为材料科学、机械工程和各种长度尺度的材料力学领域带来新概念。研究结果将为建立跨学科学习和培训计划提供独特的机会，该计划超越学科之间的传统界限，为本科生和研究生，特别是来自代表性不足群体的学生，提供团队研究和职业发展的综合方法。此外，研究结果将被整合以改进和丰富佐治亚大学现有的工程课程。