Reproducing the Extraordinary Mechanical Properties of Biominerals through Multiscale Simulation

通过多尺度模拟再现生物矿物的非凡机械性能

• 批准号: 0855795
• 负责人: Youping Chen
• 金额: $ 30.26万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0855795&HistoricalAwards=false
• 关键词: Reproducing; Extraordinary; Mechanical; Properties; Biominerals

Biominerals represent a unique class of simultaneously strong, stiff, hard and tough composites that have been extensively studied by experimentalists and that to date we have not succeeded to replicate. This proposal aims to develop a fundamental understanding of the origins of the unusual mechanical properties of calcium carbonate biominerals and to reproduce the extraordinary mechanical properties of nacre in computer simulation as a direct result of its architecture and essential composition. This research will (1) establish a simulation tool that predicts the mechanical properties of biominerals from constituent molecules to millimeter-sized specimens, (2) determine the essential molecular structure and function of the organic interfaces that link the multi-level structures of nacre, (3) establish the precise nature of the effect of the hierarchical architecture as well as the organic interfaces on the mechanical properties of calcium carbonate biominerals, and (4) develop a fundamental understanding of the multiscale mechanics of hierarchically-structured composite materials.Success in reproducing the mechanical properties of biominerals in simulations, hence in understanding the mechanisms that give rise to the remarkable mechanical properties of biominerals, will lead to the development of next generation high-strength high-toughness ceramics. Success of this research will also stimulate students? interest in mechanics and mechanical engineering through the fascinating biological world. The research project will involve a diversity of students including female and minority students, undergraduate and graduate students, and will provide these students with an unparalleled opportunity to gain knowledge and to develop skills in an interdisciplinary research area. Computer models and codes developed will be posted for public use and for feedback. Research results will be published in journals and on the internet, and will be presented at conferences, seminars and workshops.

生物矿物代表了一类独特的同时坚固、坚硬、坚硬和坚韧的复合材料，实验人员已经对其进行了广泛研究，但迄今为止我们尚未成功复制。该提案旨在对碳酸钙生物矿物不寻常的机械性能的起源有一个基本的了解，并在计算机模拟中重现珍珠质的非凡机械性能，作为其结构和基本成分的直接结果。 这项研究将（1）建立一个模拟工具，预测从组成分子到毫米大小的样本的生物矿物的机械特性，（2）确定连接珍珠层多层结构的有机界面的基本分子结构和功能， (3) 确定分级结构以及有机界面对碳酸钙生物矿物机械性能影响的精确性质，以及 (4) 对分级结构复合材料的多尺度力学有基本的了解。繁殖模拟生物矿物的机械性能，从而了解生物矿物卓越机械性能的机制，将有助于开发下一代高强度高韧性陶瓷。这项研究的成功也会刺激学生吗？通过迷人的生物世界对机械和机械工程产生兴趣。 该研究项目将涉及多元化的学生，包括女性和少数民族学生、本科生和研究生，并将为这些学生提供无与伦比的机会来获取跨学科研究领域的知识和发展技能。开发的计算机模型和代码将发布以供公众使用和反馈。研究成果将在期刊和互联网上发表，并将在会议、研讨会和讲习班上展示。