A Peierls Perspective on Mechanisms of Atomic Friction
佩尔斯对原子摩擦机制的看法
基本信息
- 批准号:0900027
- 负责人:
- 金额:$ 19.8万
- 依托单位:
- 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:2009-07-01 至 2014-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The objective of this research is to develop a Peierls perspective on the atomic-friction mechanisms from the spatiotemporal evolution of interface defect structures. Despite a quantitative experimental capability of examining nanoscale frictional behavior, existing modeling efforts, such as Tomlinson-type models or molecular simulations, are still unable to quantitatively explain the effects of lattice incommensurability, rate- and temperature-dependence, etc. A Peierls-type framework will be established to replace singular defect model by the inhomogeneous slip field on the interface. Experimental observations, such as structural lubricity, frictional anisotropy, and contact size dependence, can be explained as a consequence of initiation and multiplication of interface dislocations and their interactions with pre-existing interface defects. From the kinetics standpoint, the proposed work will examine the spatially inhomogeneous nature of the rate-determining process, accurately calculate the activation energy with respect to the interface defects, and thus explain the thermally activated frictional behavior.The uniqueness of the proposed work, as compared to a vast literature in this field, is the ability to quantitatively predict the atomic processes that govern the spatiotemporal evolution of the interface defects during friction. This viewpoint enables quantitative experimental comparisons and resolves drawbacks and difficulties of existing modeling efforts. It will open a broad door for both undergraduate and graduate students to participate in a multi-disciplinary education/research environment, and thus advances and enhances focused research and education activities in the PI?s institute. The PI will develop new instructional materials and hands-on computational demonstrations for incorporation into a variety of outreach and diversity programs, and thus promote the interests of high school and college students in science and engineering careers, as well as the engagement of public awareness.
这项研究的目的是从界面缺陷结构的时空演化中对原子摩擦机制进行PEIERLS的观点。尽管测量纳米级摩擦行为具有定量的实验能力,但现有的建模工作(例如Tomlinson-type模型或分子模拟)仍无法定量解释晶格不强度,速率和温度依赖性的不可固定性的影响。可以解释实验性观察,例如结构润滑性,摩擦各向异性和接触尺寸依赖性,是由于界面脱位的起始和繁殖及其与预先存在的界面缺陷的相互作用的结果。从动力学的角度来看,提出的工作将检查速率定位过程的空间不均匀性质,准确地计算出相对于界面缺陷的激活能量,从而解释了热激活的摩擦行为。与该领域的广泛文献相比,所提议的工作的独特性是量化的,是量化的范围,即定量的范围,以量化为准。摩擦期间的缺陷。该观点可以进行定量的实验比较,并解决现有建模工作的缺点和困难。它将为本科和研究生参加多学科教育/研究环境打开宽阔的大门,从而进步并增强PI研究所的集中研究和教育活动。 PI将开发新的教学材料和动手计算示范,以纳入各种外展和多样性计划,从而促进高中和大学生在科学和工程职业中的利益,以及公众意识的参与。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)

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数据更新时间:2024-06-01
Yanfei Gao其他文献
Scale dependence of interface dislocation storage governing the frictional sliding of single asperities
控制单个粗糙体摩擦滑动的界面位错存储的尺度依赖性
- DOI:10.1088/0965-0393/24/6/06501010.1088/0965-0393/24/6/065010
- 发表时间:2016-082016-08
- 期刊:
- 影响因子:1.8
- 作者:Zhiwen Gao;Wei Zhang;Yanfei GaoZhiwen Gao;Wei Zhang;Yanfei Gao
- 通讯作者:Yanfei GaoYanfei Gao
Nanoscale incipient asperity sliding and interface micro-slip assessed by the measurement of tangential contact stiffness
通过测量切向接触刚度评估纳米级初始粗糙滑动和界面微滑动
- DOI:
- 发表时间:20062006
- 期刊:
- 影响因子:0
- 作者:Yanfei Gao;B. Lucas;J. C. Hay;W. Oliver;G. PharrYanfei Gao;B. Lucas;J. C. Hay;W. Oliver;G. Pharr
- 通讯作者:G. PharrG. Pharr
[Apoptosis of type II alveolar epithelial cell induced by bleomycin in lung fibrotic rat].
博莱霉素诱导肺纤维化大鼠II型肺泡上皮细胞凋亡的研究
- DOI:
- 发表时间:20072007
- 期刊:
- 影响因子:0
- 作者:L. Kong;Yanfei Gao;Ji;J. Niu;Xueying ZhangL. Kong;Yanfei Gao;Ji;J. Niu;Xueying Zhang
- 通讯作者:Xueying ZhangXueying Zhang
Tailored design of polyamide nanofiltration membrane interlayer via dynamic-polyphenol polymerization for complex inorganic salts separation
- DOI:10.1016/j.memsci.2024.12324310.1016/j.memsci.2024.123243
- 发表时间:2024-12-012024-12-01
- 期刊:
- 影响因子:
- 作者:Ruixian Zhang;Wenjie Chen;Yanfei Gao;Heping Li;Yanyue Lu;Zeguang ZhouRuixian Zhang;Wenjie Chen;Yanfei Gao;Heping Li;Yanyue Lu;Zeguang Zhou
- 通讯作者:Zeguang ZhouZeguang Zhou
Effects of Glass-Forming Metallic Film on the Fatigue Behavior of C-2000 Ni-Based Alloy
玻璃形成金属膜对C-2000镍基合金疲劳行为的影响
- DOI:10.1557/proc-0903-z14-1310.1557/proc-0903-z14-13
- 发表时间:20052005
- 期刊:
- 影响因子:0
- 作者:F. X. liu;C. Chiang;J. Chu;Yanfei Gao;P. LiawF. X. liu;C. Chiang;J. Chu;Yanfei Gao;P. Liaw
- 通讯作者:P. LiawP. Liaw
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Yanfei Gao的其他基金
IUCRC Phase III University of Tennessee, Knoxville (UTK): Manufacturing and Materials Joining Innovation Center (Ma2JIC)
IUCRC 第三期田纳西大学诺克斯维尔分校 (UTK):制造和材料连接创新中心 (Ma2JIC)
- 批准号:20527292052729
- 财政年份:2021
- 资助金额:$ 19.8万$ 19.8万
- 项目类别:Continuing GrantContinuing Grant
Collaborative Research: In situ Diffraction and Cohesive-Zone Studies of the Fatigue-Crack-Growth Behavior in Mg Alloys
合作研究:镁合金疲劳裂纹扩展行为的原位衍射和内聚区研究
- 批准号:18096401809640
- 财政年份:2018
- 资助金额:$ 19.8万$ 19.8万
- 项目类别:Standard GrantStandard Grant
Strain-Induced Ordering, Assembly, and Defects in Nanoscale Thin-Film Heterostructures
纳米级薄膜异质结构中应变诱导的有序、组装和缺陷
- 批准号:13002231300223
- 财政年份:2013
- 资助金额:$ 19.8万$ 19.8万
- 项目类别:Standard GrantStandard Grant
Indentation-Induced Damage Initiation and Evolution in Single- and Poly-Crystalline Ceramics
单晶和多晶陶瓷中压痕诱发的损伤萌生和演变
- 批准号:09267980926798
- 财政年份:2009
- 资助金额:$ 19.8万$ 19.8万
- 项目类别:Standard GrantStandard Grant
Scale-Dependent Crystal Plasticity and Nanoindentation-Induced Dislocation Microstructure
尺寸相关的晶体塑性和纳米压痕引起的位错微观结构
- 批准号:08001680800168
- 财政年份:2008
- 资助金额:$ 19.8万$ 19.8万
- 项目类别:Standard GrantStandard Grant
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