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TORSIONAL PROPERTIES OF METALLIC NANOSPRINGS

ISSN号：0894-9166
期刊名称：《固体力学学报：英文版》
时间：0
分类：O33[理学—一般力学与力学基础;理学—力学] TG146.21[金属学及工艺—金属材料;一般工业技术—材料科学与工程;金属学及工艺—金属学]
作者机构：[1]State Key Laboratory of Structure Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, China, [2]Department of Civil and Environmental Engineering, University of Missouri, Columbia, Missouri 65211-2200, USA
相关基金：Project supported by the National Natural Science Foundation of China （Nos.10721062, 90715037, 10728205 and 10902021）, the Program for Changjiang Scholars and Innovative Research Team in University of China （PCSIRT）, the 111 Project （No.B08014） and the National Key Basic Research Special Foundation of China （No.2010CB832704）.

作者： Yonggang Zheng[1], Hongwu Zhang[1], Zhen Chen[1,2]

关键词：力学性能, 金属铜, 扭转角度, 作者, 连续介质力学, 嵌入原子势, 抛物线规律, 分子力学, nanospring, copper, torsional property, molecular mechanics

中文摘要：

基于分子的力学和嵌入原子的潜力，金属性的铜 nanosprings 的扭力的机械行为在这份报纸被调查。nanospring 的扭转系数被根据一条寓言的法律适合势能对扭转角度的曲线获得。nanospring 的几何学在扭转系数上有强壮的 inuence，这被发现。随电线半径和螺旋半径的增加， nanospring 的扭转系数增加。然而，它随螺旋沥青和拐弯的增加减少。经典春天理论对扭力的 nanosprings 无效，这也被发现。计算扭转系数比从经典春天理论的断言高并且比相应的稳固的杆的低。另外，连续统力学被显示不适用描述 nanosprings 的扭力的行为。这些调查结果可能在 nanodevices 提供可用性的更好的理解和 nanosprings 的功能。

英文摘要：

Based on molecular mechanics and the embedded-atom potential, the torsional mechanical behaviors of metallic copper nanosprings are investigated in this paper. The torsion coefficient of the nanospring is obtained by fitting the curve of potential energy versus torsion angle according to a parabolic law. It is found that the geometry of nanospring has a strong influence on the torsion coefficient. With the increase of the wire radius and the helix radius, the torsion coefficient of the nanospring increases. However, it decreases with the increase of the helix pitch and turns. It is also found that the classic spring theory is invalid to torsional nanosprings. The calculated torsion coefficient is higher than the predication from the classic spring theory and is lower than that of the corresponding solid rod. In addition, the continuum mechanics is shown to be inapplicable to describe the torsional behavior of nanosprings. These findings might provide a better understanding of the usability and functionality of nanosprings in nanodevices.

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