Determining the effects of surface elasticity and surface stress by measuring the shifts of resonant frequencies

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Determining the effects of surface elasticity and surface stress by measuring the shifts of resonant frequencies
	Liu Y; Zhang Y(张吟)
	2016
会议名称	23rd International Congress on Sound and Vibration (ICSV)
会议日期	JUL 10-14, 2016
会议地点	Athens, GREECE
关键词	ELASTICITY SENSOR MASS
通讯作者	Zhang, Y (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China.
中文摘要	As a structure size scales down to the order of a micron or smaller, there can be a significant changes in the mechanical properties as compared to its macroscopic ones. The nonlocal theories were developed to explain those changes, in which several material constants are involved. Those material constants are (assumed to be) related with the lattice length, grain size, inclusion and defects such as crack, dislocation and void, etc. However, there is still no a clear physical picture for those constants. Various experiments have been conducted to determine those material constants, which always use several specimens and often result in controversial data. Here we propose to use only one specimen and the shifts of its resonant frequencies to determine those material constants. The mechanical properties of a submicron structure is very sensitive to the defects, which is a main reason for the inconclusive results of the above experiments with several specimens. The presence of the material constants can have significant influence on the micro/nanostructure resonant frequencies. By measuring the shifts of resonant frequencies for one specimen, we determine those material constants by solving an inverse problem. Physically, the inverse problem can be solved because the material constants impact on one resonant frequency differently and the shifts of different resonant frequencies are different to one another. This inverse problem solving method gives not only a new but also a more reliable approach of experimentally determining the material constants.
收录类别	CPCI-S
会议主办者	The research was supported by the National Natural Science Foundation of China (NSFC no. 11372321).
会议网址	10.1098/rspa.2013.0449
会议录	PROCEEDINGS OF THE 23RD INTERNATIONAL CONGRESS ON SOUND AND VIBRATION: FROM ANCIENT TO MODERN ACOUSTICS
语种	英语
ISBN号	978-960-99226-2-3
WOS记录号	WOS:000388480403116
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/60186]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Liu Y,Zhang Y. Determining the effects of surface elasticity and surface stress by measuring the shifts of resonant frequencies[C]. 见:23rd International Congress on Sound and Vibration (ICSV). Athens, GREECE. JUL 10-14, 2016.10.1098/rspa.2013.0449.