Timoshenko beam model for buckling of nanowires with high-order surface stresses effects

Min Sen Chiu, Tungyang Chen

研究成果: Conference contribution

摘要

High-order surface effects can have a significant effect in the mechanical behavior of micro- and nano-sized materials and structures. In the literature the mathematical framework of surface/interface stresses are generally described by generalized Young-Laplace equations based on membrane theory. A refined model of surface stress, counting into surface stresses as well as surface moments, collectively referred to as high-order surface stress, was recently derived by the authors. This framework allows us to simulate the interface between two neighboring media which may have varying in-plane stress through the thickness of the thin membrane. To illustrate surface stress effects, we consider the critical force of axial buckling of nanowires by accounting various degrees of surface stresses. Using the refined Timoshenko beam theory, we incorporate the high-order surface effect in the simulation of axial buckling of nanowires. The results are compared with the solutions based on conventional surface stress model as well as existing experimental data. This study might be helpful to characterize the mechanical properties of nanowires in a wide range of applications.

原文English
主出版物標題Frontier of Nanoscience and Technology II
頁面281-284
頁數4
DOIs
出版狀態Published - 2012 十月 29
事件2012 International Conference on Frontier of Nanoscience and Technology, ICFNST 2012 - Hong Kong, Hong Kong
持續時間: 2012 七月 262012 七月 27

出版系列

名字Advanced Materials Research
528
ISSN(列印)1022-6680

Other

Other2012 International Conference on Frontier of Nanoscience and Technology, ICFNST 2012
國家Hong Kong
城市Hong Kong
期間12-07-2612-07-27

    指紋

All Science Journal Classification (ASJC) codes

  • Engineering(all)

引用此

Chiu, M. S., & Chen, T. (2012). Timoshenko beam model for buckling of nanowires with high-order surface stresses effects. 於 Frontier of Nanoscience and Technology II (頁 281-284). (Advanced Materials Research; 卷 528). https://doi.org/10.4028/www.scientific.net/AMR.528.281