Modelling the Size Effects on the Mechanical Properties of Micro/Nano Structures
AbstractExperiments on micro- and nano-mechanical systems (M/NEMS) have shown that their behavior under bending loads departs in many cases from the classical predictions using Euler-Bernoulli theory and Hooke’s law. This anomalous response has usually been seen as a dependence of the material properties on the size of the structure, in particular thickness. A theoretical model that allows for quantitative understanding and prediction of this size effect is important for the design of M/NEMS. In this paper, we summarize and analyze the five theories that can be found in the literature: Grain Boundary Theory (GBT), Surface Stress Theory (SST), Residual Stress Theory (RST), Couple Stress Theory (CST) and Surface Elasticity Theory (SET). By comparing these theories with experimental data we propose a simplified model combination of CST and SET that properly fits all considered cases, therefore delivering a simple (two parameters) model that can be used to predict the mechanical properties at the nanoscale. View Full-Text
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Abazari, A.M.; Safavi, S.M.; Rezazadeh, G.; Villanueva, L.G. Modelling the Size Effects on the Mechanical Properties of Micro/Nano Structures. Sensors 2015, 15, 28543-28562.
Abazari AM, Safavi SM, Rezazadeh G, Villanueva LG. Modelling the Size Effects on the Mechanical Properties of Micro/Nano Structures. Sensors. 2015; 15(11):28543-28562.Chicago/Turabian Style
Abazari, Amir M.; Safavi, Seyed M.; Rezazadeh, Ghader; Villanueva, Luis G. 2015. "Modelling the Size Effects on the Mechanical Properties of Micro/Nano Structures." Sensors 15, no. 11: 28543-28562.