Size-dependent on vibration and flexural sensitivity of atomic force microscope | ||
| Journal of Computational Applied Mechanics | ||
| مقاله 27، دوره 50، شماره 1، 2019، صفحه 191-196 اصل مقاله (645.37 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/jcamech.2018.250335.233 | ||
| نویسندگان | ||
| Reza Javidi1؛ Hamid Haghshenas Gorgani2؛ Mohsen Mahdavi Adeli* 3 | ||
| 1School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran | ||
| 2Engineering Graphics Center, Sharif University of Technology, Tehran, Iran | ||
| 3Department of Mechanical Engineering, Sousangerd Branch, Islamic Azad University, Sousangerd, Iran | ||
| چکیده | ||
| In this paper, the free vibration behaviors and flexural sensitivity of atomic force microscope cantilevers with small-scale effects are investigated. To study the small-scale effects on natural frequencies and flexural sensitivity, the consistent couple stress theory is applied. In this theory, the couple stress is assumed skew-symmetric. Unlike the classical beam theory, the new model contains a material-length-scale parameter and can capture the size effect. For this purpose, the Euler–Bernoulli beam theory is used to develop the AFM cantilever. The tip interacts with the sample that is modeled by a spring with constant of. The equation of motion is obtained through a variational formulation based on Hamilton’s principle. In addition, the analytical expressions for the natural frequency and sensitivity are also derived. At the end, some numerical results are selected to study the effects of material-length-scale parameter and dimensionless thickness on the natural frequency and flexural sensitivity. | ||
| کلیدواژهها | ||
| consistent couple stress theory؛ atomic force microscope (AFM)؛ Euler–Bernoulli beam؛ Hamilton’s principle؛ Sensitivity | ||
| مراجع | ||
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