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heidarpour, behzad, Rahi, Abbas. (1400). Analytical investigation of vibration behavior of damaged micro sensor based on modified couple stress theory. نشریه علمی دانشگاه سیستان و بلوچستان, 10(1), 14-20. doi: 10.22111/cnmst.2023.43988.1232
behzad heidarpour; Abbas Rahi. "Analytical investigation of vibration behavior of damaged micro sensor based on modified couple stress theory". نشریه علمی دانشگاه سیستان و بلوچستان, 10, 1, 1400, 14-20. doi: 10.22111/cnmst.2023.43988.1232
heidarpour, behzad, Rahi, Abbas. (1400). 'Analytical investigation of vibration behavior of damaged micro sensor based on modified couple stress theory', نشریه علمی دانشگاه سیستان و بلوچستان, 10(1), pp. 14-20. doi: 10.22111/cnmst.2023.43988.1232
heidarpour, behzad, Rahi, Abbas. Analytical investigation of vibration behavior of damaged micro sensor based on modified couple stress theory. نشریه علمی دانشگاه سیستان و بلوچستان, 1400; 10(1): 14-20. doi: 10.22111/cnmst.2023.43988.1232

Analytical investigation of vibration behavior of damaged micro sensor based on modified couple stress theory

Challenges in Nano and Micro Scale Science and Technology
دوره 10، شماره 1، خرداد 2022، صفحه 14-20    اصل مقاله (490.63 K)
نوع مقاله: Original Research Paper
شناسه دیجیتال (DOI): 10.22111/cnmst.2023.43988.1232
نویسندگان
behzad heidarpour1؛ Abbas Rahi* 2
1Faculty of Mechanical and Energy Engineering, Shahid Beheshti University, Tehran, Iran
2Faculty of Mechanical and Energy Engineering, Shahid Beheshti University, Tehran, Iran
چکیده
Due to the extensive development and increasing use of microsystems, it is important to predict the behavior of these structures, especially their vibration behavior. In this study, a micro sensor that has been damaged by a crack is investigated. The damaged micro sensor is modeled as a micro beam with a crack. In this modeling, the crack is modeled as a torsion spring. In the modeling, flexoelectric effect, piezoelectric effect, and electric field caused by the applied voltage have been considered. After mathematical modeling, the governing equations have been extracted using Hamilton's principle based on the modified couple stress theory(MCST). The results of the analytical solution of the equations show that increasing the voltage applied to the micro sensor causes the natural frequency to increase and increasing the piezoelectric constant causes the effective stiffness of the micro structure to increase and as a result the natural frequency increases. Also, the results show that changing the flexoelectric constant in the micro sensor does not significantly change the natural frequency of the system.
کلیدواژه‌ها
Flexoelectric؛ Micro beam؛ MCST؛ Crack؛ Natural frequency
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