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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.76 No.1
- 발행연도
- 2020.1
- 수록면
- 141 - 151 (11page)
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초록· 키워드
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This manuscript tends to investigate influences of nanoscale and surface energy on a static bending and free vibration of piezoelectric perforated nanobeam structural element, for the first time. Nonlocal differential elasticity theory of Eringen is manipulated to depict the long–range atoms interactions, by imposing length scale parameter. Surface energy dominated in nanoscale structure, is included in the proposed model by using Gurtin–Murdoch model. The coupling effect between nonlocal elasticity and surface energy is included in the proposed model. Constitutive and governing equations of nonlocal-surface perforated Euler–Bernoulli nanobeam are derived by Hamilton’s principle. The distribution of electric potential for the piezoelectric nanobeam model is assumed to vary as a combination of a cosine and linear variation, which satisfies the Maxwell’s equation. The proposed model is solved numerically by using the finite-element method (FEM). The present model is validated by comparing the obtained results with previously published works. The detailed parametric study is presented to examine effects of the number of holes, perforation size, nonlocal parameter, surface energy, boundary conditions, and external electric voltage on the electro-mechanical behaviors of piezoelectric perforated nanobeams. It is found that the effect of surface stresses becomes more significant as the thickness decreases in the range of nanometers. The effect of number of holes becomes significant in the region 0.2≤α≤0.8. The current model can be used in design of perforated nano-electro-mechanical systems (PNEMS).
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참고문헌 (57)
참고문헌 신청
Alaa A. Abdelrahman / 2019 / Free and forced analysis of perforated beams / Steel and Composite Structures, An International Journal 31(5):489~502
Khalid H. Almitani / 2019 / On forced and free vibrations of cutout squared beams / Steel and Composite Structures, An International Journal 32(5):643~655
Khalid H. Almitani / 2020 / Stability of perforated nanobeams incorporating surface energy effects / Steel and Composite Structures, An International Journal 35(4):555~566
Alshorbagy, A. E. / 2011 / Free vibration characteristics of a functionally graded beam by finite element method / Appl. Math. Model 35(1):412~425
Ansari, R. / 2015 / Surface stress effect on the vibration and instability of nanoscale pipes conveying fluid based on a size-dependent Timoshenko beam model / Acta Mechanica Sinica 31(5):708~719
Khalid H. Almitani / 2019 / On forced and free vibrations of cutout squared beams / Steel and Composite Structures, An International Journal 32(5):643~655
Khalid H. Almitani / 2020 / Stability of perforated nanobeams incorporating surface energy effects / Steel and Composite Structures, An International Journal 35(4):555~566
Alshorbagy, A. E. / 2011 / Free vibration characteristics of a functionally graded beam by finite element method / Appl. Math. Model 35(1):412~425
Ansari, R. / 2015 / Surface stress effect on the vibration and instability of nanoscale pipes conveying fluid based on a size-dependent Timoshenko beam model / Acta Mechanica Sinica 31(5):708~719
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