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Steel and Composite Structures Volume 28, Number 2, July25 2018 , pages 195-207 DOI: https://doi.org/10.12989/scs.2018.28.2.195 |
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Reliability analysis-based conjugate map of beams reinforced by ZnO nanoparticles using sinusoidal shear deformation theory |
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Behrooz Keshtegar and Reza Kolahchi
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| Abstract | ||
| First-order reliability method (FORM) is enhanced based on the search direction using relaxed conjugate reliability (RCR) approach for the embedded nanocomposite beam under buckling failure mode. The RCR method is formulated using discrete conjugate map with a limited scalar factor. A dynamical relaxed factor is proposed to control instability of proposed RCR, which is adjusted using sufficient descent condition. The characteristic of equivalent materials for nanocomposite beam are obtained by micro-electro-mechanical model. The probabilistic model of nanocomposite beam is simulated using the sinusoidal shear deformation theory (SSDT). The beam is subjected to external applied voltage in thickness direction and the surrounding elastic medium is modeled by Pasternak foundation. The governing equations are derived in terms of energy method and Hamilton | ||
| Key Words | ||
| reliability analysis; nanocomposite beam; buckling force; relaxed conjugate reliability method | ||
| Address | ||
| (1) Behrooz Keshtegar: Department of Civil Engineering, Faculty of Engineering, University of Zabol, P.B. 9861335-856, Zabol, Iran; (2) Reza Kolahchi: Department of Civil Engineering, Meymeh Branch, Islamic Azad University, Meymeh, Iran. | ||