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Geomechanics and Engineering Volume 28, Number 5, March10 2022 , pages 455-461 DOI: https://doi.org/10.12989/gae.2022.28.5.455 |
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Numerical assessment of nonlocal dynamic stability of graded porous beams in thermal environment rested on elastic foundation |
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Mouayed H.Z. Al-Toki, Hayder A.K. Ali, Nadhim M. Faleh and Raad M. Fenjan
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| Abstract | ||
| Numerical assessment of the dynamic stability behavior of nonlocal beams rested on elastic foundation has been provided in the present research. The beam is made of fucntional graded (FG) porous material and is exposed to thermal and humid environments. It is also consiered that the beam is subjected to axial periodic mechanical load which especific exitation frequency leading to its instability behavior. Beam modeling has been performed via a two-variable theory developed for thick beams. Then, nonlocal elasticity has been used to establish the governing equation which are solved via Chebyshev-Ritz-Bolotin method. Temperature and moisture variation showed notable effects on stability boundaries of the beam. Also, the stability boundaries are affected by the amount of porosities inside the material. | ||
| Key Words | ||
| beam theory; dynamic stability; nonlocal elasticity; porosities; thermal load | ||
| Address | ||
| Mouayed H.Z. Al-Toki: 1Middle Technical University, Technical College, Baghdad, Iraq Hayder A.K. Ali, Nadhim M. Faleh and Raad M. Fenjan: Al Mustansiriah University, Engineering Collage P.O. Box 46049, Bab Muadum, Baghdad 10001, Iraq | ||