Abstract
In this paper, we propose a fractional Pasternak-type foundation model to characterize the time-dependent properties of the viscoelastic foundation. With varying fractional orders, the proposed model can govern the traditional Winkler model, Pasternak model, and viscoelastic model. We take the four-edge simply supported rectangular thin plate as an example to analyze the viscoelastic foundation reaction, and obtain the solution of the new governing equation. Theoretical results show that the fractional order has a dramatic influence on the deflection and bending moment. It can be further concluded that the softer foundation will become more time-dependent. Subsequently, the difference between fractional Pasternak-type and Winkler foundation model is presented in this work. The existence of constrained boundary is found to definitely affect deflection and bending moment. Such phenomenon, known as the wall effect, is deeply discussed.
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The work described in this paper was supported by the National Natural Science Foundation of China (no. 11302069, 11372097, 11402075), the 111 project (Grant no. B12032).
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Cai, W., Chen, W. & Xu, W. Fractional modeling of Pasternak-type viscoelastic foundation. Mech Time-Depend Mater 21, 119–131 (2017). https://doi.org/10.1007/s11043-016-9321-0
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DOI: https://doi.org/10.1007/s11043-016-9321-0