Nonlocal EulerBernoulli Beam Theories

Name: Nonlocal EulerBernoulli Beam Theories
Brand: Springer Nature
SKU: 9783030697877
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Nonlocal EulerBernoulli Beam Theories

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Springer Nature

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9783030697877

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This book presents a comparative study on the static responses of the Euler-Bernoulli beam governed by nonlocal theories, including the Eringens stress-gradient beam theory, the Mindlins strain-gradient beam theory, the higher-order beam theory and the peridynamic beam theory. Benchmark examples are solved analytically and numerically using these nonlocal beam equations, including the simply-supported beam, the clamped-clamped beam and the cantilever beam. Results show that beam deformations governed by different nonlocal theories at different boundary conditions show complex behaviors. Specifically, the Eringens stress-gradient beam equation and the peridynamic beam equation yield a much softer beam deformation for simply-supported beam and clamped-clamped beam, while the beam governed by the Mindlins strain-gradient beam equation is much stiffer. The cantilever beam exhibits a completely different behavior. The higher-order beam equation can be stiffer or softer depending on thevalues of the two nonlocal parameters. Moreover, the deformation fluctuation of the truncated order peridynamic beam equation is observed and explained from the singularity aspect of the solution expression. This research casts light on the fundamental explanation of nonlocal beam theories in nano-electromechanical systems.

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