New PDF release: Amplification of Nonlinear Strain Waves in Solids

By Alexey V. Porubov

ISBN-10: 9812383263

ISBN-13: 9789812383266

This booklet treats difficulties concurrently: sequential analytical attention of nonlinear pressure wave amplification and choice in wave publications and in a medium; demonstration of using even specific analytical suggestions to nonintegrable equations in a layout of numerical simulation of unsteady nonlinear wave techniques. The textual content comprises a variety of specific examples of the tension wave amplification and choice attributable to the effect of an exterior medium, microstructure, relocating aspect defects, and thermal phenomena. the most positive aspects of the publication are: (1) nonlinear versions of the stress wave evolution in a rod subjected by means of a variety of dissipative/active elements; (2) an analytico-numerical method for strategies to the governing nonlinear partial differential equations with dispersion and dissipation.

This e-book is key for introducing readers in mechanics, mechanical engineering, and utilized arithmetic to the concept that of lengthy nonlinear pressure wave in one-dimensional wave publications. it's also appropriate for self-study by means of pros in all parts of nonlinear physics.

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Extra info for Amplification of Nonlinear Strain Waves in Solids

Example text

At coefficient values we used the value of u m a x decreases with the increase of s (s is not large in the asymptotic solution), while the exact solution predicts the same behavior only for positive values of s. When s = c = 0 the behavior of the solution differs from the previous one. Having the same values for b, d, f we obtain that increase of positive values of r yields a decrease in the velocity and an increase in the amplitude of the solitary waves. The number of solitary waves decreases.

17 Temporal evolution of an initial solitary wave resulting in a selection: a) from below, b) from above. amplitude decreases while its width increases. Sometimes it happens that the increase/decrease of A(T) takes place not up to infinity/zero but to the finite value A*. Usually this value is defined by the governing equation coefficients, hence, by the physical parameters of the problem. To put Basic Fig. 34) ( solid line). this another way, the parameters of the resulted steady wave are selected.

6). At the same time, the stage of forthcoming evolution of already gen- Basic concepts 19 A A A A A A : • • • A 100 200 300 400 500 X Fig. 10 Evolution of the initial Gaussian profile in the 5th-order KdV case, / = —50. erated solitary waves is not so sensitive to the value of b, while other analytical restrictions on the coefficients become more important. 6). 8). When c > 0, / < 0 all above mentioned inequalities are satisfied. 2. The velocity of the waves increases also, the width (proportional to 1/fc) decreases, while the amplitude remains practically one and the same.

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Amplification of Nonlinear Strain Waves in Solids by Alexey V. Porubov

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