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Fractional Nonlocal Elasticity and Solutions for Straight Screw and Edge Dislocations

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Abstract

Nonlocal elasticity assumes integral stress constitutive equation, takes into account interatomic long-range forces, reduces to the classical theory of elasticity in the long wave-length limit and to the atomic lattice theory in the short wave-length limit. In this paper, we propose the nonlocal elasticity theory with the kernel (the weight function in the integral stress constitutive equation) which is the Green function of the Cauchy problem for the fractional diffusion equation and is expressed in terms of the Mainardi function and Wright function being the generalizations of the exponential function. The solutions for the straight screw and edge dislocations in an infinite solid are obtained in the framework of the proposed theory.

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  1. Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, 42-200, Czestochowa, Poland

    Y. Povstenko

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Russian Text © The Author(s), 2019, published in Fizicheskaya Mezomekhanika, 2020, Vol. 23, No. 2, pp. 35–44.

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Povstenko, Y. Fractional Nonlocal Elasticity and Solutions for Straight Screw and Edge Dislocations. Phys Mesomech 23, 547–555 (2020). https://doi.org/10.1134/S1029959920060107

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