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• W3026349898 abstract "We develop a novel nonlocal model of dislocations based on the framework of peridynamics. By embedding interior discontinuities into the nonlocal constitutive law, the displacement jump in the Volterra dislocation model is reproduced, intrinsic singularities in classical elasticity are regularized, and the surface effect in previous peridynamics models is avoided. The extended embedded discontinuity peridynamics overcomes unphysical dissipation in treating discontinuity and is still easy to be solved with the particle-based meshless method. The properties of the proposed dislocation model are compared with classical elasticity solutions under the case of an edge dislocation, double edge dislocations, a screw dislocation and a circular dislocation loop. Numerical results show a high consistency in displacement field while no singularity appears in the peridynamics model, the interaction force is in agreement with be the Peach-Koehler formula down to the core region and high accuracy can be reached in 3D with limited computation cost. The proposed model provides a feasible tool for multiscale modeling of dislocations. Though dislocation is modeled as pre-defined displacement jump, it is straightforward to extend the method to model various fracture conditions." @default.
• W3026349898 created "2020-05-29" @default.
• W3026349898 creator A5050865439 @default.
• W3026349898 creator A5060565811 @default.
• W3026349898 date "2020-05-15" @default.
• W3026349898 modified "2023-10-16" @default.
• W3026349898 title "A Nonlocal Model for Dislocations with Embedded Discontinuity Peridynamics" @default.
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• W3026349898 doi "https://doi.org/10.48550/arxiv.2005.09076" @default.
• W3026349898 hasPublicationYear "2020" @default.
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