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Title of Journal: Meccanica

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Abbravation: Meccanica

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Springer Netherlands

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DOI

10.1007/bf00793011

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1572-9648

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A mesomechanical analysis of the stress–strain loc

Authors: Ruslan Balokhonov Varvara Romanova Ekaterina Batukhtina Sergey Martynov Aleksandr Zinoviev Olga Zinovieva
Publish Date: 2015/08/04
Volume: 51, Issue: 2, Pages: 319-328
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Abstract

A numerical analysis is presented of the microstructural effects on the deformation and fracture of friction stir welds in aluminium alloys A dynamic boundaryvalue problem in a plane strain formulation is solved numerically by the finitedifference method Experimental polycrystalline microstructures inherent in different weld zones—base material weld nugget and thermomechanically affected zones—were accounted for explicitly in the calculations To simulate the mechanical response of individual grains use was made of an elastic–plastic formulation of the problem accounting for isotropic strain hardening including the Hall–Petch effect and of a fracture model allowing for crack initiation and growth in the regions of maximum equivalent plastic strains Plastic strain and fracture localisation is shown to depend on the strength of welded materials

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