3D modelling of material flow in friction stir welding using movable cellular automaton method

Alexey Yu Smolin, Galina M. Eremina, Sergey G. Psakhie

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The paper is devoted to the theoretical investigation of the peculiarities of material flow taking place in friction stir welding (FSW). The investigation was based on 3D computer simulation by the movable cellular automaton (MCA) method, which is a representative of the particle methods in mechanics of materials. Usually, material flow in FSW is simulated based on computational fluid mechanics, which assumes that the material is a continuum and does not take into account the material structure. MCA considers a material as an ensemble of bonded particles. Breaking of inter-particle bonds and formation of new bonds enables simulation of crack nucleation and healing, as well as mas mixing and microwelding. The simulation results showed that using pins of simple shape (cylinder, cone, pyramid) without shoulder results in small scattered displacements of the plasticised material in the workpiece thickness direction. Nevertheless, the optimal ratio of the longitudinal velocity to the rotational speed allows transporting of the welded material around the pin several times and producing the joint of good quality. Applying additional ultrasonic vibration to the pin may lead to better mixing of the plasticized material behind the pin.

Original languageEnglish
Title of host publication5th International Conference on Particle-Based Methods - Fundamentals and Applications, PARTICLES 2017
EditorsE. Onate, P. Wriggers, T. Zohdi, M. Bischoff, D.R.J. Owen
PublisherInternational Center for Numerical Methods in Engineering
Pages420-428
Number of pages9
ISBN (Electronic)9788494690976
Publication statusPublished - 1 Jan 2017
Event5th International Conference on Particle-Based Methods - Fundamentals and Applications, PARTICLES 2017 - Hannover, Germany
Duration: 26 Sep 201728 Sep 2017

Conference

Conference5th International Conference on Particle-Based Methods - Fundamentals and Applications, PARTICLES 2017
CountryGermany
CityHannover
Period26.9.1728.9.17

Keywords

  • Friction Stir Welding
  • Movable Cellular Automata
  • Particle-Based Modelling
  • Severe Plastic Deformation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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