6533b851fe1ef96bd12a986d

RESEARCH PRODUCT

A continuum based fem model for friction stir welding—model development

Livan FratiniRajiv ShivpuriGianluca BuffaGianluca BuffaJiang Hua

subject

Heat-affected zoneMaterials scienceViscoplasticityMechanical EngineeringMetallurgyMechanical engineeringWeld lineWeldingCondensed Matter PhysicsFinite element methodfriction stir welding FEW material flowlaw.inventionMaterial flowFusion weldingMechanics of MaterialslawFriction stir weldingGeneral Materials ScienceSettore ING-IND/16 - Tecnologie E Sistemi Di Lavorazione

description

Although friction stir welding (FSW) has been successfully used to join materials that are difficult-to-weld or unweldeable by fusion welding methods, it is still in its early development stage and, therefore, a scientific knowledge based predictive model is of significant help for thorough understanding of FSW process. In this paper, a continuum based FEM model for friction stir welding process is proposed, that is 3D Lagrangian implicit, coupled, rigid-viscoplastic. This model is calibrated by comparing with experimental results of force and temperature distribution, then is used to investigate the distribution of temperature and strain in heat affect zone and the weld nugget. The model correctly predicts the non-symmetric nature of FSW process, and the relationships between the tool forces and the variation in the process parameters. It is found that the effective strain distribution is non-symmetric about the weld line while the temperature profile is almost symmetric in the weld zone.

yearjournalcountryeditionlanguage
2006-03-01Materials Science and Engineering: A
https://doi.org/10.1016/j.msea.2005.09.040