TY - JOUR

T1 - Application of Adaptive Element-Free Galerkin Method to Simulate Friction Stir Welding of Aluminum

AU - Talebi, Hossein

AU - Froend, Martin

AU - Klusemann, Benjamin

N1 - International Conference on the Technology of Plasticity, ICTP 2017, 17-22 September 2017, Cambridge, United Kingdom

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The modeling of friction stir welding (FSW) is challenging as severe plastic deformation is present. This is in particular the case as typical finite element methods are employed. In this study we use a meshfree technique to model the material flow during the FSW process. We employ the Element-Free Galerkin method (EFG) as approximation method. A mortar contact is used to account for the stirring effect and heat generation from the frictional contact. A two-way adaptive method (rh-adaptive) during the coupled thermomechanical process is used to overcome potential numerical problems arising from the extensive mesh distortion and material deformation. This means, the mesh is globally refined with perusing an anisotropic tetrahedral mesh (h-adaptive). At the same time, a completely new mesh is built based on the old mesh (r-adaptive). Finally, we perform the simulation method on an aluminum sheet with a cylindrical tool to exemplarily show the applicability of the adaptive Element-Free Galerkin method. In future work, the obtainable deformation and temperature history from the thermomechanical simulation will be used to predict the final micro-structure after the welding process.

AB - The modeling of friction stir welding (FSW) is challenging as severe plastic deformation is present. This is in particular the case as typical finite element methods are employed. In this study we use a meshfree technique to model the material flow during the FSW process. We employ the Element-Free Galerkin method (EFG) as approximation method. A mortar contact is used to account for the stirring effect and heat generation from the frictional contact. A two-way adaptive method (rh-adaptive) during the coupled thermomechanical process is used to overcome potential numerical problems arising from the extensive mesh distortion and material deformation. This means, the mesh is globally refined with perusing an anisotropic tetrahedral mesh (h-adaptive). At the same time, a completely new mesh is built based on the old mesh (r-adaptive). Finally, we perform the simulation method on an aluminum sheet with a cylindrical tool to exemplarily show the applicability of the adaptive Element-Free Galerkin method. In future work, the obtainable deformation and temperature history from the thermomechanical simulation will be used to predict the final micro-structure after the welding process.

KW - Adaptivity

KW - Friction Stir Welding

KW - Meshfree Methods

KW - Mechanik

KW - Reibrührschweißen

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=85036651475&partnerID=8YFLogxK

U2 - 10.1016/j.proeng.2017.10.1024

DO - 10.1016/j.proeng.2017.10.1024

M3 - Conference article in journal

AN - SCOPUS:85036651475

VL - 207

SP - 580

EP - 585

JO - Procedia Engineering

JF - Procedia Engineering

SN - 1877-7058

M1 - 137838

ER -