—This paper presents a methodology for modeling
the transient thermal and mechanical responses without
computing the heat generated by friction or plastic deformation.
The externally applied heat source accounts for the heat
generated from tool movement. The novel heat source model
includes two parts: surface heat flux at the shoulder-workpiece
interface and nodal heat generation in the material that should
have been displaced by the tool. The heat source algorithm is
described through equations and flow charts. This thermal
model was shown to predict a temperature history in good
agreement with experimentally measured results. The
mechanical interaction between the contacting surfaces was
modelled with contact elements. However the analysis failed to
converge with the contact pairs active. For the analysis without
contact pairs, the predicted longitudinal direction stresses
matched well with experiment but the transverse direction
stresses were significantly different.
—Finite element analysis, friction stir welding,
thermo-mechanical modeling, sequential method.
The all authors are with the Zhejiang Sci-Tech University, Hangzhou,
310018 China (e-mail: lihongjun@ zstu.edu.cn).
Cite: Simplified Thermo-Mechanical Modeling of Friction Stir
Welding with a Sequential FE Method, "Simplified Thermo-Mechanical Modeling of Friction Stir
Welding with a Sequential FE Method," International Journal of Modeling and Optimization vol. 4, no. 5, pp. 410-416, 2014.