Numerical simulation of friction stir welding process

Abstract

Thermo-mechanical simulations of the friction stir butt welding and friction stir spot welding processes were performed for AA5083-H18 sheets, utilizing commercial FVM codes which are based on the Eulerian formulation. For the friction stir butt welding process, the computational fluid dynamics code, STAR-CCM+, was utilized under the steady state condition. Temperature and strain rate histories along the material flow were calculated and simulated temperature distributions (profiles and peak values) were compared with experiments for verification. It was found that by including proper thermal properties of the backing plate (anvil) the accuracy of the simulation results increased significantly. For the friction stir spot welding process, the computational fluid dynamics code, STAR-CD, was utilized under the unsteady condition to understand the effect of pin geometry on material flow and weld strength.

Atomic‐Scale Investigations of H3BO3 and LiOH on Zr(0 0 0 1) Surface: A DFT Study

“…[ 9–13 ] Kim et al. [ 14 ] studied the corrosion behavior of pure single crystal Zr with small size in 360 °C and 18.6 MPa condition, and the results showed that the growth rate of oxide film (ZrO 2 ) on the (1 1 2 0) crystal plane was significantly faster than that on the (0 0 0 1) crystal plane. Zhou et al.…”

“…Zirconium alloy was in the form of a hexagonal close-packed (HCP) crystal structure and researchers also have done a lot of studies on its anisotropic corrosion. [9][10][11][12][13] Kim et al [14] studied the corrosion behavior of pure single crystal Zr with small size in 360 °C and 18.6 MPa condition, and the results showed that the growth rate of oxide film (ZrO 2 ) on the (1 1 2 0) crystal plane was significantly faster than that on the (0 0 0 1) crystal plane. Zhou et al [15] found that the growth of oxide film (ZrO 2 ) presented significant anisotropy when the Zr-4 samples with large grains size (≈0.2-0.8 mm) were corroded in 360 °C LiOH aqueous solution.…”

Mathematical Modeling of Friction Plug Welding with Preheating Effect

“…Dongun Kim et al calculated the temperature distribution and plastic deformation during FSW process, continuity and momentum equation as well as energy equation are solved with temperature dependent or temperature and strain rate dependent material properties. The constitutive law (for the mechanical strain) was assumed [2]. Rosenthal did the most important early work on the theory of the effect of moving sources of heat.…”

An Implicit Algorithm Based on Continuous Moving Least Square to Simulate Material Mixing in Friction Stir Welding Process

“…It has been investigated by several authors considering thermal or thermomechanical framework [2][3][4][5][6][7][8]. The difficulty in modeling this welding type resides to large deformations generated by the material mixing.…”