Analysis of Temperature and Plastic Flow During Friction Stir Spot Welding Using Particle Method With Elastic-Plastic Model

2008 ◽  
Author(s):  
Shigeki Hirasawa ◽  
Harsha Badarinarayan ◽  
Kazutaka Okamoto ◽  
Toshio Tomimura
Keyword(s):  
Temperature Distribution ◽  
Flow Pattern ◽  
Plastic Flow ◽  
Spot Welding ◽  
Rotation Speed ◽  
Particle Method ◽  
Metal Plate ◽  
Friction Stir Spot Welding ◽  
Friction Stir ◽  
Metal Material

Friction stir spot welding (FSSW) is a new metal-joining process, and a numerical simulation code to calculate optimal welding conditions is desired. In this paper, we analyzed temperature distribution and plastic flow during FSSW process by solving the elastic-plastic deformation equations using the particle method. Calculation results indicate that, temperature distribution is circler patterns and the temperature below the rotation tool is 300 °C at 0.7 s when the diameter of the tool is 8 mm and the rotation speed is 2500 rpm. The material of the metal plate near the outside of the tool protrudes to cause the burr. The calculation result is similar to our experimental result. Plastic flow pattern of material in the metal plate is obtained. The obtained complex flow pattern is important to mix metal material and the weld strength of FSSW. The length of the pin of the tool, the tool diameter, the tool rotation speed, and the tool plunge speed are important parameters for mixing of metal material. The mixing of metal material below the concave shoulder is strong.

scholarly journals Analysis of Temperature and Plastic Flow during Friction Stir Spot Welding Using Particle Method

2009 ◽  
Vol 4 (2) ◽  
pp. 260-271 ◽  
Author(s):  
Shigeki HIRASAWA ◽  
Harsha BADARINARAYAN ◽  
Kazutaka OKAMOTO ◽  
Toshio TOMIMURA ◽  
Tsuyoshi KAWANAMI ◽  
...  
Keyword(s):  
Plastic Flow ◽  
Spot Welding ◽  
Particle Method ◽  
Friction Stir Spot Welding ◽  
Friction Stir

G0601-4-6 Analysis of Temperature and Plastic Flow during Friction Stir Spot Welding using Particle Method

2009 ◽  
Vol 2009.3 (0) ◽  
pp. 43-44
Author(s):  
Shigeki HIRASAWA ◽  
Harsha BADARINARAYAN ◽  
Kazutaka OKAMOTO ◽  
Toshio TOMIMURA ◽  
Tsuyoshi KAWANAMI ◽  
...  
Keyword(s):  
Plastic Flow ◽  
Spot Welding ◽  
Particle Method ◽  
Friction Stir Spot Welding ◽  
Friction Stir

scholarly journals Analysis of effect of tool geometry on plastic flow during friction stir spot welding using particle method

2010 ◽  
Vol 210 (11) ◽  
pp. 1455-1463 ◽  
Author(s):  
Shigeki Hirasawa ◽  
Harsha Badarinarayan ◽  
Kazutaka Okamoto ◽  
Toshio Tomimura ◽  
Tsuyoshi Kawanami
Keyword(s):  
Plastic Flow ◽  
Spot Welding ◽  
Particle Method ◽  
Friction Stir Spot Welding ◽  
Tool Geometry ◽  
Friction Stir

Study of friction stir spot welding for thermotolerant engineering thermoplastic polyimide joints

2021 ◽  
pp. 095440542199561
Author(s):  
Jicheng Gao ◽  
Jiachen Dong ◽  
Sunyi Zhang ◽  
Liang Yu ◽  
Huiming Jin ◽  
...  
Keyword(s):  
Shear Strength ◽  
Spot Welding ◽  
Dwell Time ◽  
Rotation Speed ◽  
Mixing Time ◽  
Friction Stir Spot Welding ◽  
Scanning Calorimetry ◽  
Friction Stir ◽  
Base Materials ◽  
Engineering Plastics

In this research, thermoplastic polyimide (TPI) were welding via friction stir spot welding (FSSW) in order to evaluate the feasibility of the technology. The welding tool with a tri-flute pin was used for keeping the welding effectiveness. The effect of the rotation speed and dwell time on the microstructure and shear strength was studied. The results shows that the number of gap defects between the shoulder affect zone and the pin affect zone decreased with the increase of the rotation speed. The boundary of the shoulder affect zone and the pin affect zone was no clear when increasing the dwell time from 10 s to 20 s. Long dwell time could increase the mixing time and reduce the materials viscosity, which made the structure was denser. The maximal shear strength was obtained 85.5% of the base materials. The differential scanning calorimetry (DSC) results indicated that the melting behaviour of different regions was no obvious difference. It indicated that FSSW had a feasible and potential technology to join the high temperature resistant engineering plastics.

Analysis of plastic flow of the Al alloy joint produced by friction stir spot welding

2009 ◽  
Vol 23 (8) ◽  
pp. 589-596 ◽  
Author(s):  
Mitsuo Fujimoto ◽  
Shinji Koga ◽  
Natsumi Abe ◽  
S. Yutaka Sato ◽  
Hiroyuki Kokawa
Keyword(s):  
Plastic Flow ◽  
Spot Welding ◽  
Friction Stir Spot Welding ◽  
Al Alloy ◽  
Friction Stir

Combined Analysis of Plastic Flow and Temperature Distribution During Friction Stir Welding

2005 ◽  
Author(s):  
Shigeki Hirasawa ◽  
Kazutaka Okamoto ◽  
Satoshi Hirano ◽  
Toshio Tomimura
Keyword(s):  
Finite Element Method ◽  
Temperature Distribution ◽  
Plastic Flow ◽  
Heat Generation ◽  
Shear Force ◽  
Particle Method ◽  
Friction Stir ◽  
Temperature Distributions ◽  
Metal Plates ◽  
Flow Heat

Plastic flow, heat generation by shear force, and temperature distribution during the FSW process were analyzed. The plastic flow was numerically calculated using a particle method and the temperature distribution was calculated using a finite element method. Both analyses were combined. Temperature distributions were calculated by changing conditions of heat generation caused by the friction between the rotating tool and the metal plates. Local temperature distributions near the rotating tool differed for the conditions, but whole temperature distributions were almost same. In the calculation result of the plastic deformation, the heat generation by the shear force occurred about 60% at near the shoulder and 40% at near the pin of the tool.

scholarly journals Analysis of Plastic Flow of the Al Alloy Joint Produced by Friction Stir Spot Welding

2008 ◽  
Vol 26 (1) ◽  
pp. 67-73 ◽  
Author(s):  
Mitsuo FUJIMOTO ◽  
Shinji KOGA ◽  
Natsumi ABE ◽  
Yutaka SATO S. ◽  
Hiroyuki KOKAWA
Keyword(s):  
Plastic Flow ◽  
Spot Welding ◽  
Friction Stir Spot Welding ◽  
Al Alloy ◽  
Friction Stir

Research of Heat Power in Friction Stir Spot Welding

2019 ◽  
Vol 806 ◽  
pp. 81-86
Author(s):  
V. Statsenko ◽  
A. Sukhorada
Keyword(s):  
Heat Input ◽  
Spot Welding ◽  
Rotation Speed ◽  
Friction Stir Spot Welding ◽  
Heat Losses ◽  
High Tech ◽  
Heat Power ◽  
Friction Stir ◽  
Experimental Scheme ◽  
Experimental Tube

Nowadays the most perspective, high-tech and productive process is friction stir spot welding. The most important part of this technology is to determine the temperature of the material in the stir zone. This parameter is easily counted by the amount of the heat input, put in the welding zone. We made experimental researches about the relation of the heat power, therotation speed and the diameter of the working tool. For that purpose an experimental scheme was chosen, which models a welding material (aluminum alloy AMg5) as an experimental tube 20 mm in diameter. The tool (shear steel P6M5) is modeled as a working plate. Measurements of the frictional moments depending on the rotation speed of the experimental working tube during the constant temperature are made on the prepared stand. By the experimental data the specific heat input and the heat power were counted on every concentric ring, 2 mm in width, in the end of the working tool, 20 mm in diameter. Also, the sum of the heat power for the whole tool during various rotation speed terms was counted too. On the stand throughout the experiment were determined all the thermal conductivity heat losses along the rod, which the experimental tube was pinned on, all the working plate heat losses through the gasket towards the working desk and the convection from the surface of the rotating experimental tube to the environment. According the data, any of these losses is from 3 to 10 percent. This is shown in the heat input counting.

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