Thermal energy generation and distribution in friction stir welding of aluminum alloys

Su, Hao; Wu, Chuansong; Pittner, Andreas; Rethmeier, Michael

doi:10.1016/j.energy.2014.09.045

Cited by 150 publications

(55 citation statements)

References 34 publications

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“…(3) and (4) simultaneously, the expressions of friction coefficient and slip rate can be obtained [31]:…”

Section: Calculation Of Friction Coefficient and Slip Ratementioning

confidence: 99%

“…As some researchers have pointed out the limitation of the original equation, especially above the melting point [17,33], a modified constitutive equation is used in this study [31]:…”

Section: Calculation Of Friction Coefficient and Slip Ratementioning

confidence: 99%

“…Furthermore, Qian et al [30] calculated slip rate using tool torque and axial force by assuming friction coefficient to be 0.5. In this study, an improved method for simultaneously calculating friction coefficient and slip rate is employed [31]. The calculation is based on the following assumptions:…”

Section: Calculation Of Friction Coefficient and Slip Ratementioning

confidence: 99%

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Numerical modeling for the effect of pin profiles on thermal and material flow characteristics in friction stir welding

Bachmann

et al. 2015

Materials & Design

154

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“…(3) and (4) simultaneously, the expressions of friction coefficient and slip rate can be obtained [31]:…”

Section: Calculation Of Friction Coefficient and Slip Ratementioning

confidence: 99%

“…As some researchers have pointed out the limitation of the original equation, especially above the melting point [17,33], a modified constitutive equation is used in this study [31]:…”

Section: Calculation Of Friction Coefficient and Slip Ratementioning

confidence: 99%

See 1 more Smart Citation

Numerical modeling for the effect of pin profiles on thermal and material flow characteristics in friction stir welding

Bachmann

et al. 2015

Materials & Design

154

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“…There is a considerable gap in theoretical and numerical studies on the effect of the microstructure formed in the weld and in the near-weld zones on the operating mechanical characteristics of the FSW joint. The overwhelming majority of the theoretical works is concerned with simulations of the welding process and velocity and temperature field distributions around the rotated FSW tool [17][18][19][20][21], including the microstructural evolution during the process [22,23]. Investigations dealing with modelling the mechanical loading of metal pieces butted together by the FSW technique are few in number and have been performed for the most part with the use of essentially idealized macroscopic models [18,[24][25][26][27], even though they were based on a multiscale methodology [28].…”

Section: Introductionmentioning

confidence: 99%

A mesomechanical analysis of the stress–strain localisation in friction stir welds of polycrystalline aluminium alloys

et al. 2015

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A numerical analysis is presented of the microstructural effects on the deformation and fracture of friction stir welds in aluminium alloys. A dynamic boundary-value problem in a plane strain formulation is solved numerically by the finite-difference method. Experimental polycrystalline microstructures inherent in different weld zones-base material, weld nugget, and thermo-mechanically affected zones-were accounted for explicitly in the calculations. To simulate the mechanical response of individual grains, use was made of an elastic-plastic formulation of the problem accounting for isotropic strain hardening, including the Hall-Petch effect, and of a fracture model allowing for crack initiation and growth in the regions of maximum equivalent plastic strains. Plastic strain and fracture localisation is shown to depend on the strength of welded materials.

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“…9,10 To accurately obtain optimal heat production and appropriate welding technology parameters for a variety of workpieces, the numerical simulation technology is the most effective and fastest method. It can not only obtain the structure's temperature distribution and the joint's mechanical properties at a low cost but can also verify the influence of the welding technology parameters on the welding performance.…”

Section: Introductionmentioning

confidence: 99%

Structure design and thermal analysis of a new type of friction stir weld spindle

Luo

Xiao

et al. 2017

Advances in Mechanical Engineering

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This article aims to present a new type of friction stir weld spindle system with 2 degrees of freedom. It explains the thermal-mechanical coupling mechanism between the welding tool and the workpiece, presents simulation of the heat distribution on a friction stir weld spindle under specific welding technology parameters, and provides the type selection and the reference design for temperature-sensitive components such as bearings and motor. The spindle system, which has high stiffness and excellent resistance to overload, is developed in accordance with the welding requirement for aluminum alloy products in the aeronautic and astronautic fields. The thermal-mechanical coupling model is established between the stir-pin and the workpiece. The heat generation and transfer processes are simulated, and the results of the temperature field distribution for the target position inside the spindle structure are obtained and verified by experiments. Test results show that the spindle system can meet the requirements of friction stir welding for large-scale complex surface structures. Simulation analysis has good consistency with experimental results, as proved by experimental verification. The resulting data can provide reliable reference design and type selection of temperature-sensitive components. Compared with other stir welding heads, this system has high stiffness and overload capacity, which can well meet the high-quality welding requirements of large-scale complex surface structures. Besides that, the thermal analytical method has universal applicability and can provide solutions for temperature field distribution of spindle under different workpiece materials and welding parameters. The friction stir weld spindle system is a novel design for welding large-scale complex surface structures. Its major advantages are the high stiffness and overload capacity. In addition, the heat and thermal simulation method, consisting of two stages, has provided the type-selection reference for the spindle design.

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Thermal energy generation and distribution in friction stir welding of aluminum alloys

Cited by 150 publications

References 34 publications

Numerical modeling for the effect of pin profiles on thermal and material flow characteristics in friction stir welding

Numerical modeling for the effect of pin profiles on thermal and material flow characteristics in friction stir welding

A mesomechanical analysis of the stress–strain localisation in friction stir welds of polycrystalline aluminium alloys

Structure design and thermal analysis of a new type of friction stir weld spindle

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