Numerical simulation based upon friction coefficient model on thermo-mechanical coupling in rotary friction welding corresponding with corona-bond evolution

2019 ◽  
Vol 45 ◽  
pp. 595-602 ◽  
Author(s):  
Feng Jin ◽  
Jinglong Li ◽  
Yajie Du ◽  
Xujing Nan ◽  
Junmiao Shi ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Friction Coefficient ◽  
Friction Welding ◽  
Mechanical Coupling ◽  
Rotary Friction Welding ◽  
Simulation Based

Friction coefficient model and joint formation in rotary friction welding

2019 ◽  
Vol 46 ◽  
pp. 286-297 ◽  
Author(s):  
Feng Jin ◽  
Jinglong Li ◽  
Pu Liu ◽  
Xujing Nan ◽  
Xun Li ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Friction Welding ◽  
Joint Formation ◽  
Rotary Friction Welding

scholarly journals Particle Directional Conveyance under Longitudinal Vibration by considering the Trough Surface Texture: Numerical Simulation Based on the Discrete Element Method

2018 ◽  
Vol 2018 ◽  
pp. 1-13
Author(s):  
Huazhi Chen ◽  
Shengyuan Jiang ◽  
Rongkai Liu ◽  
Weiwei Zhang
Keyword(s):  
Numerical Simulation ◽  
Friction Coefficient ◽  
Discrete Element Method ◽  
Longitudinal Vibration ◽  
Cumulative Effect ◽  
Static Friction ◽  
Discrete Element ◽  
Rolling Friction ◽  
Simulation Based ◽  
Element Method

Particles can move directionally in a trough with finlike asperities under longitudinal vibrations. Here, we present an analysis of the particle conveyance mechanism and the influence of the asperity shape on the particle conveyance capacity by employing a numerical simulation based on the discrete element method (DEM). A dynamic-static matching method is proposed to characterize the three microcontact parameters in the simulation: the restitution coefficient, static friction coefficient, and rolling friction coefficient. The simulation shows that the asymmetric force induced by the finlike asperities and its cumulative effect over time lead to the particle directional conveyance. The conveyance velocity increases with increasing vibration time and is related to the median coordination number. The asperity height and slope inclination angles determine the trough shape and distance between two asperities directly. An undersized or oversized distance reduces the steady conveyance velocity. We find the optimal distance to be between one and two particle diameters.

Direct numerical simulation–based Reynolds-averaged closure for bubble-induced turbulence

2017 ◽  
Vol 2 (3) ◽  
Author(s):  
Tian Ma ◽  
Claudio Santarelli ◽  
Thomas Ziegenhein ◽  
Dirk Lucas ◽  
Jochen Fröhlich
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Simulation Based

Numerical simulation based approach for assessment of blast induced deformation pattern in slot raise excavation

2021 ◽  
Vol 144 ◽  
pp. 104816
Author(s):  
Vivek K. Himanshu ◽  
A.K. Mishra ◽  
M.P. Roy ◽  
Ashish K. Vishwakarma ◽  
P.K. Singh
Keyword(s):  
Numerical Simulation ◽  
Deformation Pattern ◽  
Simulation Based

Numerical Simulation on Thixo-Forging of Magnesium Matrix Composite

2011 ◽  
Vol 189-193 ◽  
pp. 2535-2538 ◽  
Author(s):  
Hong Yan ◽  
Wen Xian Huang
Keyword(s):  
Numerical Simulation ◽  
Matrix Composite ◽  
Metal Flow ◽  
Magnesium Matrix Composite ◽  
Magnesium Matrix ◽  
Simulation Based ◽  
Prior Literature ◽  
Simulation Results ◽  
Computer Numerical Simulation ◽  
Good Agreement

The thixo-forging of magnesium matrix composite was analyzed with computer numerical simulation based on rigid viscoplastic finite element method. The constitutive model of SiCp/AZ61 composite was established in our prior literature. Behavior of metal flow and temperature field were obtained. The differences between traditional forging and thixo-forging processes were analyzed. Results indicated that thixo-forging was better in filling cavity than forging. Simulation results were good agreement with experimental ones.

Influence of Rotary Friction Welding Parameters on Tensile Strength and Length of TMAZ of Dissimilar Welded Joints from 32G2 and 40KhN Steels

2021 ◽  
Vol 410 ◽  
pp. 299-305
Author(s):  
Artem S. Atamashkin ◽  
Elena Y. Priymak ◽  
Elena A. Kuzmina
Keyword(s):  
Tensile Strength ◽  
Base Metal ◽  
Process Parameters ◽  
Welded Joints ◽  
Friction Welding ◽  
Tensile Tests ◽  
Welding Parameters ◽  
Rotary Friction Welding ◽  
Study Results ◽  
Friction Pressure

In this work, pipe billets with a diameter of 73 mm and a wall thickness of 9 mm from steels 32G2 and 40KhN are friction welded with an aim to optimize the process parameters. The friction pressure, the forging pressure and the length of the fusion varied. After the implementation of various welding modes, tensile tests and metallographic studies were carried out. The optimal welding parameters have been established, which make it possible to obtain tensile strength at the level of the 32G2 base metal. The study results of the microstructure and SEM fractographs after the optimal welding mode are presented.

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