Numerical Simulation Analysis of Shot Peening Residual Stress on Aluminum Alloy Surface Based on Finite Element Method

2020 ◽  
Author(s):  
Xiaodong Li ◽  
Chuanhai Jiang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Aluminum Alloy ◽  
Shot Peening ◽  
Simulation Analysis ◽  
Alloy Surface ◽  
Aluminum Alloy Surface ◽  
Element Method

Numerical Simulation of Riveting Process

2010 ◽  
Vol 34-35 ◽  
pp. 641-645
Author(s):  
Hong Shuang Zhang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Process Parameters ◽  
Static Method ◽  
Riveting Process ◽  
Relationship Of ◽  
The Relationship ◽  
Element Method

In order to fully understanding the distribution of residual stress after riveting and the relationship between residual stress and riveting process parameters during riveting, Finite Element Method was used to establish a riveting model. Quasi-static method to solve the convergence difficulties was adopted in riveting process. The riveting process was divided into six stages according to the stress versus time curves. The relationship of residual stress with rivet length and rivet hole clearance were established. The results show numerical simulation is effective for riveting process and can make a construction for the practical riveting.

Numerical Simulation Analysis on Repairing Hole of UAV Wing

2013 ◽  
Vol 690-693 ◽  
pp. 2891-2895
Author(s):  
Guo Dong Jin ◽  
Li Bin Lu ◽  
Liang Xian Gu ◽  
Juan Liang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Service Life ◽  
Simulation Analysis ◽  
High Stress ◽  
Reference Value ◽  
Safety Standards ◽  
Aerial Vehicle ◽  
Element Method

Parachute recovery of UAV is often caused of holes and other injuries on wings, that are required repair and maintenance. The surface of the patch will form the high stress area, that affects UAV using life and safety .But repair method is good or bad directly affects size of the high stress area. Based on finite element method, the broken hole repairing method was formulated and validated by ANSYS. The method could minimize the high stress area as far as possible, and economically repair broken hole of wing in certain precision and safety standards condition. It has a certain reference value for UAV repair and management, and has reference significance for extending the service life of the UAV. Key words: Finite element method; Unmanned Aerial Vehicle (UAV); Simulation; Hole of wings

Study of Forging Process of Yttrium-Modified A356 Aluminum Alloy and Numerical Simulation by Thermo-Viscoplastic Finite Element Method

2016 ◽  
Vol 701 ◽  
pp. 177-181 ◽  
Author(s):  
Heng Keong Kam ◽  
Chan Chin Wang ◽  
Ying Pio Lim ◽  
Wen Chiet Cheong
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Aluminum Alloy ◽  
Solid State ◽  
A356 Aluminum Alloy ◽  
Backward Extrusion ◽  
A356 Aluminum ◽  
Semi Solid ◽  
Element Method

In this study, A356 aluminum alloy was heated up to semi-solid state and used as a billet for forward and backward extrusion. The workpiece will undergo solidification at the contact between billet and the tools when the material flowing through the die cavity during the semi-solid extrusion. The plasticity of A356 with 0.3wt% Y at semi-solid state was investigated by performing compression test. A numerical simulation code based on thermo-viscoplastic finite element method was developed to simulate the material flow and study the yttrium-modified A356 aluminum alloy under forward and backward extrusion. A minimum average punch strain rate is proposed for semi-solid extrusion.

Numerical Simulation of Weld Metal by Ultra-Narrow Gap Arc Welding

2011 ◽  
Vol 704-705 ◽  
pp. 728-732
Author(s):  
Li Zhao ◽  
Ke Jie Dai ◽  
Fu Ju Zhang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Thick Plate ◽  
Welding Residual Stress ◽  
Narrow Gap ◽  
Welding Temperature ◽  
Welding Joint ◽  
Element Method

The ultra narrow gap welding process is suitable to the thick plate, ultra-thick plate welding with the characteristic of highly effective, high quality, low cost, low energy consumption and so on, and is easy to realize the mechanization and the automation. In this paper, the numerical simulation and technical experiment are used to study the form, grow and distribution regulation of the welding temperature field, stress field in welding joint with UNG MAW. Using the calculation to the thickness of 32mm, an example to simulate the magnitude and distribution of the residual stress in welding joint is given. Research shows that it is an effective analysis method to heat process and mechanic behavior in the welding by using finite element method numerical simulation and few experiments. Keywords: UNG MAW, Welding residual stress, Finite element method, Numerical simulation

Analysis of the Impact of a Shot at Low Velocity Using the Finite Element Method. Application to the Ultrasonic Shot-Peening Process

2006 ◽  
Vol 524-525 ◽  
pp. 337-342 ◽  
Author(s):  
Florent Cochennec ◽  
Emmanuelle Rouhaud ◽  
Delphine Retraint ◽  
Sébastien Rouquette ◽  
Arjen Roos
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Stress Field ◽  
Shot Peening ◽  
The Finite Element Method ◽  
Residual Stress Field ◽  
Low Velocity ◽  
Ultrasonic Shot Peening ◽  
Element Method

Shot-peening is a surface treatment widely used in the industry to improve fatigue life of mechanical components by introducing compressive residual stresses. Ultrasonic shot-peening is a recent development of this process. While the classical shot-peening process uses pneumatic energy to project the shots, ultrasonic peening uses high-power ultrasounds. This energy source allows the use of larger shots projected at lower velocity as compared to classical shot-peening. This work aims at studying the mechanical response (restitution coefficient, residual stress field) of a surface impacted by a shot at low velocity using the finite element method and experimental analysis. This paper presents the simulation of a single elastic steel shot normally impacting an Aluminum alloy plate considered to exhibit a linear-elastic behavior and non-linear isotropic work hardening characteristics. The numerical simulations are carried out for different impact velocities in order to take into account the heterogeneous shot velocity field observed in an ultrasonic shot-peening chamber. We compare the simulated rebound energy and the indentation profiles obtained for different impact velocities to experimental results. The simulated residual stress field topology shows a strong dependence on the shot velocity. While numerical results obtained at high impact energy agree well with literature results, the residual stress distribution simulated for low impact energies shows a tensile layer below the impacted area. The restitution coefficients and the indentation profiles compare well with the experiments.

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