Finite Element Modeling of the Technology of Multiple Laser Shock Processing of Materials Using the Eigenstrain Method

2018 ◽  
Vol 47 (5) ◽  
pp. 473-478 ◽  
Author(s):  
G. Zh. Sakhvadze
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Element Modeling ◽  
Shock Processing

Influence of Laser Shock Processing on the Weld Line and Finite Element Simulation

2011 ◽  
Vol 464 ◽  
pp. 627-631
Author(s):  
Jie Zhang ◽  
Ai Hua Sun ◽  
Le Zhu ◽  
Xiang Gu
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Welding Residual Stress ◽  
Laser Shock ◽  
Analysis Software ◽  
Laser Shock Processing ◽  
Element Analysis ◽  
Welding Line ◽  
Simulation Results ◽  
Shock Processing

Welding residual stress is one of the main factors that affect the strength and life of components. In order to explore the effect on residual stress of welding line by laser shock processing, finite element analysis software ANSYS is used to simulate the welding process, to calculate the distribution of welding residual stress field. On this basis, then AYSYS/LS-DYNA is used to simulate the laser shock processing on welding line. Simulation results show that residual stress distributions of weld region, heat-affected region and matrix by laser shock processing are clearly improved, and the tensile stress of weld region effectively reduce or eliminate. The simulation results and experimental results are generally consistent, it offer reasons for parameter optimization of welding and laser shock processing by finite element analysis software.

Effects of Sheet Thickness on Residual Stress Distribution by Laser Shock Processing of 7050-T7451 Aluminum Alloy

2011 ◽  
Vol 189-193 ◽  
pp. 3778-3781
Author(s):  
Yin Fang Jiang ◽  
Lei Fang ◽  
Zhi Fei Li ◽  
Zhen Zhou Tang
Keyword(s):  
Finite Element ◽  
Aluminum Alloy ◽  
Stress Distribution ◽  
Residual Stresses ◽  
Sheet Thickness ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Element Analysis ◽  
Finite Element Software ◽  
Shock Processing

Laser shock processing is a technique similar to shot peening that imparts compressive residual stresses in materials for improved fatigue resistance. Finite element analysis techniques have been applied to predict the residual stresses from Laser shock processing. The purpose of this paper is to investigate of the different sheet thickness interactions on the stress distribution during the laser shock processing of 7050-T7451 aluminum alloy by using the finite element software. The results indicate that the sheet thickness has little effects on the compression stress in the depth of sheet, but great impacts on the reserve side.

Numerical Simulation of Fatigue Life on MSC.Fatigue and ABAQUS

2010 ◽  
Vol 43 ◽  
pp. 624-627
Author(s):  
Jie Zhang ◽  
Xiang Gu ◽  
Hai Wei Ye ◽  
Kang Wen Li
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Finite Element ◽  
Fatigue Life ◽  
Fatigue Test ◽  
Surface Hardening ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Shock Processing ◽  
Important Significance

Laser Shock Processing (LSP) is a kind of new surface hardening technology, which can increase fatigue life obviously. Due to the LSP, the residual stress is generated and dislocations increase obviously in the surface of specimen, so the fatigue life of specimen processed by LSP increases. Thanks to the finite element programs, it is able to simulate the fatigue life. The simulation of fatigue life has important significance, which not only can reduce the costs of fatigue test and research, but also further study the effect of LSP on fatigue life. The results of fatigue test coincide with the results of simulation.

Research on Propagation Characteristics of Stress Waves in Laser Shock Processing for DD6 Single Crystal Alloy Materials

2012 ◽  
Vol 164 ◽  
pp. 3-6 ◽  
Author(s):  
Ying Wu Fang ◽  
Ying Hong Li ◽  
Hui Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Single Crystal ◽  
Theoretical Basis ◽  
Stress Waves ◽  
Laser Shock ◽  
Propagation Characteristics ◽  
Laser Shock Processing ◽  
Single Crystal Alloy ◽  
Shock Processing

The finite element ANSYS/LS-DYNA was applied to simulate the propagation characteristics of stress waves in laser shock processing (LSP) for DD6 single crystal alloy materials. The constitutive model of dynamic response and computational modeling of LSP was built in this paper. Results of numerical simulation indicates that the change of stress waves was mainly appeared to the first wave, and the time with fluctuation was expanded slowly with the spread depth of stress wave was increased. The results can be used as theoretical basis for optimizing the process parameters in laser shock processing.

Exact First Order Finite Element Modeling for Eddy Current NDE

1991 ◽  
Vol 3 (1) ◽  
pp. 235-253 ◽  
Author(s):  
L. D. Philipp ◽  
Q. H. Nguyen ◽  
D. D. Derkacht ◽  
D. J. Lynch ◽  
A. Mahmood
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Eddy Current ◽  
Element Modeling ◽  
First Order ◽  
Eddy Current Nde
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