Numerical Simulation on 3D Residual Stress Field of Both-Side Laser Shot Peened Specimen with Center-Hole

A numerical analytical model for both-side laser shot peening (LSP) of specimen with center-hole was established, the influence of the center-hole on peening effect was investigated, and the 3D residual stress distributions of ZK60 specimen after one-side and both-side LSP were analyzed. The results showed that compressive residual stresses were obtained at the both sides of specimen after both-side LSP, with a stress value of -179.41MPa on the bottom surface, much larger than that of one-side LSP. The typical experiment of LSP for ZK60 specimen was carried out and the experimental data were well correlated with the simulated results.

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Numerical Simulation of Residual Stress Field Induced in Round Rod Part Affected by Laser Parameters

Chinese Journal of Lasers ◽

10.3788/cjl201643.0802007 ◽

2016 ◽

Vol 43 (8) ◽

pp. 0802007

Author(s):

汪静雪 Wang Jingxue ◽

章艳 Zhang Yan ◽

张兴权 Zhang Xingquan ◽

戚晓利 Qi Xiaoli ◽

裴善报 Pei Shanbao ◽

...

Keyword(s):

Numerical Simulation ◽

Residual Stress ◽

Stress Field ◽

Residual Stress Field ◽

Laser Parameters

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ENPOWER: Investigations by Neutron Diffraction and Finite Element Analyses on Residual Stress Formation in Repair Welds Applied to Ferritic Steel Plates

Volume 6: Materials and Fabrication ◽

10.1115/pvp2005-71786 ◽

2005 ◽

Cited By ~ 1

Author(s):

Carsten Ohms ◽

Robert C. Wimpory ◽

Dimitar Neov ◽

Didier Lawrjaniec ◽

Anastasius G. Youtsos

Keyword(s):

Experimental Data ◽

Residual Stress ◽

Numerical Analysis ◽

Neutron Diffraction ◽

Stress Field ◽

Ferritic Steel ◽

Maximum Stress ◽

Steel Plates ◽

Residual Stress Field ◽

Welding Procedure

The European collaborative research project ENPOWER (Management of Nuclear Plant Operation by Optimizing Weld Repairs) has as one of its main objectives the development of guidelines for the application of repair welds to safety critical components in nuclear power plants. In this context letter box repair welds applied to thin ferritic steel plates to simulate repair of postulated shallow cracks have been manufactured for the purpose of experimental and numerical analysis of welding residual stresses. Two specimens have been procured, one of them prepared in accordance with a standard welding procedure, while in the second case a different procedure was followed in order to obtain extended martensite formation in the heat affected zone. Residual stresses have been determined in both specimens by neutron diffraction at the High Flux Reactor of the Joint Research Centre in Petten, The Netherlands. In parallel Institut de Soudure in France has performed a full 3-d analysis of the residual stress field for the standard welding case taking into account the materials and phase transformations. The experimental data obtained for both specimens clearly suggest that the non-conventional welding procedure rendered higher maximum stress values. In the case of the standard welding procedure numerical and experimental data show a reasonable qualitative agreement. The maximum stress value was in both cases found in the same region of the material — in the base metal just underneath the weld pool — and in both cases found to be of similar magnitude (∼800 MPa found in neutron diffraction and ∼700 MPa found in numerical analysis). In this paper the experimental and numerical approaches are outlined and the obtained results are presented. In addition an outlook is given to future work to be performed on this part of the ENPOWER project. A main issue pending is the application of an optimized advanced post weld heat treatment in one of the two cases and the subsequent numerical and experimental determination of its impact on the residual stress field. At the same time further evaluation of the materials transformations due to welding is pursued.

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The Effect of Residual Stresses on the Fracture Resistance of Ductile Steels

Computational Weld Mechanics, Constraint, and Weld Fracture ◽

10.1115/pvp2002-1121 ◽

2002 ◽

Author(s):

Noel P. O’Dowd ◽

Yuebao Lei

Keyword(s):

Residual Stress ◽

Stress Field ◽

Residual Stresses ◽

Crack Opening ◽

Stress Distributions ◽

Residual Stress Field ◽

Element Analysis ◽

Fatigue And Fracture ◽

Negative Effect ◽

Fracture Performance

Tensile residual stresses, such as those generated by welding, act as crack opening stresses and can have a negative effect on the fatigue and fracture performance of a component. In this work the effect of representative residual stress distributions on the fracture behaviour of a ferritic steel has been examined using finite element analysis. A Gurson-type void growth model is used to model the effect of ductile tearing ahead of a crack. For the cases examined it is seen that a tensile residual stress field may lead to a reduction in the toughness of the material (as represented by the J-resistance curve). The observed difference in toughness can be linked to the different constraint levels in the specimens due to the introduction of the residual stress field and can be rationalised through the use of a two parameter, J–Q approach.

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Numerical Simulation of Residual Stress Field Induced by Water-Jet Cavitation Peening

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.345.312 ◽

2013 ◽

Vol 345 ◽

pp. 312-315 ◽

Cited By ~ 2

Author(s):

Bing Han ◽

Yan Hua Wang ◽

Chang Liang Xu

Keyword(s):

Numerical Simulation ◽

Residual Stress ◽

Stress Field ◽

New Technology ◽

Diffraction Method ◽

Spring Steel ◽

Water Jet ◽

Material Surface ◽

Residual Stress Field ◽

Element Analysis

Water-jet cavitation peening is a new technology for surface modification of metallic materials. Compress residual stress layer is induced by impact wave pressure in the submerged cavitating jets processing. Based on ANSYS/LS-DYNA finite element analysis software, residual stress field in the SAE1070 spring steel material surface induced by cavitate-jet water peening process is simulated, the magnitude and variation rules of the residual stress along the layer depth under different conditions is obtained. In order to verify the correctness of the numerical simulation, the size and distribution of residual stress by the X-ray diffraction method. The results show that the numerical simulation and experimental results are well consistent.

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Numerical Simulation of Residual Stresses Induced from Shot Peening with Finite Element Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.433-435.1898 ◽

2013 ◽

Vol 433-435 ◽

pp. 1898-1901

Author(s):

Li Juan Cao ◽

Shou Ju Li ◽

Zi Chang Shangguan

Keyword(s):

Numerical Simulation ◽

Finite Element Method ◽

Residual Stress ◽

Surface Layer ◽

Residual Stresses ◽

Shot Peening ◽

Target Material ◽

Residual Stress Field ◽

State Of Stress ◽

Compressive Residual Stresses

Shot peening is a manufacturing process intended to give components the final shape and to introduce a compressive residual state of stress inside the material in order to increase fatigue life. The modeling and simulation of the residual stress field resulting from the shot peening process are proposed. The behaviour of the peened target material is supposed to be elastic plastic with bilinear characteristics. The results demonstrated the surface layer affected by compressive residual stresses is very thin and the peak is located on the surface.

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Abrasive Waterjet Peening With Elastic Prestress: Subsurface Residual Stress Distribution

Volume 3: Design and Manufacturing ◽

10.1115/imece2007-43473 ◽

2007 ◽

Cited By ~ 1

Author(s):

Balaji Sadasivam ◽

Alpay Hizal ◽

Dwayne Arola

Keyword(s):

Residual Stress ◽

Stress Distribution ◽

Stress Field ◽

Yield Strength ◽

Residual Stresses ◽

Residual Stress Distribution ◽

Abrasive Waterjet ◽

Residual Stress Field ◽

Surface Residual Stress ◽

Compressive Residual Stresses

Recent advances in abrasive waterjet (AWJ) technology have resulted in new processes for surface treatment that are capable of introducing compressive residual stresses with simultaneous changes in the surface texture. While the surface residual stress resulting from AWJ peening has been examined, the subsurface residual stress field resulting from this process has not been evaluated. In the present investigation, the subsurface residual stress distribution resulting from AWJ peening of Ti6Al4V and ASTM A228 steel were studied. Treatments were conducted with the targets subjected to an elastic prestress ranging from 0 to 75% of the substrate yield strength. The surface residual stress ranged from 680 to 1487 MPa for Ti6Al4V and 720 to 1554 MPa for ASTM A228 steel; the depth ranged from 265 to 370 μm for Ti6Al4V and 550 to 680 μm for ASTM A228 steel. Results showed that elastic prestress may be used to increase the surface residual stress in AWJ peened components by up to 100%.

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Assessment of the Crack Compliance Method and the Introduction of Residual Stresses by Shot Peening Using the Finite Element Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.15.109 ◽

2009 ◽

Vol 15 ◽

pp. 109-114 ◽

Cited By ~ 2

Author(s):

G. Urriolagoitia-Sosa ◽

E. Zaldivar-González ◽

J.M. Sandoval Pineda ◽

J. García-Lira

Keyword(s):

Numerical Simulation ◽

Residual Stress ◽

Stress Field ◽

Residual Stresses ◽

Shot Peening ◽

Working Life ◽

The Finite Element Method ◽

Residual Stress Field ◽

Main Effect

The interest on the application of the shot peening process to arrest and/or delay crack growth is rising. The main effect of the shot peening technique is to introduce a residual stress field that increases the working life of mechanical components. In this paper, it is presented the numerical simulation (FEM) of the shot peening process and the effect of introducing a residual stress field. Besides, the consequence of changing the sizes of the impacting ball is analyzed. This work also used the Crack Compliance Method (CCM) for the determination of residual stresses in beams subjected to a numerical simulation of a shot peening process. The numerical results obtained provide a quantitative demonstration of the effect of shot peening on the introduction of residual stresses by using different sizes of impacting balls and assess the efficiency of the CCM.

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