scholarly journals Simulation of shot peening: From process parameters to residual stress fields in a structure

2016 ◽  
Vol 344 (4-5) ◽  
pp. 355-374 ◽  
Author(s):  
Donato Gallitelli ◽  
Vincent Boyer ◽  
Maxime Gelineau ◽  
Yann Colaitis ◽  
Emmanuelle Rouhaud ◽  
...  
Keyword(s):  
Residual Stress ◽  
Process Parameters ◽  
Shot Peening ◽  
Stress Fields

3D Model of Shot Dynamics for Ultrasonic Shot Peening

2013 ◽  
Vol 768-769 ◽  
pp. 503-509 ◽  
Author(s):  
Jawad Badreddine ◽  
Emmanuelle Rouhaud ◽  
Matthieu Micoulaut ◽  
Sebastien Remy ◽  
Vincent Desfontaine ◽  
...  
Keyword(s):  
Residual Stress ◽  
Process Parameters ◽  
Spatial Data ◽  
Shot Peening ◽  
3D Model ◽  
Prediction Models ◽  
Dissipated Energy ◽  
Displacement Fields ◽  
Ultrasonic Shot Peening ◽  
Stress Prediction

This paper presents a 3D model that simulates an ultrasonic shot peening (USP) operation, using realistic process parameters and peening setups (part and chamber geometries). By simulating the shot dynamics (shot trajectories and impacts), statistical and spatial data are obtained for the peened component, i.e. surface coverage and coverage rate, impact speeds and angles, dissipated energy... This data can then be used for i) optimizing the design of peening chambers and process parameters and ii) predicting the residual stress and displacement fields induced by USP in the peened component. In fact, data from the 3D model can be used as initial data in existing residual stress prediction models. A chaining methodology was developed for this purpose and allows linking the choice of process parameters and USP setup to the induced residual stress displacement fields.

An analysis of residual stress fields caused by shot peening

2002 ◽  
Vol 33 (6) ◽  
pp. 1775-1778 ◽  
Author(s):  
Yu-Kui Gao ◽  
Mei Yao ◽  
Jin-Kui Li
Keyword(s):  
Residual Stress ◽  
Shot Peening ◽  
Stress Fields

Approach by Simulation of Residual Stress Generated by Shot-Peening and Their Stability during Fatigue Cycling

2011 ◽  
Vol 681 ◽  
pp. 303-308
Author(s):  
H. Michaud ◽  
Jean Michel Sprauel ◽  
Chedly Braham
Keyword(s):  
Residual Stress ◽  
Process Parameters ◽  
Shot Peening ◽  
Low Cycle Fatigue ◽  
Fatigue Behaviour ◽  
X Ray Diffraction ◽  
Alloy Steels ◽  
Spring Leaf ◽  
Usual Process ◽  
The Impact

ASCOMETAL produces alloy steels used for spring (leaf or coil), where the weak fatigue points are on the surface which is reinforced by shot-peening. So, the fatigue optimization with the steel grade needs a perfect knowledge of the material answer after shot-peening. For that reason, an analytical model has been developed where low cycle fatigue behaviour and all the usual process parameters are integrated (especially the impact position, and the covering-rate). Moreover, through a Monte-Carlos approach, the model permits to analyse the effect of scattering elements like impact speeds, ball sizes, or material fatigue behaviour. With this model several key process parameters have been analysed and validated with residual stress profiles evaluated by X-ray diffraction. So, for spring leaf, the effect of an applied load during shot-peening or shakedown during bending fatigue is described.

scholarly journals Influence of process parameters on the residual stress state and properties in disc springs made by incremental sheet forming (ISF)

2021 ◽  
Author(s):  
Muhammad Junaid Afzal ◽  
Ramin Hajavifard ◽  
Johannes Buhl ◽  
Frank Walther ◽  
Markus Bambach
Keyword(s):  
Residual Stress ◽  
Stress State ◽  
Residual Stresses ◽  
Process Parameters ◽  
Shot Peening ◽  
Sheet Forming ◽  
Incremental Sheet Forming ◽  
Installation Space ◽  
Residual Stress State ◽  
Compressive Residual Stresses

AbstractDisc springs are machine elements that are used when high forces need to be supplied and in limited installation space. They need to fulfil high demands on the stability of the spring characteristics, reliability and lifetime. In corrosive environments, metastable austenitic stainless steels (MASS) disc springs are often used. Tensile stresses that occur during service limit the lifetime of disc springs. Usually, their durability is enhanced by generating favorable compressive residual stresses using shot peening operations. Such operations lead to extra efforts and additional production costs. In this study, the adaptive and targeted generation of residual stresses via incremental sheet forming (ISF) is investigated as alternative to shot peening focusing on EN 1.4310 and EN 1.4401 stainless steel. Previous work has shown that ISF is capable of controlling the radial and tangential stresses in the springs. However, no analysis of the influence of the residual stress state in the rolled sheet strips and the ISF process parameters was performed. The goal of the current work is to analyze the evolution of residual stress during rolling and subsequent incremental forming of disc springs. In order to examine the role of dissipation and temperature increases in the rolling process, sheet blanks rolled at room and elevated temperature are analyzed. The characteristics of the compressive residual stresses induced by ISF are studied for different process parameters. X‑ray diffraction is used to investigate the buildup of these stresses. Using ISF, the generation of compressive residual stresses can be integrated into the forming process of disc springs, and further post-treatment may be skipped. The results show that the residual stress state in the rolled material is crucial, which requires tight control of the rolling temperature. Another result is that ISF is able to yield high compressive residual stresses and improved spring characteristics when small tool diameters and step-down values are used.

Study of Impact Velocity on Residual Stress and Surface Hardness of SKD11 in Shot Peening Process

2020 ◽  
Vol 304 ◽  
pp. 127-134
Author(s):  
Pudsadee Chupong ◽  
Karuna Tuchinda
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Impact Velocity ◽  
Process Parameters ◽  
Material Properties ◽  
Shot Peening ◽  
Compressive Residual Stress ◽  
Surface Hardness ◽  
Impact Angle ◽  
Residual Stress Distribution

Shot peening process could create compressive residual stress and increase surface hardness and hence also used to improve material surface properties in case thermal effect is to be avoided. The shot peening process parameters such as pressure which result in different shot impact velocity could affect the compressive residual stress distribution which results in different post-process material properties. The ability to understand and predict the effect of process parameters on stress distribution could be very useful to control and obtain material properties as required. In this work, a shot peening process commercially available locally was investigated. The residual stress distribution after shot peening of SKD11 was studied using the finite element (FE) technique. A single shot impact was simulated. A maximum velocity with a miximum impact angle was assumed. The computational predictions showed higher compressive residual stress developed with increasing shot velocity as expected due to higher impact energy. However, experimental results suggested that the process arrangement and machine control highly affect the properties of the material after process. The compressive residual stress and surface hardness obtained experimentally was almost unchanged with an increase in pressure from 0.35MPa to 0.6MPa. It was found that, due to machine arrangement, an increase in impact velocity at higher pressure was relatively small and did not observed in all effected area due to fixed arrangement of nozzle and samples. Hence, research results suggested that a detail computational methodology including the effect of unevent impact velocity and impact angle should be employed to increase the predictive ability of the FE model. The current work could be extended to include such effects with no major difficulty to develop useful information for the design of shot peening process for any specific machine and arrangement.

scholarly journals Effect of Shot Peening on Redistribution of Residual Stress Field in Friction Stir Welding of 2219 Aluminum Alloy

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3169 ◽  
Author(s):  
Lin Nie ◽  
Yunxin Wu ◽  
Hai Gong ◽  
Dan Chen ◽  
Xudong Guo
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Stress Field ◽  
Shot Peening ◽  
Welding Residual Stress ◽  
Stress Fields ◽  
Residual Stress Field ◽  
Friction Stir ◽  
2219 Aluminum Alloy

Welding is one of the essential stages in the manufacturing process of mechanical structures. Friction stir welding structure of aluminum alloy has been used as a primary supporting member in aerospace equipment. However, friction stir welding inevitably generates residual stress that promotes the initiation and propagation of cracks, threatening the performance of the welded structure. Shot peening can effectively change the distribution of residual stress and improve the fatigue properties of materials. In this paper, friction stir welding and shot peening are performed on 2219 aluminum alloy plates. The residual stress fields induced by friction stir welding and shot peening are measured by using the X-ray diffraction method and incremental center hole drilling method, and the distribution characteristics of residual stress fields are analyzed. The effect of the pellet diameters and pellet materials used in shot peening on the redistribution of welding residual stress field are investigated. The pellet diameter used in the experiment is in the range of 0.6–1.2 mm, and the pellet material includes glass, steel, and corundum. This study provides guidance for the application of shot peening in friction stir welding structure of 2219 aluminum alloy.

Influence of Shot Peening Parameters on Process Effectiveness

2012 ◽  
Author(s):  
Abdalla Elbella ◽  
Fawaz Fadul ◽  
Sri Harsha Uddanda ◽  
Nagender Reddy Kasarla
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Process Parameters ◽  
Shot Peening ◽  
Incidence Angle ◽  
Target Material ◽  
Stress Profile ◽  
Surface Strength ◽  
Residual Stress Profile ◽  
The Impact

The shot peening process is known for the surface treatment of metallic components. The process is used to enhance surface strength and extend component fatigue life by introducing a compressive residual stress pattern in the surface layers of the component. Numerical simulation of the shot peening process is a tool that has been recently used to help control the process. The simulation helps in investigating the effects of the process parameters with an aim of attaining the optimum residual stress profile and maximum process gain. In this paper, elasto-plastic finite element simulation is used to perform this investigative analysis. The process parameters that are varied in this analysis are: the shot diameter, shot velocity, incidence angle and target material. The analysis is to be carried for three different materials, namely, steel, aluminum and titanium. An Explicit commercial finite element code (ABAQUS) is used to simulate the impact phenomenon. The results of the analysis are sets of varying plots of residual stress through the depth of the targets.

The Numerical Optimization of Laser Shot Peening Parameters Based on Response Surface Analysis

2011 ◽  
Vol 464 ◽  
pp. 443-447
Author(s):  
Su Qing Jiang ◽  
Jian Hua Wu ◽  
Hong Guang Xu ◽  
Jian Zhong Zhou
Keyword(s):  
Residual Stress ◽  
Stress Field ◽  
Response Surface ◽  
Surface Analysis ◽  
Process Parameters ◽  
Shot Peening ◽  
Compressive Residual Stress ◽  
Response Surface Analysis ◽  
Residual Stress Field ◽  
Laser Process

Residual stress field induced by laser shot peening (LSP) was simulated using Box-Behnken experimental design. Compressive residual stress field intensity (S) was introduced to estimate the effect of compressive residual stress field on fatigue performance. The effect of laser process parameters (such as laser shock wave peak pressure, spot diameter and peening number) on S was analyzed by response surface analysis (RSA), quadratic regression predicting model for S was established, and the rationality of that was verified. Finally, the optimal combination of laser process parameters oriented to anti-fatigue manufacture was optimized. The results indicated statistical analysis results agreed well with those of simulation, RSA for parameter optimization of LSP is feasible.

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