Effect of prestressed ultrasonic peen forming parameters on bending curvature and spherical deformation of plate

2019 ◽  
Vol 29 (2) ◽  
pp. 270-278
Author(s):  
Tao ZHANG ◽  
Lei LI ◽  
Shi-hong LU ◽  
Jia-bin ZHANG ◽  
Zhen ZHOU ◽  
...  
Keyword(s):  
Forming Parameters ◽  
Peen Forming

Prediction of peen forming stress and plate deformation with a combined method

2019 ◽  
Vol 233 (14) ◽  
pp. 2492-2504 ◽  
Author(s):  
Xudong Xiao ◽  
Yao Sun ◽  
Xin Tong ◽  
Yan Li ◽  
Guoqiang Gao
Keyword(s):  
Finite Element ◽  
Stress Field ◽  
Finite Element Model ◽  
Element Model ◽  
Internal Stresses ◽  
Single Shot ◽  
Forming Parameters ◽  
Peen Forming ◽  
Computational Resources ◽  
The Finite Element Model

To simulate the deformations of the strip peen formed plate more realistic, and using low computational resources, a strategy combining analytical and finite element methods is proposed in this article. First, the internal stresses in the target induced by single shot impact are calculated with expanding cavity model. Second, the stress field of single shot impact is used to derive the stress field of multiple shot impacts by considering the overlaps of adjacent shot impacts. Third, the calculated stress field is introduced to the finite element model to obtain the resultant shape of the plate. The shot dimple distribution in reality is detected and fitted with normal distribution function. The random distribution of the positions of shot impacts is involved in the simulation to make the simulation more realistic. In the finite element model, the plate is modeled with shell element to reduce the demand of the computational resources. The simulated shapes of the plate under different peen forming parameters are compared with the scanned three-dimensional experimental shapes with the same forming parameters. The comparison shows that the simulated shapes are in good agreement with the experiments.

Prediction of Shot Peen Forming Parameters of Integral Aircraft Wing Panels

2006 ◽  
Vol 532-533 ◽  
pp. 937-940 ◽  
Author(s):  
Xian Jie Zhang ◽  
Jun Biao Wang ◽  
Yong Jun Wang ◽  
Ming Jie Qiao
Keyword(s):  
Tensile Strain ◽  
Back Propagation ◽  
Deformation Energy ◽  
Aircraft Wing ◽  
Airfoil Surface ◽  
Bending Deformation ◽  
Forming Parameters ◽  
Peen Forming ◽  
The Difference ◽  
Stretching Deformation

In this paper, algorithms are presented for predicting peen forming parameters of integral aircraft wing panels with complex airfoil shapes. The peen forming deformation is divided into stretching deformation and bending deformation. The stretching deformation is assumed to result from the tensile strain within the plane panel, and the bending deformation corresponds to the difference of maximum and minimum curvature of the airfoil surface. The distribution of the forming tensile strain within the panel is obtained by optimal mapping of the airfoil surface in the sense that the stretching deformation energy from the plane panel to its spatial shape is minimized. In order to fit the nonlinear relation between the peening parameters and the deforming parameters, a back-propagation (BP) artificial neural network (ANN) is modeled with input parameters of thickness, curvature, tensile strain, etc, to predict the peening parameters of coverage, air pressure and intensity. Experimental peen forming data are given to train the BP ANN. It’s verified that the predicting methods are effective.

Finite element modelling of laser peening and laser peen forming of materials

2004 ◽  
Author(s):  
Patrice Peyre ◽  
Marie-Amélie Petit ◽  
Cyril Bolis ◽  
Eric Bartnicki ◽  
Rémy Fabbro ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Laser Peening ◽  
Element Modelling ◽  
Peen Forming

Effects of exposure time and intensity on the shot peen forming characteristics of Ti/CFRP laminates

2016 ◽  
Vol 91 ◽  
pp. 96-104 ◽  
Author(s):  
Yubing Hu ◽  
Wei Zhang ◽  
Wei Jiang ◽  
Liang Cao ◽  
Yizhou Shen ◽  
...  
Keyword(s):  
Exposure Time ◽  
Cfrp Laminates ◽  
Peen Forming ◽  
Forming Characteristics

B-727 Brake Components Salvaged by Shot Peen Forming

1991 ◽  
Author(s):  
John Eckersley ◽  
David Axline
Keyword(s):  
Peen Forming

scholarly journals Simulation and automation of aluminium panel shot peen forming

2022 ◽  
Author(s):  
Vladislav Sushitskii ◽  
Pierre-Olivier Dubois ◽  
Hong Yan Miao ◽  
Martin levesque ◽  
Frederick Gosselin
Keyword(s):  
Shot Peening ◽  
Pattern Generation ◽  
Experimental Results ◽  
Shape Model ◽  
Peen Forming ◽  
Metal Plates ◽  
Airplane Wing ◽  
Aluminum Plates ◽  
Doubly Curved

We present a methodology for automated forming of metal plates into freeformshapes using shot peening. The methodology is based on a simulation softwarethat computes the peening pattern and simulates the effect of its application.The pattern generation requires preliminary experimental characterizationof the treatment. The treatment is applied by a shot peening robot. The program for the robot is generated automatically according to the peening pattern. We validate the methodology with a series of tests. Namely, we form nine aluminum plates into doubly curved shapes and we also shape model airplane wing skins. The article describes the complete workflow and the experimental results.

scholarly journals Forming parameters optimizations with drawing force and die stress in wire rod drawing using rotating die under Coulomb friction

2018 ◽  
Vol 185 ◽  
pp. 00025
Author(s):  
Ing-Kiat Tiong ◽  
Un-Chin Chai ◽  
Gow-Yi Tzou
Keyword(s):  
Taguchi Method ◽  
Coulomb Friction ◽  
Effective Strain ◽  
Fem Simulation ◽  
Frictional Coefficient ◽  
Simulation Software ◽  
Drawing Force ◽  
Wire Rod ◽  
Forming Parameters ◽  
Die Stress

An optimization research is performed on the related forming parameters of wire rod drawing through a rotating die under Coulomb friction. The optimization research is conducted through finite element method (FEM) simulation combined with Taguchi method. There are two drawing characteristic optimizations have been carried out. They are the optimizations with drawing force and die stress. The forming parameters considered in this study are half die angle, frictional coefficient, die fillet, and rotating angular velocity of the rotating die. The same procedure is carried out in both optimizations. The geometrical models of the wire rod, top die and rotating die are constructed firstly in SolidWorks and imported into the FEM simulation software named DEFORM 3D. With the aid of Taguchi method, the simulation experiments are carried out. The results such as drawing force, die stress, and the corresponding signal-to-noise (S/N) ratio are obtained and compared. The influence rank of the forming parameters and the optimal combination of parameters are obtained through the response table for both optimizations. The results such as effective stress, effective strain, velocity field, drawing force, and die stress are studied. The results show that the minimizations of drawing force and die stress are successfully achieved.

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