Research on Ball Spinning Forming of Superalloy Inconel 718 Thin-Walled Tube

2011 ◽  
Vol 189-193 ◽  
pp. 2742-2745 ◽  
Author(s):  
Yong Hua Li ◽  
Tao Fan ◽  
Ning Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Inconel 718 ◽  
Principal Axis ◽  
The Finite Element Method ◽  
Technical Parameters ◽  
Thin Walled Tube ◽  
Spinning Process ◽  
Ball Spinning ◽  
Thin Walled

Ball spinning is an effective process to manufacture thin-walled tubular product of superalloy Inconel 718, which has been used widely in aerospace and other fields. In this literature, ball spinning process of superalloy thin-walled tube was investigated using software DEFORM. The build-up phenomenon and its influencing factors like principal axis speed, axial feed rate and wall thichness reduction were investigated using the finite element method (FEM). The experiment of ball spinning process was perfomed based on the proper technical parameters obtained by simulation. The simulated results agreed well with the experimental results.

Optimum Dimensions of Thin Walled Tube on the Mechanical Performance of Super Stud Bolt

2008 ◽  
Vol 385-387 ◽  
pp. 249-252
Author(s):  
Yang Xiao ◽  
Masahiro Kuhara ◽  
Naoaki Noda ◽  
Kinjiro Saito ◽  
Masato Nagawa ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Phase Difference ◽  
Mechanical Performance ◽  
Axial Direction ◽  
The Finite Element Method ◽  
Thin Walled Tube ◽  
Thin Walled ◽  
External Loads ◽  
Phase Differences

The bolts and nuts are widely used in various fields as important joining elements with long history. However, loosening induced by the vibration and external loads is still a big problem. And the loosening sometimes causes very serious accident without notice. This paper deals with a special stud bolt named “Super Stud Bolt (SSB)” which can prevent loosening effectively. There is a thin walled tube between the upper and lower threads, which can be deformed along the axial direction so that the phase difference is produced and SSB is developed. This phase difference induces the contrary force on the surfaces of the upper and lower threads, which brings out the anti-loosening performance. In this study, the processing and fastening-loosening courses are simulated with the finite element method. And the anti-loosening performance is analyzed and realized. In addition, the anti-loosening performances under various phase differences are compared and finally best dimensions for SSB are examined.

Improving the honing accuracy of the holes of stepped thin-walled cylinders

2021 ◽  
pp. 49-54
Author(s):  
V.A. Ogorodov
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Cutting Forces ◽  
Software Package ◽  
The Finite Element Method ◽  
Radial Forces ◽  
Thin Walled ◽  
Hole Machining ◽  
Deform 3D ◽  
Walled Cylinder

Different ways of fixing of stepped thin-walled cylinders during honing are analyzed. The conditions for increasing the accuracy of hole machining are determined on the basis of unevenness of cylinder deformations from clamping forces and radial forces simulating cutting forces. The studies used the finite element method and the DEFORM-3D V6.1 software package. Keywords: honing, stepped thin-walled cylinder, hole, accuracy, fixing method, deformation, unevenness, DEFORM-3D V6.1 software package. [email protected]

Research on Machining Accuracy in Milling Ti6Al4V Thin-Walled Component with Paraffin Reinforcement

2012 ◽  
Vol 268-270 ◽  
pp. 504-509
Author(s):  
Biao Gao ◽  
Jie Sun ◽  
Jian Feng Li
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Machining Accuracy ◽  
The Finite Element Method ◽  
Technical Problems ◽  
Low Stiffness ◽  
Thin Walled ◽  
Element Method

According to the technical problems such as low stiffness vibration and dimension error in milling Ti6Al4V thin-walled component, the manufacturing with paraffin reinforcement is studied. Firstly, paraffin formula for milling thin-walled component is researched. Secondly, applying the finite element method (FEM) to predict the deformation of machining with paraffin reinforcement and the corresponding milling experiments is done to check the the validity of the model. Finally, the influences of machining accuracy about different paraffin formulas for the same component are obtained. This study supplies support for the research of paraffin formula which are based on reducing the distortion of workpiece.

Finite Element Analyses of Circumferential Cracks in Thin-Walled Cylinders: T-Stress Solutions

2006 ◽  
Author(s):  
Timothy Lewis ◽  
Xin Wang ◽  
Robert Bell
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Fracture Mechanics ◽  
Fracture Analysis ◽  
Finite Element Analyses ◽  
The Finite Element Method ◽  
T Stress ◽  
Bending Loads ◽  
Pipe Radius ◽  
Thin Walled

The elastic T-stress is a parameter used to define the level of constraint at a crack tip. It is important to provide T-stress solutions for practical geometries in order to apply the constraint-based fracture mechanics methodology. In the present paper, T-stress solutions are provided for circumferential through-wall cracks in thin-walled cylinders. Cylinders with a circumferential through-wall crack were analyzed using the finite element method. Three cylinder geometries were considered; defined by the pipe radius (R) to wall thickness (t) ratios: R/t = 5, 10, and 20. The T-stress was obtained at eight crack lengths (θ/π = 0.0625, 0.1250, 0.1875, 0.2500, 0.3125, 0.3750, 0.4375, and 0.5000) for remote tension and remote bending loads. These results are suitable for constraint-based fracture analysis for cylinders with circumferential cracks.

scholarly journals THIN-WALLED EPOXY-GLASS FIBRE BEAMS SUBJECTED TO PURE BENDING

2013 ◽  
Vol 7 (2) ◽  
pp. 83-88
Author(s):  
Tomasz Kubiak ◽  
Zbigniew Kołakowski
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Method ◽  
Order Approximation ◽  
The Finite Element Method ◽  
Glass Composite ◽  
Pure Bending ◽  
Walled Channel ◽  
Thin Walled ◽  
Element Method

Abstract Buckling and postbuckling behaviour of thin-walled channel section beam made of epoxy-glass composite have been considered. The beams under analysis was subjected to pure bending. The main aim was check the influence of ply arrangement on buckling load and postbuckling behaviour and validate the authors analytical-numerical method by commercial finite element method software. Mentioned analytical-numerical method has been developed for more than 25 years in Department of Strength of Materials. This method uses asymptotic Koiter theory for conservative systems in the second order approximation modified by Byskov and Hutchinson. Additionally, using the finite element method software the influence of ply arrangement on failure load were checked.

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