Finite element simulation of laser tube bending: Effect of scanning schemes on bending angle, distortions and stress distribution

2007 ◽  
Vol 39 (6) ◽  
pp. 1101-1110 ◽  
Author(s):  
Shakeel Safdar ◽  
Lin Li ◽  
M.A. Sheikh ◽  
Zhu Liu
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Finite Element Simulation ◽  
Tube Bending ◽  
Bending Angle ◽  
Laser Tube ◽  
Bending Effect ◽  
Element Simulation

scholarly journals A Finite Element Simulation of Nano Effects on Stress Distribution in a Below Knee Prosthetic

2021 ◽  
Vol 1067 (1) ◽  
pp. 012141
Author(s):  
Muhsin J. Jweeg ◽  
H. A. Hamzah ◽  
Muhannad Al-Waily ◽  
Mohsin Abdullah Al-Shammari
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Finite Element Simulation ◽  
Element Simulation

Research on the Connection Performance of Variable Pitch of Screw Threaded Casing Based on 3D Finite Element Simulation Model

2012 ◽  
Vol 215-216 ◽  
pp. 1105-1110 ◽  
Author(s):  
Xiong Guo ◽  
Lv Long Zou ◽  
Bing Lu ◽  
Shi Liang Zhang ◽  
Xing Ren Su ◽  
...  
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Finite Element Simulation ◽  
Element Model ◽  
Static Structure ◽  
3D Finite Element ◽  
Variable Pitch ◽  
Element Simulation ◽  
Ansys Workbench

The connection performance of the large taper, multi-thread, variable pitch of screw threaded casing is researched by 3D finite element simulation on ANSYS Workbench. The 3D finite element model is created precisely. The stress distribution on the teeth of three kind variable pitch of screw threaded structure is studied by using the static structure of the contact analysis module. Contrasting stress distribution of the variable pitch of screw with of the equal pitch of screw under the same working condition, it is validated that design principle for the variable pitch of screw connection is correct. The influence of changes in the amount of variable pitch of screw to the whole stress distribution on teeth is discussed. The results show that the force distribution on the teeth of the variable pitch of screw connection is more uniform than equal pitch of screw, and will improve the overall carrying capacity. This study has its practical value to improve the connective performance of the threaded casing and enhance the product quality of threaded casing.

Finite Element Simulation and Numerical Analysis in the Process of Tube Bending

2011 ◽  
Vol 421 ◽  
pp. 14-18 ◽  
Author(s):  
Xiao Bing Xu ◽  
Tian Kai Xiong ◽  
Qiang Guan ◽  
Li Jun Tan
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Wall Thickness ◽  
Contact Boundary ◽  
Fe Model ◽  
Tube Bending ◽  
Element Simulation ◽  
Key Techniques ◽  
Variation Trends ◽  
Inside Wall

In this paper, a 3D-FE model in process of tube bending is built under the ABAQUS/Explicit environment based on the solution of several key techniques, such as contact boundary condition, material properties definition and meshing technology, etc. The results show that both friction coefficients and bending angles have an important influence on the wall thickness of tubes. The variation trends of outside and inside wall thickness are found out by using finite element simulation. The achievements of this study may provide some advice for experiments and manufactures.

scholarly journals Modification of Residual Stresses in Laser Additive Manufactured AlSi10Mg Specimens Using an Ultrasonic Peening Technique

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 455 ◽  
Author(s):  
Xiaodong Xing ◽  
Xiaoming Duan ◽  
Xiaojing Sun ◽  
Haijun Gong ◽  
Liquan Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Finite Element ◽  
Stress Distribution ◽  
Residual Stresses ◽  
Finite Element Simulation ◽  
Residual Stress Distribution ◽  
Ultrasonic Peening ◽  
Element Simulation ◽  
Before And After

Ultrasonic peening treatment (UPT) has been proved to be an effective way of improving residual stresses distribution in weld structures. Thus, it shows a great potential in stress modification for metal parts fabricated by additive manufacturing technology. In this paper, an investigation into the ultrasonic treatment process of AlSi10Mg specimens fabricated by selective laser melting (SLM) process was conducted by means of experimental and numerical simulation. The specimens were prepared using a SLM machine, and UPT on their top surface was carried out. The residual stresses were measured with an X-ray stress diffraction device before and after UPT. Meanwhile, a finite element simulation method for analyzing the influence of UPT on the residual stress field of specimens was proposed and validated by experiments. Firstly, the thermal mechanical coupling numerical simulation of the SLM process of the specimen was carried out in order to obtain the residual stress distribution in the as-fabricated specimen. Then, the transient dynamic finite element simulation model of the UPT process of the specimen was established, and the UPT effect analysis was implemented. In the UPT simulation, the residual stress was applied as a pre-stress on the specimen, and the specimen’s material mechanical property was described by the Johnson–Cook model, whose parameters were determined by Split Hopkinson Pressure Bar (SHPB) experiment. The residual stress distribution before and after UPT predicted by the finite element model agree well with the measurement results. This paper concludes with a discussion of the effects of ultrasonic peening time, as well as the frequency and amplitude of the peening needle on residual stress.

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