Experimental study of the effect of technological parameters on the residual stresses in thin-walled coiled parts

1974 ◽  
Vol 8 (1) ◽  
pp. 63-67
Author(s):  
E. M. Varushkin ◽  
V. I. Polyakov ◽  
Yu. A. Lapin
Keyword(s):  
Experimental Study ◽  
Residual Stresses ◽  
Technological Parameters ◽  
Thin Walled

Residual Stresses in Thin-walled Hot Chamber Die Cast AZ91d; an Experimental Study

Magnesium ◽  
2005 ◽  
pp. 700-705
Author(s):  
Anders Eric Wollmar Jarfors ◽  
Tan Ming Jen ◽  
Jonas. Bäckman
Keyword(s):  
Experimental Study ◽  
Residual Stresses ◽  
Die Cast ◽  
Thin Walled

Residual Stresses and Accuracy of Pipe Preparations by Manufacture Zirconium Tubes for the Nuclear Industry

2006 ◽  
Vol 524-525 ◽  
pp. 703-708 ◽  
Author(s):  
G. Kolmogorov ◽  
E. Kuznetsova ◽  
V. Filippov
Keyword(s):  
Mechanical Properties ◽  
Residual Stresses ◽  
Zirconium Alloys ◽  
Deformation Energy ◽  
Nuclear Industry ◽  
Technological Parameters ◽  
Actual Problem ◽  
Production Technologies ◽  
Thin Walled ◽  
Fuel Elements

The production technologies development of thermonuclear reactors is a actual problem of today. The work researches zirconium goods used in the atomic industry – thin-walled tubes for the fuel elements shells, thin-walled tubes for the channels of watery and boiling reactors, rods for lock – plugs of fuel elements; mechanical properties of zirconium and zirconium alloys, production methods and technologies as well. The power approach is used in the work. The potential energy of the elastic deformation is regarded as a part of the plastic deformation energy and a portion of the energy used for residual stresses formation. Using these methods the distributions of residual stresses are determined by the volume of a product depending on the main technological parameters of a process and mechanical properties of the material. The results have shown that hoop stresses take maximum values. The activity of residual stresses can lead to the elastic deformations and to the departure from the rated dimensions of a product, subsequently, that is inadmissible for the precision parts. These methods are used to determine the influence of residual stresses on mechanical properties, precision and operating strength of tube products made of different zirconium alloys.

scholarly journals Cold Forging Effect on the Microstructure of Motorbike Shock Absorbers Fabricated by Tube Forming in a Closed Die

2021 ◽  
Vol 11 (5) ◽  
pp. 2142
Author(s):  
Trung-Kien Le ◽  
Tuan-Anh Bui
Keyword(s):  
Material Flow ◽  
Cold Forging ◽  
Technological Parameters ◽  
Forming Process ◽  
Tube Forming ◽  
Shock Absorbers ◽  
Thin Walled Tube ◽  
Thin Walled ◽  
Quality Of Products ◽  
Forming Defects

Motorbike shock absorbers made with a closed die employ a tube-forming process that is more sensitive than that of a solid billet, because the tube is usually too thin-walled to conserve material. During tube forming, defects such as folding and cracking occur due to unstable tube forming and abnormal material flow. It is therefore essential to understand the relationship between the appearance of defects and the number of forming steps to optimize technological parameters. Based on both finite element method (FEM) simulations and microstructural observations, we demonstrate the important role of the number and methodology of the forming steps on the material flow, defects, and metal fiber anisotropy of motorbike shock absorbers formed from a thin-walled tube. We find limits of the thickness and height ratios of the tube that must be held in order to avoid defects. Our study provides an important guide to workpiece and processing design that can improve the forming quality of products using tube forming.

scholarly journals Experimental Study on The Flexural Capacity of Cold-Formed Thin-Walled Composite Wall

2020 ◽  
Vol 455 ◽  
pp. 012060
Author(s):  
Quan Wang ◽  
Guohua Li ◽  
Yanqiang Di ◽  
Yuxia Zhang ◽  
Zhijie Zhang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Flexural Capacity ◽  
Composite Wall ◽  
Thin Walled

Analysis of circumferentially welded thin-walled cylinders to study the effects of tack weld orientations and joint root opening on residual stress fields

2009 ◽  
Vol 223 (5) ◽  
pp. 1037-1049 ◽  
Author(s):  
N U Dar ◽  
E M Qureshi ◽  
A M Malik ◽  
M M I Hammouda ◽  
R A Azeem
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Arc Welding ◽  
Operating Conditions ◽  
Stress Fields ◽  
Welded Structures ◽  
Prime Concern ◽  
Thin Walled ◽  
Tack Weld ◽  
Welding Processes

In recent years, the demand for resilient welded structures with excellent in-service load-bearing capacity has been growing rapidly. The operating conditions (thermal and/or structural loads) are becoming more stringent, putting immense pressure on welding engineers to secure excellent quality welded structures. The local, non-uniform heating and subsequent cooling during the welding processes cause complex thermal stress—strain fields to develop, which finally leads to residual stresses, distortions, and their adverse consequences. Residual stresses are of prime concern to industries producing weld-integrated structures around the globe because of their obvious potential to cause dimensional instability in welded structures, and contribute to premature fracture/failure along with significant reduction in fatigue strength and in-service performance of welded structures. Arc welding with single or multiple weld runs is an appropriate and cost-effective joining method to produce high-strength structures in these industries. Multi-field interaction in arc welding makes it a complex manufacturing process. A number of geometric and process parameters contribute significant stress levels in arc-welded structures. In the present analysis, parametric studies have been conducted for the effects of a critical geometric parameter (i.e. tack weld) on the corresponding residual stress fields in circumferentially welded thin-walled cylinders. Tack weld offers considerable resistance to the shrinkage, and the orientation and size of tacks can altogether alter stress patterns within the weldments. Hence, a critical analysis for the effects of tack weld orientation is desirable.

Effects of Cutting Parameters on Residual Stresses in High-Speed Milling of Ti-17

2013 ◽  
Vol 834-836 ◽  
pp. 861-865 ◽  
Author(s):  
Yong Shou Liang ◽  
Jun Xue Ren ◽  
Yuan Feng Luo ◽  
Ding Hua Zhang
Keyword(s):  
Experimental Study ◽  
Residual Stresses ◽  
High Speed ◽  
Experimental Parameter ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Single Factor ◽  
Cutting Depth ◽  
High Speed Milling ◽  
Parameter Ranges

An experimental study was conducted to determine cutting parameters of high-speed milling of Ti-17 according to their effects on residual stresses. First, three groups of single factor experiments were carried out to reveal the effects of cutting parameters on residual stresses. Then sensitivity models were established to evaluate the influence degrees of cutting parameters on residual stresses. After that, three criteria were proposed to determine cutting parameters from experimental parameter ranges. In the experiments, the cutting parameter ranges are recommended as [371.8, 406.8] m/min, [0.363, 0.412] mm and [0, 0.018] mm/z for cutting speed, cutting depth and feed per tooth, respectively.

Buckling behaviors of thin-walled cylindrical shells under localized axial compression loads, Part 1: Experimental study

2021 ◽  
Vol 166 ◽  
pp. 108118
Author(s):  
Peng Jiao ◽  
Zhiping Chen ◽  
He Ma ◽  
Peng Ge ◽  
Yanan Gu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Axial Compression ◽  
Cylindrical Shells ◽  
Thin Walled
Sign in / Sign up

Export Citation Format

Share Document