Nondestructive testing and control of the residual stress of rail in service

2016 ◽  
Author(s):  
Hai-bing Tian ◽  
Chun-guang Xu ◽  
Lian-pu Lin ◽  
Jun-feng Wang ◽  
Jian-feng Song
Keyword(s):  
Residual Stress ◽  
Nondestructive Testing ◽  
And Control

Macro-Residual Stress Field Retrieval for Predicting the Machining Deformation of Non-Prestretched Plate

2011 ◽  
Vol 317-319 ◽  
pp. 386-392
Author(s):  
Yin Fei Yang ◽  
Ning He ◽  
Liang Li
Keyword(s):  
Residual Stress ◽  
Stress Field ◽  
Large Scale ◽  
Hole Drilling ◽  
Residual Stress Field ◽  
Hole Drilling Method ◽  
Machining Deformation ◽  
Stress Changes ◽  
Drilling Method ◽  
And Control

The unknown and uneven macro-residual stresses in blanks will cause deformation on large-scale component, especially in non-prestretched plates. Based on the retrieval of stress field by measuring stress changes due to the rebalance of stresses after machining, a new idea is proposed in this paper to predict and control the machining deformation of large-scale components. It consists of analysis of the machining deformation, retrieval of macro-residual stress field, and finally optimization of following cutting process. In the retrieval process, the stresses are measured with an improved hole-drilling method and the measured data are then interpolated to 3D stress field.

scholarly journals Effects of Milling Parameters on Distribution of Residual Stress During the Milling of Curved Thin-Walled Parts

2019 ◽  
Vol 224 ◽  
pp. 05009
Author(s):  
Xiangjing Kong ◽  
Zishan Ding ◽  
Lijun Xu ◽  
Lijian Zhu ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Residual Stress ◽  
Curved Surface ◽  
Surface Residual Stress ◽  
Milling Parameters ◽  
Aerospace Research ◽  
Research Areas ◽  
Milling Simulation ◽  
Reasonable Range ◽  
Thin Walled ◽  
And Control

With the increasing application of curved thin-walled parts, the evaluation and control of curved surface residual stress in milling are becoming increasingly demanding. However, effects of milling parameters on distribution of residual stress remains a major challenge in the present aerospace research areas. In this paper, , impacts of milling parameters on curved surface residual stress have been investigated in a series of residual stress experiments and simulations. It is found that the residual stress can be lowered by increasing milling speed and tool radius within a reasonable range. The superposition of curved surface residual stress under two machining conditions have been analyzed using the milling simulation model. It has been found that the curved surface residual stress induced by the subsequent cutting will be superimposed on the curved surface residual stress induced by the previous cutting and that the superposition rates of residual stress induced by up milling are larger than down milling.

scholarly journals Nondestructive Testing Residual Stress Using Ultrasonic Critical Refracted Longitudinal Wave

2015 ◽  
Vol 70 ◽  
pp. 594-598 ◽  
Author(s):  
Chunguang Xu ◽  
Wentao Song ◽  
Qinxue Pan ◽  
Huanxin Li ◽  
Shuai Liu
Keyword(s):  
Residual Stress ◽  
Nondestructive Testing ◽  
Longitudinal Wave

Research on the Roller Intelligent Detection System Based on LabVIEW

2013 ◽  
Vol 438-439 ◽  
pp. 1084-1088
Author(s):  
Ummin Okumura ◽  
Yu Jie Qi ◽  
Yun Long ◽  
Tian Hang Zhang
Keyword(s):  
Nondestructive Testing ◽  
Real Time ◽  
Detection System ◽  
Detection Methods ◽  
Intelligent Detection ◽  
Speed Up ◽  
Compaction Control ◽  
And Control ◽  
Compaction Degree

Based on the platform of LabVIEW, a set of roller intelligent detecting system is developed. With this system, it is easy to realize functions of fast nondestructive testing of subgrade compaction degree, roller speed, rollers compaction trajectory, compaction times, GPS real-time positioning as well as saving and printing report forms. Compared with traditional detection methods, this detecting system can test and control on-site compaction quality much more easily, in order to speed up the construction progress, improve the quality of subgrade compaction, control and manage compaction work better.

The Influence of Residual Stresses on Dimension Stability during Thermal Mechanical Processes for High-Precision Components

2020 ◽  
Vol 982 ◽  
pp. 151-156
Author(s):  
Xun Qiao ◽  
Xu Feng Bai ◽  
Yi Zhang ◽  
Dong Rong Meng
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
High Precision ◽  
Recent Progress ◽  
Computational Techniques ◽  
Dimension Stability ◽  
Design And Manufacture ◽  
And Control ◽  
Modern Analytical ◽  
The Revolution

This paper mainly investigated the revolution of residual stresses and dimension stability in high-precision components during thermal-mechanical processes. Especially, originate of residual stress and its influences on dimension stability, from each step of the design and manufacture processes to thermal-mechanical processes, as well as their complicated interactions were elucidated in detail. Finally, the recent progress of modern analytical and computational techniques were discussed to provide possibilities to quantitative predict and control residual stresses and dimensional stabilities in high-precision components.

A Research on Nondestructive Testing to the Metal Welding Residual Stresses by the Laser - Generated Ultrasonic

2013 ◽  
Vol 850-851 ◽  
pp. 391-394
Author(s):  
Hai Tao Li
Keyword(s):  
Residual Stress ◽  
Nondestructive Testing ◽  
Residual Stresses ◽  
Welding Process ◽  
Ultrasonic Nondestructive Testing ◽  
Cooling Process ◽  
Laser Ultrasonic ◽  
Testing Technology ◽  
Internal Forces ◽  
Metal Welding

Because the local weld of the metal is affected by high temperature in the welding process, every temperature is always uneven after the completion of welding. so in the cooling process, the temperatures of the different dots cause different contractions .This situation will lead to internal forces. These forces will eliminate external variant part outside, but the internal residues still exist. They are the welding residual stresses. This paper mainly introduces the principle of laser ultrasonic nondestructive testing technology and laser ultrasonic nondestructive testing technology about the application and research of the residual stress in metal welding.

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