This project will focus on the effects of reduction of residual stress by applying non-harmonic vibratory forces to the structures, the innovative technique of easinating the reduction of stress by on-line measuring, and also on the development of an intelligent vibratory stress relief system. Our goals actually follow the achievements of previous related projects, which are understanding the mechanism of using Vibratory Stress Relief (VSR) on large-scale welding workpieces and determination of the process parameters. The research is separated into three parts. The first part is to conduct numerical analysis using finite element software, ANSYS, to study the effects of non-harmonic vibratory forces on the structures for reducing the residual stresses due to welding or other processes. The numerical results will be compared to the experimental results for validation. The second part is to develop the new technique of using strain gauges to calculate the change of residual stress. Finally, the third part of the project is to modify the prototype of intelligent vibratory stress relief equipment, built before, with auto-application of different types of vibratory forces and auto-detection of residual stresses. According to the status of residual stresses, this equipment can determine when to alter the type of vibratory forces for a better reduction effect. For realizing the better choice of forces, one needs the analysis of simulation results of non-harmonic forces. And, for obtaining the measurement of stresses in real time, one needs to convert the data from the strain gauges to the variation of residual stress. This technique will also be developed in the project.
|Effective start/end date||1/06/20 → 30/09/21|
UN Sustainable Development Goals
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):
- intelligent vibratory stress relief system
- non-harmonic vibratory force
- measurement of residual stress
- numerical and experimental results
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