J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (06): 861-864.
• Articles • 上一篇
FORECAST OF LARGE STRUCTURE’S WELDING RESIDUAL STRESS BY SIMILITUDE PRINCIPLES
姬书得
- 沈阳航空工业学院
Prediction of Large Structure Welding Residual Stress by Similitude Principles
Shude Ji1), Liguo Zhang1), Xuesong Liu2), Jianguo Yang2)
- 1) School of Aerospace Engineering, Shenyang Institute of Aeronautical Engineering, Shenyang 110034, China
2) State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China
摘要：
On basis of the similitude principles, the conception of virtual simulative component and the auxiliary value of welding residual stress, which is deduced by the welding conduction theory, the relation of the welding residual stress between the simulative component and the practical component was attained. In order to verify
the correctness of the relation, the investigation was done from the view of the welding experiment and the numerical simulation about the simulative component and the practical component. The results show that the distribution of welding residual stress of the simulative component is the same as that of the practical component. The ratio of welding residual stress attained by the experiment or the simulation method between the practical runner and the simulative component was compared with the ratio obtained by the similitude principles. Moreover, the error is less than 10%. This provides a new idea to predict the welding stress distribution of large practical structure by the contractible physical model, which is important for the welding experiment and the numerical simulation.