Numerical and Experimental Research on Distribution and Evolution of Coupling Residual Stresses Induced by Cutting-Welding Continuous Process
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论文类型：期刊论文
发表时间：2018-05-01
发表刊物：JOURNAL OF SHIP PRODUCTION AND DESIGN
收录刊物：SCIE
卷号：34
期号：2
页面范围：134-143
ISSN号：2158-2866
关键字：continuous process; coupling residual stress; stress evolution; initial stress
摘要：Thermal cutting and welding are usually applied on component sequentially in ship-building, and the coupling residual stresses will be induced during this continuous process, which make the residual stress distribution different to that induced by single process. This research took a typical continuous process as the object: first, the mild steel plate was cut in half by oxygen flame, and then welded together. Based on the regression equations of initial residual stress distribution induced by cutting, a simplified numerical model was presented to investigate the distribution and evolution of coupling residual stresses with stress measurement validation based on X-ray diffraction. The research concluded that the distribution of coupling residual stresses, induced by cutting-welding continuous process, is mainly affected by the process, which can generate a wider distribution of high stresses. The evolution of coupling stresses is determined by the distance to seam (Gamma(1)similar to Gamma(3)) and the period undergoing (T-1 similar to T-3), and the influence of initial residual stresses on coupling stresses was also investigated.
发表时间：2018-05-01