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发表时间： 2016-01-01

发表刊物： 中国舰船研究

所属单位： 运载工程与力学学部

期号： 5

页面范围： 91-99

ISSN号： 1673-3185

摘要： Ultrasonic Impact Treatment(UIT)has recently attracted considerable attention in the ship in?dustry as an effective post-welding improvement method for welded joints. In order to evaluate the effect of UIT on the fatigue properties of welded joints,we propose a novel numerical analysis approach including welding simulation,dynamic elastic-plastic Finite Element Analysis(FEA)of the UIT process,and the evaluation of the fatigue strength of welded joints based on fracture mechanics. In the FEA model,the actu?al process parameters and ultrasonic-induced material softening,appropriately adjusted to fit the experi?mental results, are considered. The predicted residual stress distributions and fatigue strength of non-load-carrying cruciform joints before and after UIT are compared with the experimental results,and show a fairly high level of agreement.

备注： 新增回溯数据