Spring-back analysis in the cold-forming process of ship hull plates

• DOI: 10.1007/s00170-018-1741-3
• Publication Date: 2018-02-23T18:06:29Z
• Authors: Wei Shen; Renjun Yan; Shuangyin Li; Lin Xu
• Keywords: 0203 mechanical engineering; 02 engineering and technology

Hull structures and offshore structures are composed of curved thick plates. Line heating method has traditionally been used to produce such curved plates. However, it is recognized that the hot-forming process causes a variety of issues on doubly or multiple curved plates. A multi-point forming mechanism with square press heads is a new forming process for 3D ship hull plate. Cold working has a high dimensional accuracy but results in spring-back. In this paper, the cold-forming process using explicit dynamic finite element method (FEM) and its spring-back process using implicit FEM were analyzed, and the impact of curvature and thickness on spring-back of hull plates was discussed. Moreover, the validity of the numerical method was confirmed by comparison with experimental results.