Simulation study on ultimate strength of CFRP-reinforced cracked stiffened panels

• Main Authors: Shi Xinghua, Ren Hengjia, Xu Wenqiang, Zhang Jing, Wu Haijian
• Format: Article
• Language: English
• Published: Editorial Office of Chinese Journal of Ship Research 2019-08-01
• Series: Zhongguo Jianchuan Yanjiu
• Subjects: Carbon Fiber Reinforced Polymer(CFRP); craked stiffened plate; ultimate strength; nonlinear finite element method
• Online Access: http://www.ship-research.com/EN/Y2019/V14/I4/47

<b>[Objectives]</b> In order to investigate the ultimate strength of CFRP-reinforced cracked stiffened panel in ship structure repair process,<b>[Methods]</b> in this paper,nonlinear finite element method is used to analyze the ultimate strength of CFRP-reinforced cracked stiffened panels subjected to axial compressive loads. Based on CFRP-reinforced cracked stiffened panel model,we compare the simulation results with the recorded test results,to verify the accuracy of the proposed method. By using double-side CFRP -reinforced cracked stiffened panel as the example,we study the ultimate strength of stiffened panel,and the peeling mechanism and the stress of the adhesive layer were analyzed.<b>[Results]</b> The results show that the ultimate strength of CFRP-reinforced cracked stiffened panels is significantly increased,and is close to the ultimate strength of stiffened panel with geometric initial defects;CFRP repairs the debonding of cracked stiffened panel after the ultimate strength is achieved.<b>[Conclusions]</b> The repair of the cracked stiffened panel by using CFRP can enhance the ultimate strength. It may provide guidance for the ships and offshore structure repair.