新型船用复合材料夹芯夹筋厚板损伤行为分析  

Analysis of damage behavior of new-type marine composite thick plate with reinforcing ribs and core material in middle

作　　者：童浩 袁昱超 唐文勇[1,2] TONG Hao;YUAN Yuchao;TANG Wenyong(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学海洋工程全国重点实验室,上海200240 [2]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《中国舰船研究》2024年第5期131-140,共10页Chinese Journal of Ship Research

基　　金：中国科协创新融合学会联合体青年人才托举工程资助项目;中国船舶集团有限公司-上海交通大学海洋装备前瞻创新联合基金资助项目。

摘　　要：[目的]为解决大厚度碳纤维层合板在船海领域应用难的问题,提出一种由薄板组合成型的夹筋夹芯厚板结构。[方法]首先,基于连续损伤力学理论、二维Hashin失效准则和内聚力单元技术,建立组合厚板有限元分析模型;然后,对比分析组合厚板不同方向的弯曲性能;接着,通过分析胶层和碳纤维增强基复合材料(CFRP)的渐近损伤过程,研究组合厚板在垂直筋方向弯曲过程中的破坏行为和失效机制,并讨论胶接强度对组合厚板损伤行为的影响。[结果]结果显示,相比顺筋方向,组合厚板垂直筋方向的弯曲刚度更高;在垂直筋方向弯曲过程中,筋板与面板界面处的胶层首先会出现损伤,然后在剪切力的作用下迅速扩展,最终形成界面破坏与面板0°铺层纤维撕裂相互促进的混合失效模式。胶接强度较弱时,胶层先损伤;胶接强度较强时,层合板先损伤。胶层主要承受Ⅱ型和Ⅲ型撕裂模式下的剪切作用,其中顺筋方向的剪切应力是胶层出现初始损伤的主要原因。[结论]研究新型组合厚板在垂直筋方向弯曲过程中的损伤行为,可为大厚度复合材料夹芯夹筋板在船海主承力结构上的推广应用提供技术参考。[Objectives]To solve the problem of applying thick carbon fiber laminates in naval architecture and marine engineering,this paper proposes a thick plate structure composed of thin carbon fiber laminates with reinforcing ribs and core material in the middle.[Methods]First,based on the theory of continuous damage mechanics,two-dimensional Hashin failure criterion and cohesive element technology,a finite element analysis model of a combined thick plate is established.Second,the bending performance of the combined thick plate in different directions is compared and analyzed.Next,the progressive damage process of the adhesive layer and carbon fibre-reinforced polymer(CFRP)is analyzed to investigate the failure behavior and mechanisms of the combined thick plate during the bending process in the direction perpendicular to the stiffeners.Finally,the influence of adhesive strength on the damage behavior of the combined thick plate is discussed.[Results]The results indicate that the bending stiffness of the combined thick plate is higher in the direction perpendicular to the stiffeners compared to the parallel direction.During the bending process perpendicular to the reinforcing rib direction,the adhesive layer at the interface between the rib plate and panel is the first to suffer damage;it rapidly expands under shear force,ultimately forming a mixed failure mode where interface failure and panel 0°ply fiber tearing promote each other.When the adhesive strength is low,the adhesive layer breaks first;and when the adhesive strength is high,the laminates break first.The adhesive layer mainly bears shear action under Types II and III tearing modes,and the shear stress in the direction of the reinforcing rib is the primary cause of initial damage to the adhesive layer.[Conclusions]This study reveals the damage behavior of a new-type composite thick plates during bending perpendicular to the stiffener direction,thereby providing technical references for the promotion and application of thick composite plates with reinforcing

关 键 词：碳纤维 大厚度板 胶接 损伤演化 数值模拟 

分 类 号：U668.5[交通运输工程—船舶及航道工程]