童浩, 袁昱超, 唐文勇. 新型船用复合材料夹芯夹筋厚板损伤行为分析[J]. 中国舰船研究, 2024, 19(X): 1–10. doi: 10.19693/j.issn.1673-3185.03434
引用本文: 童浩, 袁昱超, 唐文勇. 新型船用复合材料夹芯夹筋厚板损伤行为分析[J]. 中国舰船研究, 2024, 19(X): 1–10. doi: 10.19693/j.issn.1673-3185.03434
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TONG H, YUAN Y C, TANG W Y. Analysis of the damage behavior of new type of marine composite thick plate with reinforcing ribs and core material in the middle[J]. Chinese Journal of Ship Research, 2024, 19(X): 1–10 (in Chinese). doi: 10.19693/j.issn.1673-3185.03434
Citation: TONG H, YUAN Y C, TANG W Y. Analysis of the damage behavior of new type of marine composite thick plate with reinforcing ribs and core material in the middle[J]. Chinese Journal of Ship Research, 2024, 19(X): 1–10 (in Chinese). doi: 10.19693/j.issn.1673-3185.03434
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新型船用复合材料夹芯夹筋厚板损伤行为分析

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

    摘要
  • 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）的渐进损伤过程，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，相比于顺筋方向，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，最终形成界面破坏和面板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。

     

    Abstract:
    Objectives To solve the problem of applying thick carbon fiber laminates in naval architecture and marine Engineering, a thick plate structure with reinforcing ribs and core material in the middle composed of thin carbon fiber laminates is proposed.
    Methods Firstly, Based on the theory of continuous damage mechanics, two-dimensional Hashin failure criterion and cohesive element technology, the finite element analysis model of combined thick plate is established. Secondly, compare and analyze the bending performance of combined thick plate in different directions.Then, 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. The influence of adhesive strength on the damage behavior of the combined thick plate is also discussed.
    Results The results show that the bending stiffness of 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 the panel is the first to suffer damage, rapidly expanding 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 weak, the adhesive layer breaks first; When the adhesive strength is strong, the laminates breaks first. The adhesive layer mainly bears shear action under type II and III tearing modes, and the shear stress in the direction of reinforcing rib is the main reason for the initial damage of the adhesive layer.
    Conclusions Research on the damage behavior of a new type of combined thick plate during bending perpendicular to the stiffener direction, providing technical reference for the promotion and application of thick composite plates with reinforcing ribs and core material in the middle in major load-bearing structures in naval architecture and marine Engineering.

     

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