游艇双轴碳/玻混杂层合板低速冲击特性及抗冲性能研究:试验-仿真协同与铺层创新设计

Low-Velocity Impact Characteristics and Impact Resistance Research of Biaxial Carbon/Glass Hybrid Laminates for Yachts: An Experimental-Simulation Synergy and Innovative Lay-up Design

  • 摘要: 【目的】针对游艇关键部位的抗冲击需求,探究不同铺层形式碳/玻纤维混杂层合板的低速冲击特性,以期突破以往单一材料结构的性能局限。【方法】依据ASTM D7136M-05标准,对实际游艇结构中应用的碳/玻纤维混杂层合板实施落锤冲击试验;融合Hashin失效准则与能量衰减演化方案构建Vumat子程序,对层合板的低速冲击过程进行精细化数值模拟;设计六种不同混杂形式层合板,从多个维度分析其冲击损伤特性及碳纤维位置影响。【结果】通过对比分析,数值仿真与试验结果在冲击峰值和吸收能量方面的误差分别控制在9.7%和4.6%,验证了仿真模型的有效性。对比不同的铺层形式发现:(C2G2)S型层合板展现出显著的抗冲击优势,其吸收能量值较其他铺层形式最大可提升34%,基体损伤体积是(G2C2)S型的1.4倍,而最大变形则较(G2C2)S型缩小了8%。【结论】该研究不仅证实了所构建的仿真模型能够精准模拟碳/玻纤维混杂层合板在低速冲击下的力学行为,而且揭示了不同铺层组合对层合板抗冲击性能的影响机制。研究成果为游艇复合材料结构的优化设计、冲击防护策略制定以及工程应用等提供了科学依据,对于推动游艇结构材料的创新与发展具有积极意义。

     

    Abstract: Objectives In consideration of the potential low-velocity impact risks faced by yachts during navigation, particularly in critical structural parts such as the bow and hull sides, higher requirements are imposed on the impact resistance of materials. The purpose of this study is to explore the mechanical response of different carbon/glass fiber hybrid laminates under low- velocity impact, in order to break the limitation of traditional single-material structures in terms of impact resistance, and provide a new idea for lightweight and high-strength design of yacht structures. Methods In accordance with ASTM D7136M-05, carbon fiber and glass fiber commonly used in the actual yacht structures were selected to design and prepare carbon/glass fiber hybrid laminates with the size of 150mm x 100mm as test objects. A drop-weight impact tester was employed to conduct low-velocity impact tests, simulating the potential low-velocity impact scenarios that yachts may encounter in real-world operating environments. Furthermore, to gain a deeper understanding of the damage mechanisms during impact, a high-precision Vumat subroutine was developed by integrating the Hashin failure criterion and an energy dissipation evolution scheme. This subroutine was utilized to perform detailed numerical simulations of the low-velocity impact process of the laminates. Based on this, six laminates with different layup forms were designed, and their impact damage characteristics, as well as the influence of carbon fiber position on the overall impact resistance of the laminates, were comprehensively analyzed from multiple dimensions, including lay-up sequence and interlayer interfaces. Results Through a comparison of numerical simulations and experimental results, it is found that the errors in terms of peak impact force and absorbed energy are both controlled at low levels, with the error in peak impact force being only 9.7% and the error in absorbed energy being 4.6%. This fully validates the effectiveness and accuracy of the simulation model. When comparing different lay-up configurations of the laminates, the (C2G2)S is found to exhibit significant advantages in impact resistance. Compared to other lay-up configurations, the (C2G2)S has the highest absorbed energy value, with an increase of up to 34%, indicating its superior ability to absorb and dissipate impact energy during the impact process. Although its matrix damage volume is 1.4 times that of the (G2C2)S, its maximum deformation is reduced by 8%, which further proves that (C2G2)S has excellent deformation resistance while maintaining high toughness. Conclusions Through the experimental-simulation synergy approach, this study not only validates the accuracy of the simulation model built for simulating the low-velocity impact behavior of carbon/glass fiber hybrid laminates, but also reveals the influence mechanism of different lay-up combinations on the impact resistance. These research findings provide a solid scientific basis for the optimal design of yacht composite structures, the formulation of impact protection strategies, and engineering applications. They hold significant theoretical guidance and practical application value for promoting innovation and development of yacht structural materials.

     

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