Numerical and experimental analysis of permeation and cracking behavior of fiber reinforced plastic composites with thermoplastic matrix system

热塑性基体系统纤维增强塑料复合材料渗透和开裂行为的数值和实验分析

• 批准号: 496642725
• 负责人: Professor Dr.-Ing. Maik Gude
• 金额: --
• 依托单位: Institut für Leichtbau und Kunststofftechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/496642725?language=en
• 关键词: Numerical; experimental; analysis; permeation; cracking

Achieving greenhouse gas neutrality is essential to limit human-caused climate change. In Germany, this goal is to be achieved by 2045. In the upcoming technological change, hydrogen plays a key role in almost all scenarios as a versatile and - if produced with renewable energies - environmentally friendly energy carrier to ensure the long-term success of the energy transition and climate protection.Among the available storage systems for hydrogen, pressurized storage systems made of fiber-reinforced plastic composites (FRP) represent a promising technology for mobile applications due to their comparatively high storage density and low mass. In particular, scientists and engineers are focusing on so-called multi-cell storage systems, which provide a circuit of cylindrical tank cells and can thus make efficient and flexible use of the available installation space. A disadvantage, however, is the diminished sheath surface -to-storage volume ratio, which means that higher liner wall thicknesses are required to meet permeation and leakage requirements. One solution to this problem is linerless designs (Type-V pressure tanks), in which the FRP simultaneously functions as a support structure and permeation barrier. However, the implementation of the Type-V design requires an in-depth understanding of the permeation behavior of FRP. Due to the highly loaded pressure tank walls, the influence of damage on permeation must be investigated to be able to overcome the challenges through adapted materials as well as structural designs.With this background, the primary objective of the project is the qualitative and quantitative analysis as well as the model-based description of the permeation behavior of continuous reinforced textile composites with thermoplastic matrix (PA 6). For this purpose, experimental methods in the field of CT imaging analysis as well as numerical crack modeling by means of the phase field method will be advanced and used for the analysis of crack patterns. AI-based models for crack prediction, quantification and classification are developed, validated and contribute for future permeation assessment of textile architectures. Furthermore, the influence of crack opening is investigated in in-situ permeation tests and a numerical permeation model is derived. A profound understanding of the correlation between crack and permeation phenomena for composites with textile reinforcement architectures will be provided in order to establish the basis for a successful design and layout of linerless construction-efficient pressure tanks and pipelines.

实现温室气体中性对于限制人类造成的气候变化至关重要。在德国，这一目标将在2045年实现。在即将到来的技术变革中，氢气作为一种多功能的能源载体(如果使用可再生能源生产)将在几乎所有场景中发挥关键作用，以确保能源转换和气候保护的长期成功。在现有的氢气存储系统中，由纤维增强塑料复合材料(FRP)制成的加压存储系统由于其相对较高的存储密度和较低的质量，在移动应用中代表着一种有前途的技术。特别是，科学家和工程师们将重点放在所谓的多电池存储系统上，这种系统提供圆柱形水箱电池的电路，从而可以有效和灵活地利用可用的安装空间。然而，缺点是护套表面与存储体积的比率减小，这意味着需要更高的衬里壁厚来满足渗透和泄漏要求。这个问题的一个解决方案是无衬里设计(类型-V压力容器)，在这种设计中，玻璃钢同时起到支撑结构和渗透屏障的作用。然而，V型设计的实施需要深入了解玻璃钢的渗透行为。由于压力容器壁负荷很高，必须研究损伤对渗透的影响，以便能够通过合适的材料和结构设计来克服这些挑战。在这种背景下，本项目的主要目标是定性和定量分析以及基于模型的描述热塑性树脂基连续增强纺织复合材料的渗透行为(PA 6)。为此，将提出CT成像分析领域的实验方法以及利用相场法进行裂纹数值模拟，并将其用于裂纹模式的分析。开发了基于人工智能的裂缝预测、量化和分类模型，并对其进行了验证，为未来纺织建筑的渗透性评估做出了贡献。在此基础上，研究了现场渗透试验中裂缝张开对渗透性能的影响，建立了渗流数值模型。深入了解纤维增强复合材料的裂缝和渗透现象之间的相互关系，为成功设计和布置无衬砌结构高效压力容器和管道奠定基础。