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.

实现温室气中立对于限制人为引起的气候变化至关重要。 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由于其相对较高的存储密度和低质量而引起的应用。特别是，科学家和工程师专注于所谓的多细胞存储系统，这些存储系统提供了圆柱形罐电池的电路，因此可以使可用的安装空间有效，灵活地使用。然而，缺点是鞘表与储存量的减小，这意味着需要更高的衬里壁厚以满足渗透和泄漏要求。解决此问题的一种解决方案是无衬板设计（V型压力箱），其中FRP同时起着支撑结构和渗透性屏障的作用。但是，类型V设计的实现需要深入了解FRP的渗透行为。由于高负载的压力箱墙，必须研究损坏对渗透的影响，以便能够通过改编的材料和结构设计克服挑战。在此背景下，该项目的主要目的是定性和定量分析以及基于模型的基于模型的渗透性描述，对与热塑性型配音的连续增强复合物的连续增强化合物的渗透行为（pa 6）。为此，将提出并将通过相场方法进行CT成像分析领域以及数值裂纹建模的实验方法，并用于分析裂纹模式。开发，验证，验证并为纺织架构的未来渗透评估开发，验证和贡献基于AI的裂纹预测模型。此外，在原位渗透测试中研究了裂纹打开的影响，并得出了数值渗透模型。将提供对与纺织增强架构的复合材料的裂纹和渗透现象之间的相关性的深刻理解，以建立成功设计和布局的基础，并布局无固定的施工有效的压力箱和管道。