Through-Life Design, Inspection and Repair of Marine Composite Materials

船用复合材料的全寿命设计、检查和修复

• 批准号: 2273988
• 金额: --
• 依托单位: University of Edinburgh
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2273988
• 关键词: Through; Life; Design; Inspection; Repair

The behaviour of composite materials in harsh, marine environments is still not well understood, and predictability of composite lifetime fatigue performance is low. As a result, repair protocols are very conservative with frequent maintenance interventions and a high rate of part replacement.This project will work on the development of monitoring protocols and life cycle prediction software for composites used in marine environments. The specific composites in question will be laminated glass- and carbon- fibre reinforced epoxy and polyester/vinyl ester components. This will include research and evaluation of current monitoring technologies used for all materials (and hence their adaptability to composites), before testing specific commercial-type composites using ultrasound scanning, and validating the correct diagnosis of onset of fatigue via these scans.The types of composite response monitored will include the effects of operational mechanical stress, vibration, delamination, thermal expansion, and water ingress. Once a complete knowledge of all possible types of loading and their diagnostic signs are established, then formal testing on specimens will occur both locally and at a partner's industrial setting with a focus on their existing assets.Should these tests be successful, a complete monitoring methodology will be proposed for the life maintenance of marine composites, with the aim of significantly reducing expenditure in the field and preventing catastrophic structural failures. It is also planned to develop computer software to predict composite performance over long periods of time, before validating the model with tests on parts exposed to calibrated damage and then implementing these models to predict the use life and repair state of particular field components/structures.

复合材料在恶劣的海洋环境中的行为仍然没有得到很好的理解，复合材料寿命疲劳性能的可预测性很低。因此，维修方案非常保守，维修干预频繁，零件更换率高。本项目将致力于开发海洋环境中使用的复合材料的监测方案和生命周期预测软件。具体的复合材料的问题将层压玻璃和碳纤维增强环氧树脂和聚酯/乙烯基酯成分。这将包括研究和评估目前用于所有材料的监测技术（以及它们对复合材料的适应性），然后使用超声扫描测试特定的商业型复合材料，并通过这些扫描验证疲劳发作的正确诊断。监测的复合材料响应类型将包括操作机械应力、振动、分层、热膨胀和进水的影响。一旦对所有可能的载荷类型及其诊断标志有了完整的了解，将在当地和合作伙伴的工业环境中对样品进行正式测试，重点是其现有资产。如果这些测试成功，将为船用复合材料的寿命维护提出完整的监测方法，目的是大幅减少实地支出，防止灾难性的结构故障。还计划开发计算机软件，预测长期的复合材料性能，然后对受到校准损坏的部件进行测试，验证模型，然后实施这些模型，预测特定现场部件/结构的使用寿命和维修状态。