Ceramic Matrix Composites Condition Assessment and Damage Monitoring

陶瓷基复合材料状态评估和损伤监测

• 批准号: 2276619
• 金额: --
• 依托单位: Swansea University
• 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-2276619
• 关键词: Ceramic; Matrix; Composites; Condition; Assessment

Ceramic matrix composites (CMCs) have long been considered for high temperature application within the gas turbine engine, and some advanced designs now incorporate these. There is a strong commercial drive to implement CMCs into future civil engine designs, mainly as a means to increase engine operation temperatures, improve fuel efficiency and reduce greenhouse gas emissions. The objective of the project is to explore techniques applicable for condition assessment and damage monitoring of CMCs. These potentially include methods such as microwave dielectric spectroscopy, dynamic modulus loss tangent (in conjunction with interrupted fatigue), process compensated resonance testing and terahertz imaging. In each case assessing the condition of test coupons with a view to sentencing parts at one shop visit for pass-on to a second service interval.The use of X-ray Computed Tomography (CT) to understand how damage propagates in CMCs may improve understanding and help to inform the condition assessment techniques as well as understand the influence of material surface condition. Additionally, investigations into the difference in damage propagation characteristics of CMCs with design relevant architectures will complement the ongoing CMC research development programmes within Rolls-Royce plc.

长期以来，陶瓷基复合材料(CMCs)一直被认为是用于燃气轮机的高温应用，现在一些先进的设计将其纳入其中。将CMCS应用到未来的民用发动机设计中有着强大的商业动力，主要是作为一种提高发动机运行温度、提高燃料效率和减少温室气体排放的手段。该项目的目标是探索适用于CMC状态评估和损坏监测的技术。这些潜在的方法包括微波介电光谱学、动态模损正切(结合间断疲劳)、过程补偿共振测试和太赫兹成像。在每种情况下，评估测试优惠券的状况，以期在一次商店访问中判定部件是否传递到第二个服务间隔。使用X射线计算机断层扫描(CT)来了解CMC中的损伤是如何传播的，可能会加深理解，并有助于了解状况评估技术以及了解材料表面状况的影响。此外，对CMC的损伤传播特性与设计相关架构的差异的调查将补充劳斯莱斯公司正在进行的CMC研究开发计划。