PFI:AIR - TT: Multi-scale and in-situ sensing technology for structural integrity

PFI:AIR - TT：用于结构完整性的多尺度原位传感技术

• 批准号: 1701983
• 负责人: Seetha Raghavan
• 金额: $ 20万
• 依托单位: The University of Central Florida Board of Trustees
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-07-15 至 2021-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1701983&HistoricalAwards=false
• 关键词: PFI; AIR; TT; Multi; scale

This PFI: AIR Technology Translation project focuses on translating a novel multi-scale sensing technology to fill the technology void in high-spatial resolution, non-invasive and non-contact measurement of material stresses and damage.  The system is important because it provides structural integrity assessments in critical components for applications ranging from aerospace structures including metallics and composites to civil structures such as steel gussets in bridges and buildings to enhance safety. The project will result in the development and scale-up of multi-scale, in-situ piezospectroscopic technology. This uses a stress sensitive photo-luminescent material that can be embedded in coatings on various structures. The stress distribution is monitored based on optics technology which measure shifts in the emission spectrum that are related to stress. This has the following unique features: capability to provide intrinsic measurements of material stress; multi-scale spatial resolution; in-situ measurements under various loading conditions. These features provide the following advantages: quantitative stress determination for a variety of structural substrates of metallic and composite origin under various load environments, as well as demonstrated early damage detection when compared to the leading competing non-invasive techniques such as Digital image correlation in this market space.  This project addresses the following technology gaps as it translates from research discovery toward commercial application; i) materials technology - the deployment of sensing material needs to be optimized to define a process configuration that ensures excellent bonding and uniform dispersion of particles for effective and reliable sensing performance ii) optics technology - the measurement of photo-luminescence emission from the particles must be improved from point detection to area detection methods while ensuring current spatial and stress resolution capabilities are maintained for efficient inspection technology. In addition, personnel involved in this project, including a graduate and undergraduate student, will receive technology translation experiences through industry collaboration and UCF's resources for entrepreneurship, which facilitates opportunities such as the use of Maker Spaces and access to participation in the NSF ICorps program at UCF's I-Corps Site. The project engages Lumium, an optical measurements company, and Imperial College in London to overcome challenges in area scanning and effective dispersion in this technology translation effort from research discovery toward commercial reality.

该PFI：AIR技术翻译项目的重点是翻译一种新的多尺度传感技术，以填补高空间分辨率，非侵入性和非接触式测量材料应力和损伤的技术空白。 该系统很重要，因为它为关键部件提供结构完整性评估，应用范围从航空航天结构（包括金属和复合材料）到民用结构（例如桥梁和建筑物中的钢角撑板），以提高安全性。该项目将导致多尺度、原位压电光谱技术的开发和扩大。这使用了一种应力敏感的光致发光材料，可以嵌入各种结构上的涂层中。基于光学技术监测应力分布，该光学技术测量与应力相关的发射光谱中的偏移。它具有以下独特的功能：提供材料应力的内在测量能力;多尺度空间分辨率;在各种载荷条件下的原位测量。这些功能提供了以下优势：在各种载荷环境下对金属和复合材料来源的各种结构基材进行定量应力测定，以及与该市场领域领先的竞争性非侵入性技术（如数字图像相关性）相比，证明了早期损伤检测。 该项目解决了以下技术差距，因为它从研究发现转化为商业应用; i）材料技术-传感材料的部署需要被优化以限定工艺配置，该工艺配置确保颗粒的良好结合和均匀分散，以实现有效和可靠的传感性能ii）光学技术-光的测量从点检测到区域检测方法，必须改进来自颗粒的发光发射，同时确保维持当前的空间和应力分辨率能力以用于有效的检查技术。此外，参与该项目的人员，包括研究生和本科生，将通过行业合作和UCF的创业资源获得技术翻译经验，这将促进机会，例如使用Maker Spaces和参与NSF ICorps计划在UCF的I-Corps网站。该项目与光学测量公司Lumium和伦敦帝国理工学院合作，克服区域扫描和有效分散方面的挑战，将这项技术从研究发现转化为商业现实。

项目成果

3D Printed Stress Sensors for Non-Destructive Evaluation of Space Structures

用于空间结构无损评估的 3D 打印应力传感器

• 发表时间: 2021
• 期刊: April 2021.
• 作者: Perla Latorre-Suraez, Rohan Madathil

Application of Stress Sensing Coatings on Metal Substrates with a Sub-surface Notch

应力传感涂层在具有次表面缺口的金属基材上的应用

• DOI: 10.2514/6.2019-1969
• 发表时间: 2019
• 期刊: AIAA Scitech 2019 Forum
• 作者: Esteves, Remelisa;Hoover, Ryan;Vo, Khan;Jahan, Sanjida;Haldar, Sandip;Raghavan, Seetha
• 通讯作者: Raghavan, Seetha

Piezospectroscopic coatings: Effects of alumina nanoparticle volume fraction on stress-sensing.

压电光谱涂层：氧化铝纳米粒子体积分数对应力传感的影响。

• 发表时间: 2018
• 期刊: Calif
• 作者: Remelisa Esteves, Ryan Hoover

Functional Coatings for Damage Detection in Aerospace Structures

用于航空航天结构损伤检测的功能涂层

• DOI: 10.21300/21.4.2021.10
• 发表时间: 2021
• 期刊: Technology & Innovation
• 影响因子: 0.5
• 作者: Demay, Agathe;Hernandez, Johnathan;Latorre, Perla;Esteves, Remelisa;Raghavan, Seetha
• 通讯作者: Raghavan, Seetha

Measurements for stress sensing of composites using tailored piezospectroscopic coatings

使用定制压电光谱涂层测量复合材料的应力传感

• DOI: 10.1063/1.5084964
• 发表时间: 2019
• 期刊: AIP Advances
• 影响因子: 1.6
• 作者: Esteves, Remelisa;Hernandez, Johnathan;Vo, Khanh;Hoover, Ryan;Freihofer, Gregory;Raghavan, Seetha
• 通讯作者: Raghavan, Seetha